/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 21:23:05,639 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 21:23:05,641 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 21:23:05,666 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 21:23:05,697 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-03-10 21:23:05,717 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 21:23:05,718 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 21:23:05,718 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 21:23:05,718 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 21:23:05,719 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 21:23:05,719 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 21:23:05,720 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 21:23:05,720 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 21:23:05,720 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 21:23:05,720 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 21:23:05,720 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 21:23:05,721 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 21:23:05,721 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 21:23:05,721 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 21:23:05,721 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 21:23:05,721 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 21:23:05,721 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 21:23:05,722 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 21:23:05,722 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 21:23:05,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 21:23:05,722 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 21:23:05,722 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 21:23:05,723 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 21:23:05,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 21:23:05,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 21:23:05,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 21:23:05,723 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 21:23:05,724 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 21:23:05,724 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 21:23:05,724 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 21:23:05,724 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 21:23:05,725 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 21:23:06,005 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 21:23:06,032 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 21:23:06,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 21:23:06,036 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 21:23:06,038 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 21:23:06,038 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-2.wvr.bpl [2021-03-10 21:23:06,039 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-2.wvr.bpl' [2021-03-10 21:23:06,068 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 21:23:06,075 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 21:23:06,076 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 21:23:06,076 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 21:23:06,076 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 21:23:06,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:23:06" (1/1) ... [2021-03-10 21:23:06,095 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:23:06" (1/1) ... [2021-03-10 21:23:06,101 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 21:23:06,103 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 21:23:06,103 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 21:23:06,104 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 21:23:06,114 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:23:06" (1/1) ... [2021-03-10 21:23:06,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:23:06" (1/1) ... [2021-03-10 21:23:06,115 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:23:06" (1/1) ... [2021-03-10 21:23:06,115 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:23:06" (1/1) ... [2021-03-10 21:23:06,118 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:23:06" (1/1) ... [2021-03-10 21:23:06,120 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:23:06" (1/1) ... [2021-03-10 21:23:06,121 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:23:06" (1/1) ... [2021-03-10 21:23:06,122 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 21:23:06,123 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 21:23:06,123 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 21:23:06,123 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 21:23:06,125 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:23:06" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 21:23:06,180 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 21:23:06,180 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 21:23:06,181 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 21:23:06,181 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 21:23:06,181 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 21:23:06,181 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 21:23:06,181 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 21:23:06,181 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 21:23:06,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 21:23:06,182 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 21:23:06,358 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 21:23:06,358 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-03-10 21:23:06,359 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-03-10 21:23:06,359 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-03-10 21:23:06,360 INFO L202 PluginConnector]: Adding new model unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:23:06 BoogieIcfgContainer [2021-03-10 21:23:06,360 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 21:23:06,361 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 21:23:06,361 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 21:23:06,364 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 21:23:06,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:23:06" (1/2) ... [2021-03-10 21:23:06,365 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@795e6ff9 and model type unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 09:23:06, skipping insertion in model container [2021-03-10 21:23:06,365 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:23:06" (2/2) ... [2021-03-10 21:23:06,366 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-2.wvr.bpl [2021-03-10 21:23:06,370 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 21:23:06,370 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 21:23:06,373 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 21:23:06,373 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 21:23:06,395 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-10 21:23:06,409 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 21:23:06,423 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 21:23:06,423 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 21:23:06,423 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 21:23:06,423 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 21:23:06,424 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 21:23:06,424 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 21:23:06,424 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 21:23:06,424 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 21:23:06,430 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-03-10 21:23:06,438 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:06,440 INFO L276 IsEmpty]: Start isEmpty. Operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:06,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-03-10 21:23:06,444 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:06,444 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:06,445 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:06,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:06,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1694861722, now seen corresponding path program 1 times [2021-03-10 21:23:06,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:06,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421372851] [2021-03-10 21:23:06,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:06,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:06,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:06,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421372851] [2021-03-10 21:23:06,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:23:06,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-10 21:23:06,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17858818] [2021-03-10 21:23:06,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 21:23:06,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:06,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 21:23:06,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 21:23:06,607 INFO L87 Difference]: Start difference. First operand has 15 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:06,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:06,624 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2021-03-10 21:23:06,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 21:23:06,626 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-03-10 21:23:06,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:06,632 INFO L225 Difference]: With dead ends: 22 [2021-03-10 21:23:06,633 INFO L226 Difference]: Without dead ends: 19 [2021-03-10 21:23:06,634 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 21:23:06,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-03-10 21:23:06,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-03-10 21:23:06,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:06,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2021-03-10 21:23:06,658 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2021-03-10 21:23:06,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:06,659 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2021-03-10 21:23:06,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:06,659 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-03-10 21:23:06,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-10 21:23:06,660 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:06,660 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:06,660 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 21:23:06,660 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:06,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:06,661 INFO L82 PathProgramCache]: Analyzing trace with hash 658584646, now seen corresponding path program 1 times [2021-03-10 21:23:06,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:06,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589545427] [2021-03-10 21:23:06,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:06,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:06,695 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:06,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589545427] [2021-03-10 21:23:06,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384648287] [2021-03-10 21:23:06,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:06,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:06,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-03-10 21:23:06,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:06,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:06,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:06,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-03-10 21:23:06,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662710919] [2021-03-10 21:23:06,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:23:06,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:06,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:23:06,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:23:06,808 INFO L87 Difference]: Start difference. First operand 19 states and 33 transitions. Second operand has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:06,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:06,841 INFO L93 Difference]: Finished difference Result 28 states and 45 transitions. [2021-03-10 21:23:06,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:23:06,842 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-03-10 21:23:06,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:06,842 INFO L225 Difference]: With dead ends: 28 [2021-03-10 21:23:06,842 INFO L226 Difference]: Without dead ends: 28 [2021-03-10 21:23:06,843 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 22.7ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:23:06,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-03-10 21:23:06,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-03-10 21:23:06,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:06,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 35 transitions. [2021-03-10 21:23:06,847 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 35 transitions. Word has length 10 [2021-03-10 21:23:06,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:06,848 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 35 transitions. [2021-03-10 21:23:06,848 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.6) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:06,848 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 35 transitions. [2021-03-10 21:23:06,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-10 21:23:06,848 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:06,849 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:07,071 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-03-10 21:23:07,071 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:07,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:07,072 INFO L82 PathProgramCache]: Analyzing trace with hash -978034129, now seen corresponding path program 1 times [2021-03-10 21:23:07,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:07,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490965321] [2021-03-10 21:23:07,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:07,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:07,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:07,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490965321] [2021-03-10 21:23:07,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:23:07,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 21:23:07,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391085411] [2021-03-10 21:23:07,109 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:23:07,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:07,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:23:07,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:23:07,110 INFO L87 Difference]: Start difference. First operand 19 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:07,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:07,145 INFO L93 Difference]: Finished difference Result 22 states and 36 transitions. [2021-03-10 21:23:07,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:23:07,146 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-03-10 21:23:07,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:07,147 INFO L225 Difference]: With dead ends: 22 [2021-03-10 21:23:07,147 INFO L226 Difference]: Without dead ends: 18 [2021-03-10 21:23:07,148 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 18.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:23:07,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-03-10 21:23:07,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-03-10 21:23:07,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:07,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2021-03-10 21:23:07,151 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2021-03-10 21:23:07,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:07,151 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2021-03-10 21:23:07,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:07,151 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2021-03-10 21:23:07,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-03-10 21:23:07,151 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:07,151 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:07,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 21:23:07,152 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:07,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:07,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1576587559, now seen corresponding path program 2 times [2021-03-10 21:23:07,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:07,153 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435379970] [2021-03-10 21:23:07,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:07,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:07,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435379970] [2021-03-10 21:23:07,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:23:07,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 21:23:07,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745196894] [2021-03-10 21:23:07,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:23:07,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:07,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:23:07,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:23:07,228 INFO L87 Difference]: Start difference. First operand 18 states and 31 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:07,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:07,249 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2021-03-10 21:23:07,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:23:07,249 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-03-10 21:23:07,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:07,252 INFO L225 Difference]: With dead ends: 20 [2021-03-10 21:23:07,252 INFO L226 Difference]: Without dead ends: 20 [2021-03-10 21:23:07,253 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.2ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:23:07,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-03-10 21:23:07,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-03-10 21:23:07,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.8421052631578947) internal successors, (35), 19 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:07,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-03-10 21:23:07,263 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-03-10 21:23:07,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:07,263 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-03-10 21:23:07,263 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:07,263 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-03-10 21:23:07,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-03-10 21:23:07,264 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:07,264 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:07,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 21:23:07,264 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:07,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:07,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1035640753, now seen corresponding path program 1 times [2021-03-10 21:23:07,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:07,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138915212] [2021-03-10 21:23:07,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:07,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:07,304 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:07,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138915212] [2021-03-10 21:23:07,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911078679] [2021-03-10 21:23:07,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:07,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 21:23:07,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:07,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:07,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:07,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-03-10 21:23:07,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122172701] [2021-03-10 21:23:07,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-10 21:23:07,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:07,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-10 21:23:07,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:23:07,418 INFO L87 Difference]: Start difference. First operand 20 states and 35 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:07,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:07,443 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2021-03-10 21:23:07,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:23:07,443 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-03-10 21:23:07,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:07,444 INFO L225 Difference]: With dead ends: 24 [2021-03-10 21:23:07,444 INFO L226 Difference]: Without dead ends: 24 [2021-03-10 21:23:07,444 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-10 21:23:07,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-03-10 21:23:07,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-03-10 21:23:07,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.8695652173913044) internal successors, (43), 23 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:07,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-03-10 21:23:07,447 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2021-03-10 21:23:07,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:07,448 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-03-10 21:23:07,448 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:07,448 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-03-10 21:23:07,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 21:23:07,448 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:07,448 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:07,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:07,671 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:07,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:07,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1473521199, now seen corresponding path program 2 times [2021-03-10 21:23:07,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:07,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309504092] [2021-03-10 21:23:07,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:07,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:07,710 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:07,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309504092] [2021-03-10 21:23:07,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743212316] [2021-03-10 21:23:07,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:07,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:07,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:07,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:23:07,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:07,835 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:07,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-03-10 21:23:07,839 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:23:07,841 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:07,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:23:07,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-03-10 21:23:07,849 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:07,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:07,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-03-10 21:23:07,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11788268] [2021-03-10 21:23:07,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:07,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:07,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:07,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:07,851 INFO L87 Difference]: Start difference. First operand 24 states and 43 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:07,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:07,888 INFO L93 Difference]: Finished difference Result 54 states and 96 transitions. [2021-03-10 21:23:07,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:23:07,889 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-03-10 21:23:07,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:07,890 INFO L225 Difference]: With dead ends: 54 [2021-03-10 21:23:07,890 INFO L226 Difference]: Without dead ends: 51 [2021-03-10 21:23:07,890 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:07,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-03-10 21:23:07,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 34. [2021-03-10 21:23:07,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.121212121212121) internal successors, (70), 33 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:07,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 70 transitions. [2021-03-10 21:23:07,895 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 70 transitions. Word has length 12 [2021-03-10 21:23:07,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:07,895 INFO L480 AbstractCegarLoop]: Abstraction has 34 states and 70 transitions. [2021-03-10 21:23:07,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:07,895 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 70 transitions. [2021-03-10 21:23:07,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 21:23:07,896 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:07,896 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:08,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:08,112 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:08,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:08,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1077921553, now seen corresponding path program 3 times [2021-03-10 21:23:08,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:08,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506873360] [2021-03-10 21:23:08,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:08,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:08,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506873360] [2021-03-10 21:23:08,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763049249] [2021-03-10 21:23:08,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:08,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:23:08,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:08,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:23:08,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:08,253 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:08,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-03-10 21:23:08,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:23:08,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:08,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:23:08,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-03-10 21:23:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:08,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:08,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-03-10 21:23:08,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655358916] [2021-03-10 21:23:08,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:08,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:08,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:08,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:08,289 INFO L87 Difference]: Start difference. First operand 34 states and 70 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:08,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:08,322 INFO L93 Difference]: Finished difference Result 61 states and 117 transitions. [2021-03-10 21:23:08,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:23:08,322 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-03-10 21:23:08,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:08,325 INFO L225 Difference]: With dead ends: 61 [2021-03-10 21:23:08,325 INFO L226 Difference]: Without dead ends: 58 [2021-03-10 21:23:08,325 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:08,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-03-10 21:23:08,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 39. [2021-03-10 21:23:08,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 2.289473684210526) internal successors, (87), 38 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:08,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 87 transitions. [2021-03-10 21:23:08,341 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 87 transitions. Word has length 12 [2021-03-10 21:23:08,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:08,342 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 87 transitions. [2021-03-10 21:23:08,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:08,342 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 87 transitions. [2021-03-10 21:23:08,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-03-10 21:23:08,343 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:08,343 INFO L519 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:08,563 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:08,563 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:08,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:08,564 INFO L82 PathProgramCache]: Analyzing trace with hash -452129241, now seen corresponding path program 4 times [2021-03-10 21:23:08,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:08,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849751772] [2021-03-10 21:23:08,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:08,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:08,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:08,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849751772] [2021-03-10 21:23:08,605 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467394114] [2021-03-10 21:23:08,605 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:08,634 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:08,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:08,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:23:08,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:08,682 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:08,682 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 18 [2021-03-10 21:23:08,685 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:23:08,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:08,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:23:08,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:15, output treesize:3 [2021-03-10 21:23:08,696 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:08,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:08,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-03-10 21:23:08,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193694937] [2021-03-10 21:23:08,697 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:08,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:08,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:08,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:08,698 INFO L87 Difference]: Start difference. First operand 39 states and 87 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:08,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:08,734 INFO L93 Difference]: Finished difference Result 68 states and 138 transitions. [2021-03-10 21:23:08,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:23:08,735 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-03-10 21:23:08,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:08,735 INFO L225 Difference]: With dead ends: 68 [2021-03-10 21:23:08,735 INFO L226 Difference]: Without dead ends: 65 [2021-03-10 21:23:08,736 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 33.6ms TimeCoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:08,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-03-10 21:23:08,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 46. [2021-03-10 21:23:08,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.4) internal successors, (108), 45 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:08,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 108 transitions. [2021-03-10 21:23:08,740 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 108 transitions. Word has length 12 [2021-03-10 21:23:08,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:08,740 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 108 transitions. [2021-03-10 21:23:08,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:08,740 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 108 transitions. [2021-03-10 21:23:08,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:23:08,741 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:08,741 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:08,962 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:08,963 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:08,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:08,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1948130383, now seen corresponding path program 5 times [2021-03-10 21:23:08,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:08,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953134705] [2021-03-10 21:23:08,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:08,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:09,008 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:09,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953134705] [2021-03-10 21:23:09,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31925542] [2021-03-10 21:23:09,009 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:09,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:23:09,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:09,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:23:09,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:09,102 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:09,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:09,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-03-10 21:23:09,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439128227] [2021-03-10 21:23:09,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:09,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:09,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:09,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:09,104 INFO L87 Difference]: Start difference. First operand 46 states and 108 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:09,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:09,183 INFO L93 Difference]: Finished difference Result 90 states and 168 transitions. [2021-03-10 21:23:09,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:23:09,184 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:23:09,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:09,185 INFO L225 Difference]: With dead ends: 90 [2021-03-10 21:23:09,185 INFO L226 Difference]: Without dead ends: 90 [2021-03-10 21:23:09,185 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:09,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-03-10 21:23:09,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 46. [2021-03-10 21:23:09,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.4444444444444446) internal successors, (110), 45 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:09,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 110 transitions. [2021-03-10 21:23:09,189 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 110 transitions. Word has length 13 [2021-03-10 21:23:09,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:09,189 INFO L480 AbstractCegarLoop]: Abstraction has 46 states and 110 transitions. [2021-03-10 21:23:09,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:09,189 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 110 transitions. [2021-03-10 21:23:09,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:23:09,190 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:09,190 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:09,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:09,411 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:09,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:09,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1542411386, now seen corresponding path program 6 times [2021-03-10 21:23:09,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:09,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488475322] [2021-03-10 21:23:09,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:09,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:09,454 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:09,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488475322] [2021-03-10 21:23:09,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029946748] [2021-03-10 21:23:09,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:09,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:23:09,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:09,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:23:09,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:09,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:09,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:09,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-03-10 21:23:09,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618909226] [2021-03-10 21:23:09,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:09,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:09,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:09,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:09,537 INFO L87 Difference]: Start difference. First operand 46 states and 110 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:09,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:09,634 INFO L93 Difference]: Finished difference Result 87 states and 172 transitions. [2021-03-10 21:23:09,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:23:09,635 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:23:09,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:09,636 INFO L225 Difference]: With dead ends: 87 [2021-03-10 21:23:09,636 INFO L226 Difference]: Without dead ends: 82 [2021-03-10 21:23:09,636 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:09,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-03-10 21:23:09,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 56. [2021-03-10 21:23:09,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.418181818181818) internal successors, (133), 55 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:09,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 133 transitions. [2021-03-10 21:23:09,642 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 133 transitions. Word has length 13 [2021-03-10 21:23:09,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:09,642 INFO L480 AbstractCegarLoop]: Abstraction has 56 states and 133 transitions. [2021-03-10 21:23:09,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:09,642 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 133 transitions. [2021-03-10 21:23:09,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:23:09,643 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:09,643 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:09,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-03-10 21:23:09,851 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:09,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:09,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1142142321, now seen corresponding path program 7 times [2021-03-10 21:23:09,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:09,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499384937] [2021-03-10 21:23:09,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:09,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:09,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499384937] [2021-03-10 21:23:09,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175190420] [2021-03-10 21:23:09,900 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:09,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:23:09,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:09,962 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:09,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:09,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 21:23:09,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774272117] [2021-03-10 21:23:09,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:23:09,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:09,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:23:09,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:23:09,964 INFO L87 Difference]: Start difference. First operand 56 states and 133 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:10,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:10,023 INFO L93 Difference]: Finished difference Result 71 states and 152 transitions. [2021-03-10 21:23:10,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:23:10,023 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:23:10,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:10,024 INFO L225 Difference]: With dead ends: 71 [2021-03-10 21:23:10,024 INFO L226 Difference]: Without dead ends: 70 [2021-03-10 21:23:10,024 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:10,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-03-10 21:23:10,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 57. [2021-03-10 21:23:10,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.375) internal successors, (133), 56 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:10,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 133 transitions. [2021-03-10 21:23:10,028 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 133 transitions. Word has length 13 [2021-03-10 21:23:10,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:10,028 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 133 transitions. [2021-03-10 21:23:10,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:10,028 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 133 transitions. [2021-03-10 21:23:10,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:23:10,029 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:10,029 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:10,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-03-10 21:23:10,250 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:10,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:10,251 INFO L82 PathProgramCache]: Analyzing trace with hash 2059198674, now seen corresponding path program 8 times [2021-03-10 21:23:10,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:10,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740816568] [2021-03-10 21:23:10,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:10,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:10,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:10,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740816568] [2021-03-10 21:23:10,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694036455] [2021-03-10 21:23:10,299 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:10,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:10,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:10,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:23:10,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:10,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:10,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 21:23:10,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646367330] [2021-03-10 21:23:10,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:23:10,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:10,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:23:10,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:23:10,392 INFO L87 Difference]: Start difference. First operand 57 states and 133 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:10,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:10,427 INFO L93 Difference]: Finished difference Result 88 states and 173 transitions. [2021-03-10 21:23:10,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:23:10,428 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:23:10,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:10,428 INFO L225 Difference]: With dead ends: 88 [2021-03-10 21:23:10,428 INFO L226 Difference]: Without dead ends: 88 [2021-03-10 21:23:10,429 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 26.3ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:10,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-03-10 21:23:10,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 57. [2021-03-10 21:23:10,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.375) internal successors, (133), 56 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:10,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 133 transitions. [2021-03-10 21:23:10,439 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 133 transitions. Word has length 13 [2021-03-10 21:23:10,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:10,439 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 133 transitions. [2021-03-10 21:23:10,439 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:10,439 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 133 transitions. [2021-03-10 21:23:10,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:23:10,442 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:10,442 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:10,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:10,663 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:10,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:10,664 INFO L82 PathProgramCache]: Analyzing trace with hash 22479943, now seen corresponding path program 9 times [2021-03-10 21:23:10,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:10,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953922277] [2021-03-10 21:23:10,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:10,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:10,699 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:10,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953922277] [2021-03-10 21:23:10,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650509663] [2021-03-10 21:23:10,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:10,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:23:10,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:10,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:23:10,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:10,781 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:10,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:10,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 21:23:10,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782680988] [2021-03-10 21:23:10,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:23:10,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:10,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:23:10,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:23:10,783 INFO L87 Difference]: Start difference. First operand 57 states and 133 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:10,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:10,812 INFO L93 Difference]: Finished difference Result 97 states and 193 transitions. [2021-03-10 21:23:10,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:23:10,813 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:23:10,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:10,813 INFO L225 Difference]: With dead ends: 97 [2021-03-10 21:23:10,813 INFO L226 Difference]: Without dead ends: 97 [2021-03-10 21:23:10,814 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:10,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-03-10 21:23:10,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 60. [2021-03-10 21:23:10,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.4237288135593222) internal successors, (143), 59 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:10,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 143 transitions. [2021-03-10 21:23:10,817 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 143 transitions. Word has length 13 [2021-03-10 21:23:10,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:10,817 INFO L480 AbstractCegarLoop]: Abstraction has 60 states and 143 transitions. [2021-03-10 21:23:10,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:10,818 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 143 transitions. [2021-03-10 21:23:10,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:23:10,818 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:10,818 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:11,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:11,041 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:11,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:11,041 INFO L82 PathProgramCache]: Analyzing trace with hash 967241926, now seen corresponding path program 10 times [2021-03-10 21:23:11,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:11,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226883251] [2021-03-10 21:23:11,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:11,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:11,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:11,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226883251] [2021-03-10 21:23:11,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034263055] [2021-03-10 21:23:11,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:11,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:11,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:11,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:23:11,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:11,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:11,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:11,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 21:23:11,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285093629] [2021-03-10 21:23:11,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:23:11,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:11,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:23:11,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:23:11,126 INFO L87 Difference]: Start difference. First operand 60 states and 143 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:11,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:11,196 INFO L93 Difference]: Finished difference Result 99 states and 200 transitions. [2021-03-10 21:23:11,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:23:11,197 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:23:11,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:11,198 INFO L225 Difference]: With dead ends: 99 [2021-03-10 21:23:11,199 INFO L226 Difference]: Without dead ends: 97 [2021-03-10 21:23:11,199 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 35.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:11,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-03-10 21:23:11,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 64. [2021-03-10 21:23:11,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.492063492063492) internal successors, (157), 63 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:11,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2021-03-10 21:23:11,207 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 13 [2021-03-10 21:23:11,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:11,207 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2021-03-10 21:23:11,207 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:11,207 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2021-03-10 21:23:11,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:23:11,209 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:11,209 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:11,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-03-10 21:23:11,423 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:11,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:11,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1767934633, now seen corresponding path program 11 times [2021-03-10 21:23:11,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:11,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94691092] [2021-03-10 21:23:11,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:11,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:11,472 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:11,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94691092] [2021-03-10 21:23:11,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618927950] [2021-03-10 21:23:11,472 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:11,497 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:23:11,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:11,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:23:11,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:11,539 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:11,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:11,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 21:23:11,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320022311] [2021-03-10 21:23:11,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:23:11,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:11,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:23:11,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:23:11,540 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:11,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:11,596 INFO L93 Difference]: Finished difference Result 101 states and 205 transitions. [2021-03-10 21:23:11,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:23:11,596 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:23:11,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:11,597 INFO L225 Difference]: With dead ends: 101 [2021-03-10 21:23:11,597 INFO L226 Difference]: Without dead ends: 100 [2021-03-10 21:23:11,599 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:11,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-03-10 21:23:11,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2021-03-10 21:23:11,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.4761904761904763) internal successors, (156), 63 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:11,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 156 transitions. [2021-03-10 21:23:11,607 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 156 transitions. Word has length 13 [2021-03-10 21:23:11,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:11,607 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 156 transitions. [2021-03-10 21:23:11,607 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:11,607 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 156 transitions. [2021-03-10 21:23:11,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:23:11,608 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:11,608 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:11,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 21:23:11,823 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:11,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:11,824 INFO L82 PathProgramCache]: Analyzing trace with hash -1609976310, now seen corresponding path program 12 times [2021-03-10 21:23:11,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:11,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844627795] [2021-03-10 21:23:11,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:11,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:11,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:11,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844627795] [2021-03-10 21:23:11,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849807361] [2021-03-10 21:23:11,858 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:11,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:23:11,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:11,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:23:11,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:11,904 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:11,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:11,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-03-10 21:23:11,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300052255] [2021-03-10 21:23:11,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:23:11,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:11,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:23:11,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:23:11,906 INFO L87 Difference]: Start difference. First operand 64 states and 156 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:11,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:11,947 INFO L93 Difference]: Finished difference Result 98 states and 199 transitions. [2021-03-10 21:23:11,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:23:11,948 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:23:11,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:11,948 INFO L225 Difference]: With dead ends: 98 [2021-03-10 21:23:11,949 INFO L226 Difference]: Without dead ends: 98 [2021-03-10 21:23:11,949 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:11,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-03-10 21:23:11,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2021-03-10 21:23:11,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.4761904761904763) internal successors, (156), 63 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:11,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 156 transitions. [2021-03-10 21:23:11,951 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 156 transitions. Word has length 13 [2021-03-10 21:23:11,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:11,952 INFO L480 AbstractCegarLoop]: Abstraction has 64 states and 156 transitions. [2021-03-10 21:23:11,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:11,952 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 156 transitions. [2021-03-10 21:23:11,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:23:11,952 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:11,952 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:12,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-03-10 21:23:12,167 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:12,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:12,167 INFO L82 PathProgramCache]: Analyzing trace with hash -816419355, now seen corresponding path program 13 times [2021-03-10 21:23:12,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:12,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995147551] [2021-03-10 21:23:12,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:12,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:12,207 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:12,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995147551] [2021-03-10 21:23:12,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550840010] [2021-03-10 21:23:12,208 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:12,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:12,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:23:12,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:12,269 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:12,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:12,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-03-10 21:23:12,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285350] [2021-03-10 21:23:12,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:12,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:12,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:12,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:12,271 INFO L87 Difference]: Start difference. First operand 64 states and 156 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:12,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:12,337 INFO L93 Difference]: Finished difference Result 94 states and 196 transitions. [2021-03-10 21:23:12,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:23:12,338 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:23:12,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:12,340 INFO L225 Difference]: With dead ends: 94 [2021-03-10 21:23:12,340 INFO L226 Difference]: Without dead ends: 92 [2021-03-10 21:23:12,340 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 56.5ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:12,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-03-10 21:23:12,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2021-03-10 21:23:12,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.453125) internal successors, (157), 64 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:12,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2021-03-10 21:23:12,349 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 13 [2021-03-10 21:23:12,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:12,349 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2021-03-10 21:23:12,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:12,349 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2021-03-10 21:23:12,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:23:12,350 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:12,350 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:12,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:12,555 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:12,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:12,556 INFO L82 PathProgramCache]: Analyzing trace with hash 955943652, now seen corresponding path program 14 times [2021-03-10 21:23:12,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:12,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236430763] [2021-03-10 21:23:12,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:12,606 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:12,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236430763] [2021-03-10 21:23:12,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897454622] [2021-03-10 21:23:12,606 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:12,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:12,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:12,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:23:12,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:12,677 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:12,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:12,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-03-10 21:23:12,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411458864] [2021-03-10 21:23:12,678 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:12,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:12,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:12,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:12,678 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:12,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:12,752 INFO L93 Difference]: Finished difference Result 101 states and 203 transitions. [2021-03-10 21:23:12,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:23:12,754 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:23:12,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:12,754 INFO L225 Difference]: With dead ends: 101 [2021-03-10 21:23:12,754 INFO L226 Difference]: Without dead ends: 101 [2021-03-10 21:23:12,754 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 42.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:12,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-03-10 21:23:12,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 65. [2021-03-10 21:23:12,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.453125) internal successors, (157), 64 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:12,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2021-03-10 21:23:12,757 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 13 [2021-03-10 21:23:12,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:12,757 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2021-03-10 21:23:12,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:12,757 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2021-03-10 21:23:12,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:23:12,758 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:12,758 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:12,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-10 21:23:12,971 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:12,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:12,971 INFO L82 PathProgramCache]: Analyzing trace with hash -2052794865, now seen corresponding path program 15 times [2021-03-10 21:23:12,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:12,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824100325] [2021-03-10 21:23:12,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:12,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:13,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:13,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824100325] [2021-03-10 21:23:13,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855203229] [2021-03-10 21:23:13,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:13,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:23:13,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:13,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:23:13,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:13,062 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:13,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:13,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-03-10 21:23:13,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253906499] [2021-03-10 21:23:13,063 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:13,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:13,063 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:13,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:13,064 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:13,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:13,105 INFO L93 Difference]: Finished difference Result 118 states and 240 transitions. [2021-03-10 21:23:13,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:23:13,106 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:23:13,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:13,106 INFO L225 Difference]: With dead ends: 118 [2021-03-10 21:23:13,106 INFO L226 Difference]: Without dead ends: 118 [2021-03-10 21:23:13,107 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 36.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:23:13,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-03-10 21:23:13,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 69. [2021-03-10 21:23:13,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.5294117647058822) internal successors, (172), 68 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:13,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 172 transitions. [2021-03-10 21:23:13,109 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 172 transitions. Word has length 13 [2021-03-10 21:23:13,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:13,110 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 172 transitions. [2021-03-10 21:23:13,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:13,110 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 172 transitions. [2021-03-10 21:23:13,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:23:13,110 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:13,110 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:13,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:13,329 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:13,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:13,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1108032882, now seen corresponding path program 16 times [2021-03-10 21:23:13,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:13,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806022607] [2021-03-10 21:23:13,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:13,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:13,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:13,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806022607] [2021-03-10 21:23:13,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960922188] [2021-03-10 21:23:13,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:13,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:13,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:13,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:23:13,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:13,434 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:13,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:13,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-03-10 21:23:13,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343709070] [2021-03-10 21:23:13,435 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:13,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:13,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:13,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:13,435 INFO L87 Difference]: Start difference. First operand 69 states and 172 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:13,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:13,515 INFO L93 Difference]: Finished difference Result 109 states and 231 transitions. [2021-03-10 21:23:13,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:23:13,516 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:23:13,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:13,517 INFO L225 Difference]: With dead ends: 109 [2021-03-10 21:23:13,517 INFO L226 Difference]: Without dead ends: 107 [2021-03-10 21:23:13,517 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:13,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-03-10 21:23:13,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2021-03-10 21:23:13,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.5945945945945947) internal successors, (192), 74 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:13,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 192 transitions. [2021-03-10 21:23:13,521 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 192 transitions. Word has length 13 [2021-03-10 21:23:13,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:13,521 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 192 transitions. [2021-03-10 21:23:13,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:13,521 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 192 transitions. [2021-03-10 21:23:13,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:23:13,521 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:13,521 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:13,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:13,743 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:13,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:13,743 INFO L82 PathProgramCache]: Analyzing trace with hash -307340175, now seen corresponding path program 17 times [2021-03-10 21:23:13,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:13,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315173699] [2021-03-10 21:23:13,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:13,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:13,782 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:13,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315173699] [2021-03-10 21:23:13,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030383651] [2021-03-10 21:23:13,783 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:13,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:23:13,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:13,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:23:13,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:13,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:13,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:13,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-03-10 21:23:13,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583228648] [2021-03-10 21:23:13,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:13,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:13,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:13,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:13,861 INFO L87 Difference]: Start difference. First operand 75 states and 192 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:13,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:13,918 INFO L93 Difference]: Finished difference Result 114 states and 244 transitions. [2021-03-10 21:23:13,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:23:13,919 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:23:13,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:13,919 INFO L225 Difference]: With dead ends: 114 [2021-03-10 21:23:13,919 INFO L226 Difference]: Without dead ends: 113 [2021-03-10 21:23:13,920 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 52.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:13,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-03-10 21:23:13,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 75. [2021-03-10 21:23:13,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.581081081081081) internal successors, (191), 74 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:13,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 191 transitions. [2021-03-10 21:23:13,926 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 191 transitions. Word has length 13 [2021-03-10 21:23:13,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:13,926 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 191 transitions. [2021-03-10 21:23:13,926 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:13,926 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 191 transitions. [2021-03-10 21:23:13,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:23:13,929 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:13,929 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:14,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-03-10 21:23:14,129 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:14,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:14,130 INFO L82 PathProgramCache]: Analyzing trace with hash 609716178, now seen corresponding path program 18 times [2021-03-10 21:23:14,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:14,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782899483] [2021-03-10 21:23:14,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:14,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:14,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:14,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782899483] [2021-03-10 21:23:14,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507592660] [2021-03-10 21:23:14,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:14,209 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:23:14,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:14,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:23:14,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:14,247 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:14,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:14,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-03-10 21:23:14,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670078955] [2021-03-10 21:23:14,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:23:14,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:14,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:23:14,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:23:14,248 INFO L87 Difference]: Start difference. First operand 75 states and 191 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:14,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:14,306 INFO L93 Difference]: Finished difference Result 102 states and 223 transitions. [2021-03-10 21:23:14,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:23:14,306 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:23:14,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:14,307 INFO L225 Difference]: With dead ends: 102 [2021-03-10 21:23:14,307 INFO L226 Difference]: Without dead ends: 102 [2021-03-10 21:23:14,308 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 48.2ms TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:14,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-03-10 21:23:14,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 74. [2021-03-10 21:23:14,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5342465753424657) internal successors, (185), 73 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:14,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2021-03-10 21:23:14,311 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 13 [2021-03-10 21:23:14,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:14,311 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2021-03-10 21:23:14,311 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 7 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:14,311 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2021-03-10 21:23:14,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:23:14,311 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:14,312 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:14,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:14,532 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:14,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:14,532 INFO L82 PathProgramCache]: Analyzing trace with hash 1403273133, now seen corresponding path program 19 times [2021-03-10 21:23:14,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:14,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949722319] [2021-03-10 21:23:14,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:14,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:14,563 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:14,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949722319] [2021-03-10 21:23:14,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714234654] [2021-03-10 21:23:14,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:14,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:14,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:23:14,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:14,631 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:14,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:14,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-10 21:23:14,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932646546] [2021-03-10 21:23:14,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:23:14,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:14,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:23:14,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:23:14,632 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:14,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:14,717 INFO L93 Difference]: Finished difference Result 118 states and 244 transitions. [2021-03-10 21:23:14,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:23:14,717 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:23:14,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:14,718 INFO L225 Difference]: With dead ends: 118 [2021-03-10 21:23:14,718 INFO L226 Difference]: Without dead ends: 116 [2021-03-10 21:23:14,718 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 55.6ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:14,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-03-10 21:23:14,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 74. [2021-03-10 21:23:14,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5205479452054793) internal successors, (184), 73 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:14,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 184 transitions. [2021-03-10 21:23:14,723 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 184 transitions. Word has length 13 [2021-03-10 21:23:14,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:14,723 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 184 transitions. [2021-03-10 21:23:14,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:14,723 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 184 transitions. [2021-03-10 21:23:14,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:23:14,724 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:14,724 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:14,947 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-10 21:23:14,948 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:14,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:14,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1119331156, now seen corresponding path program 20 times [2021-03-10 21:23:14,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:14,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645836222] [2021-03-10 21:23:14,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:14,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:14,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:14,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645836222] [2021-03-10 21:23:14,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084174034] [2021-03-10 21:23:14,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:15,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:15,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:15,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:23:15,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:15,065 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:15,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:15,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-10 21:23:15,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060909528] [2021-03-10 21:23:15,066 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:23:15,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:15,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:23:15,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:23:15,067 INFO L87 Difference]: Start difference. First operand 74 states and 184 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:15,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:15,146 INFO L93 Difference]: Finished difference Result 103 states and 223 transitions. [2021-03-10 21:23:15,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:23:15,147 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:23:15,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:15,148 INFO L225 Difference]: With dead ends: 103 [2021-03-10 21:23:15,148 INFO L226 Difference]: Without dead ends: 103 [2021-03-10 21:23:15,148 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:15,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-03-10 21:23:15,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 74. [2021-03-10 21:23:15,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.5205479452054793) internal successors, (184), 73 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:15,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 184 transitions. [2021-03-10 21:23:15,151 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 184 transitions. Word has length 13 [2021-03-10 21:23:15,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:15,151 INFO L480 AbstractCegarLoop]: Abstraction has 74 states and 184 transitions. [2021-03-10 21:23:15,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:15,151 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 184 transitions. [2021-03-10 21:23:15,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:23:15,151 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:15,152 INFO L519 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:15,369 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-03-10 21:23:15,370 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:15,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:15,370 INFO L82 PathProgramCache]: Analyzing trace with hash -1402289167, now seen corresponding path program 21 times [2021-03-10 21:23:15,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:15,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215009262] [2021-03-10 21:23:15,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:15,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:15,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:15,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215009262] [2021-03-10 21:23:15,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943855814] [2021-03-10 21:23:15,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:15,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:23:15,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:15,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:23:15,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:15,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:15,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:15,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-03-10 21:23:15,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881518163] [2021-03-10 21:23:15,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:23:15,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:15,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:23:15,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:15,495 INFO L87 Difference]: Start difference. First operand 74 states and 184 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:15,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:15,586 INFO L93 Difference]: Finished difference Result 107 states and 246 transitions. [2021-03-10 21:23:15,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:23:15,586 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:23:15,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:15,587 INFO L225 Difference]: With dead ends: 107 [2021-03-10 21:23:15,587 INFO L226 Difference]: Without dead ends: 104 [2021-03-10 21:23:15,587 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:15,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-03-10 21:23:15,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 73. [2021-03-10 21:23:15,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.5277777777777777) internal successors, (182), 72 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:15,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 182 transitions. [2021-03-10 21:23:15,590 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 182 transitions. Word has length 13 [2021-03-10 21:23:15,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:15,590 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 182 transitions. [2021-03-10 21:23:15,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:15,590 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 182 transitions. [2021-03-10 21:23:15,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-03-10 21:23:15,591 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:15,591 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:15,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:15,807 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:15,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:15,807 INFO L82 PathProgramCache]: Analyzing trace with hash 1114776338, now seen corresponding path program 22 times [2021-03-10 21:23:15,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:15,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433867144] [2021-03-10 21:23:15,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:15,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:15,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:15,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433867144] [2021-03-10 21:23:15,846 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075929979] [2021-03-10 21:23:15,846 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:15,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:15,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:15,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:23:15,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:15,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:15,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:15,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-03-10 21:23:15,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981414548] [2021-03-10 21:23:15,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:23:15,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:15,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:23:15,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:15,935 INFO L87 Difference]: Start difference. First operand 73 states and 182 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:16,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:16,069 INFO L93 Difference]: Finished difference Result 107 states and 252 transitions. [2021-03-10 21:23:16,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:23:16,069 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-03-10 21:23:16,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:16,070 INFO L225 Difference]: With dead ends: 107 [2021-03-10 21:23:16,070 INFO L226 Difference]: Without dead ends: 107 [2021-03-10 21:23:16,070 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 113.5ms TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:16,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-03-10 21:23:16,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2021-03-10 21:23:16,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 2.5421686746987953) internal successors, (211), 83 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:16,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 211 transitions. [2021-03-10 21:23:16,073 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 211 transitions. Word has length 13 [2021-03-10 21:23:16,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:16,074 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 211 transitions. [2021-03-10 21:23:16,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:16,074 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 211 transitions. [2021-03-10 21:23:16,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 21:23:16,074 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:16,074 INFO L519 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:16,275 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-03-10 21:23:16,275 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:16,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:16,275 INFO L82 PathProgramCache]: Analyzing trace with hash 285571430, now seen corresponding path program 23 times [2021-03-10 21:23:16,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:16,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342903953] [2021-03-10 21:23:16,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:16,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:16,311 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:23:16,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342903953] [2021-03-10 21:23:16,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944848892] [2021-03-10 21:23:16,311 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:16,332 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:23:16,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:16,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:16,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:16,374 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:23:16,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:16,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-03-10 21:23:16,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078141753] [2021-03-10 21:23:16,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:23:16,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:16,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:23:16,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:23:16,376 INFO L87 Difference]: Start difference. First operand 84 states and 211 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:16,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:16,430 INFO L93 Difference]: Finished difference Result 227 states and 579 transitions. [2021-03-10 21:23:16,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:23:16,430 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 21:23:16,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:16,431 INFO L225 Difference]: With dead ends: 227 [2021-03-10 21:23:16,431 INFO L226 Difference]: Without dead ends: 225 [2021-03-10 21:23:16,431 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:16,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-03-10 21:23:16,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 168. [2021-03-10 21:23:16,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.6347305389221556) internal successors, (440), 167 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:16,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 440 transitions. [2021-03-10 21:23:16,436 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 440 transitions. Word has length 14 [2021-03-10 21:23:16,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:16,436 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 440 transitions. [2021-03-10 21:23:16,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:16,437 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 440 transitions. [2021-03-10 21:23:16,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:23:16,437 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:16,437 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:16,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:16,651 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:16,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:16,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1118463878, now seen corresponding path program 24 times [2021-03-10 21:23:16,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:16,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764809241] [2021-03-10 21:23:16,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:16,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:16,679 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:16,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764809241] [2021-03-10 21:23:16,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454961744] [2021-03-10 21:23:16,680 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:16,701 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:23:16,702 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:16,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 21:23:16,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:16,825 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:16,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:23:16,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:23:16,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:16,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:23:16,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-03-10 21:23:16,873 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:16,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:16,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-03-10 21:23:16,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428240989] [2021-03-10 21:23:16,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:16,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:16,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:16,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:16,875 INFO L87 Difference]: Start difference. First operand 168 states and 440 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:16,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:16,940 INFO L93 Difference]: Finished difference Result 248 states and 589 transitions. [2021-03-10 21:23:16,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:23:16,941 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:23:16,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:16,942 INFO L225 Difference]: With dead ends: 248 [2021-03-10 21:23:16,942 INFO L226 Difference]: Without dead ends: 245 [2021-03-10 21:23:16,942 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:16,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-03-10 21:23:16,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 196. [2021-03-10 21:23:16,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.6666666666666665) internal successors, (520), 195 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:16,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 520 transitions. [2021-03-10 21:23:16,947 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 520 transitions. Word has length 15 [2021-03-10 21:23:16,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:16,947 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 520 transitions. [2021-03-10 21:23:16,948 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:16,948 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 520 transitions. [2021-03-10 21:23:16,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:23:16,948 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:16,948 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:17,163 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-03-10 21:23:17,163 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:17,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:17,164 INFO L82 PathProgramCache]: Analyzing trace with hash -678148380, now seen corresponding path program 25 times [2021-03-10 21:23:17,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:17,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682867523] [2021-03-10 21:23:17,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:17,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:17,205 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:17,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682867523] [2021-03-10 21:23:17,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789380452] [2021-03-10 21:23:17,205 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:17,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:17,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 21:23:17,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:17,322 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:17,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:23:17,368 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:23:17,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:17,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:23:17,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-03-10 21:23:17,377 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:17,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:17,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-03-10 21:23:17,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857662396] [2021-03-10 21:23:17,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:17,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:17,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:17,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:17,378 INFO L87 Difference]: Start difference. First operand 196 states and 520 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:17,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:17,456 INFO L93 Difference]: Finished difference Result 296 states and 729 transitions. [2021-03-10 21:23:17,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:23:17,457 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:23:17,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:17,458 INFO L225 Difference]: With dead ends: 296 [2021-03-10 21:23:17,458 INFO L226 Difference]: Without dead ends: 292 [2021-03-10 21:23:17,460 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:17,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-03-10 21:23:17,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 224. [2021-03-10 21:23:17,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.789237668161435) internal successors, (622), 223 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:17,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 622 transitions. [2021-03-10 21:23:17,466 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 622 transitions. Word has length 15 [2021-03-10 21:23:17,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:17,466 INFO L480 AbstractCegarLoop]: Abstraction has 224 states and 622 transitions. [2021-03-10 21:23:17,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:17,466 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 622 transitions. [2021-03-10 21:23:17,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:23:17,467 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:17,467 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:17,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-03-10 21:23:17,683 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:17,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:17,683 INFO L82 PathProgramCache]: Analyzing trace with hash -519315694, now seen corresponding path program 26 times [2021-03-10 21:23:17,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:17,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213538028] [2021-03-10 21:23:17,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:17,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:17,716 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:23:17,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213538028] [2021-03-10 21:23:17,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701044046] [2021-03-10 21:23:17,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:23:17,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:17,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:17,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:17,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:17,871 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:17,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:23:17,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:23:17,917 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:17,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:23:17,917 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-03-10 21:23:17,924 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:17,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:17,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-03-10 21:23:17,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628579684] [2021-03-10 21:23:17,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:17,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:17,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:17,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:17,926 INFO L87 Difference]: Start difference. First operand 224 states and 622 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:18,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:18,023 INFO L93 Difference]: Finished difference Result 353 states and 901 transitions. [2021-03-10 21:23:18,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:23:18,023 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:23:18,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:18,025 INFO L225 Difference]: With dead ends: 353 [2021-03-10 21:23:18,025 INFO L226 Difference]: Without dead ends: 349 [2021-03-10 21:23:18,025 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:18,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-03-10 21:23:18,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 269. [2021-03-10 21:23:18,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.906716417910448) internal successors, (779), 268 states have internal predecessors, (779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:18,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 779 transitions. [2021-03-10 21:23:18,032 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 779 transitions. Word has length 15 [2021-03-10 21:23:18,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:18,032 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 779 transitions. [2021-03-10 21:23:18,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:18,032 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 779 transitions. [2021-03-10 21:23:18,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:23:18,034 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:18,034 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:18,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-10 21:23:18,251 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:18,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:18,251 INFO L82 PathProgramCache]: Analyzing trace with hash 109530276, now seen corresponding path program 27 times [2021-03-10 21:23:18,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:18,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516314918] [2021-03-10 21:23:18,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:18,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:18,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516314918] [2021-03-10 21:23:18,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809732204] [2021-03-10 21:23:18,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:18,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:23:18,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:18,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 21:23:18,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:18,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:18,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:23:18,418 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:23:18,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:18,419 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:23:18,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-03-10 21:23:18,426 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:18,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:18,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-03-10 21:23:18,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270376981] [2021-03-10 21:23:18,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:18,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:18,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:18,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:18,428 INFO L87 Difference]: Start difference. First operand 269 states and 779 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:18,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:18,514 INFO L93 Difference]: Finished difference Result 397 states and 1046 transitions. [2021-03-10 21:23:18,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:23:18,515 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:23:18,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:18,517 INFO L225 Difference]: With dead ends: 397 [2021-03-10 21:23:18,517 INFO L226 Difference]: Without dead ends: 394 [2021-03-10 21:23:18,517 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 72.4ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:18,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-03-10 21:23:18,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 318. [2021-03-10 21:23:18,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 2.9589905362776023) internal successors, (938), 317 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:18,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 938 transitions. [2021-03-10 21:23:18,525 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 938 transitions. Word has length 15 [2021-03-10 21:23:18,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:18,525 INFO L480 AbstractCegarLoop]: Abstraction has 318 states and 938 transitions. [2021-03-10 21:23:18,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:18,526 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 938 transitions. [2021-03-10 21:23:18,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:23:18,527 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:18,527 INFO L519 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:18,735 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:18,735 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:18,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:18,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1871081134, now seen corresponding path program 28 times [2021-03-10 21:23:18,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:18,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234179843] [2021-03-10 21:23:18,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:18,769 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:18,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234179843] [2021-03-10 21:23:18,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768747614] [2021-03-10 21:23:18,769 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:18,799 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:18,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:18,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 21:23:18,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:18,896 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:18,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 23 treesize of output 64 [2021-03-10 21:23:18,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:23:18,922 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:18,923 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:23:18,923 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-03-10 21:23:18,930 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:18,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:18,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-03-10 21:23:18,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581757480] [2021-03-10 21:23:18,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:18,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:18,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:18,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:18,932 INFO L87 Difference]: Start difference. First operand 318 states and 938 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:19,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:19,020 INFO L93 Difference]: Finished difference Result 427 states and 1156 transitions. [2021-03-10 21:23:19,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:23:19,020 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:23:19,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:19,022 INFO L225 Difference]: With dead ends: 427 [2021-03-10 21:23:19,022 INFO L226 Difference]: Without dead ends: 424 [2021-03-10 21:23:19,023 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:19,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2021-03-10 21:23:19,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 357. [2021-03-10 21:23:19,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 357 states, 356 states have (on average 2.9831460674157304) internal successors, (1062), 356 states have internal predecessors, (1062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:19,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1062 transitions. [2021-03-10 21:23:19,034 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1062 transitions. Word has length 15 [2021-03-10 21:23:19,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:19,034 INFO L480 AbstractCegarLoop]: Abstraction has 357 states and 1062 transitions. [2021-03-10 21:23:19,034 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:19,034 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1062 transitions. [2021-03-10 21:23:19,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:23:19,035 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:19,035 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:19,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:19,243 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:19,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:19,244 INFO L82 PathProgramCache]: Analyzing trace with hash 335713551, now seen corresponding path program 29 times [2021-03-10 21:23:19,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:19,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044396728] [2021-03-10 21:23:19,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:19,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:19,291 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:19,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044396728] [2021-03-10 21:23:19,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167655505] [2021-03-10 21:23:19,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:19,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:23:19,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:19,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:19,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:19,358 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:19,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:19,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:23:19,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749997850] [2021-03-10 21:23:19,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:19,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:19,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:19,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:19,359 INFO L87 Difference]: Start difference. First operand 357 states and 1062 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:19,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:19,505 INFO L93 Difference]: Finished difference Result 482 states and 1270 transitions. [2021-03-10 21:23:19,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:23:19,506 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:23:19,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:19,508 INFO L225 Difference]: With dead ends: 482 [2021-03-10 21:23:19,508 INFO L226 Difference]: Without dead ends: 475 [2021-03-10 21:23:19,509 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:23:19,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-03-10 21:23:19,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 372. [2021-03-10 21:23:19,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.9838274932614555) internal successors, (1107), 371 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:19,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1107 transitions. [2021-03-10 21:23:19,521 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1107 transitions. Word has length 16 [2021-03-10 21:23:19,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:19,521 INFO L480 AbstractCegarLoop]: Abstraction has 372 states and 1107 transitions. [2021-03-10 21:23:19,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:19,521 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1107 transitions. [2021-03-10 21:23:19,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:23:19,522 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:19,522 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:19,735 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:19,735 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:19,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:19,735 INFO L82 PathProgramCache]: Analyzing trace with hash 2034224775, now seen corresponding path program 30 times [2021-03-10 21:23:19,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:19,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165866383] [2021-03-10 21:23:19,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:19,775 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:19,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165866383] [2021-03-10 21:23:19,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912378164] [2021-03-10 21:23:19,776 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:19,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:23:19,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:19,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:19,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:19,845 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:19,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:19,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:23:19,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752499512] [2021-03-10 21:23:19,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:23:19,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:19,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:23:19,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:23:19,846 INFO L87 Difference]: Start difference. First operand 372 states and 1107 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:19,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:19,890 INFO L93 Difference]: Finished difference Result 490 states and 1284 transitions. [2021-03-10 21:23:19,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:23:19,891 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:23:19,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:19,893 INFO L225 Difference]: With dead ends: 490 [2021-03-10 21:23:19,893 INFO L226 Difference]: Without dead ends: 490 [2021-03-10 21:23:19,893 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 35.9ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:19,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-03-10 21:23:19,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 352. [2021-03-10 21:23:19,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 351 states have (on average 2.9458689458689458) internal successors, (1034), 351 states have internal predecessors, (1034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:19,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 1034 transitions. [2021-03-10 21:23:19,902 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 1034 transitions. Word has length 16 [2021-03-10 21:23:19,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:19,903 INFO L480 AbstractCegarLoop]: Abstraction has 352 states and 1034 transitions. [2021-03-10 21:23:19,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:19,903 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 1034 transitions. [2021-03-10 21:23:19,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:23:19,904 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:19,904 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:20,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:20,125 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:20,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:20,125 INFO L82 PathProgramCache]: Analyzing trace with hash 475308401, now seen corresponding path program 31 times [2021-03-10 21:23:20,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:20,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764298203] [2021-03-10 21:23:20,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:20,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:20,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:20,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764298203] [2021-03-10 21:23:20,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482038761] [2021-03-10 21:23:20,174 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:20,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:20,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:20,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:20,227 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:20,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:20,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:23:20,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813644373] [2021-03-10 21:23:20,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:23:20,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:20,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:23:20,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:23:20,228 INFO L87 Difference]: Start difference. First operand 352 states and 1034 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:20,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:20,311 INFO L93 Difference]: Finished difference Result 466 states and 1205 transitions. [2021-03-10 21:23:20,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:23:20,311 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:23:20,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:20,313 INFO L225 Difference]: With dead ends: 466 [2021-03-10 21:23:20,313 INFO L226 Difference]: Without dead ends: 464 [2021-03-10 21:23:20,314 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:20,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-03-10 21:23:20,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 360. [2021-03-10 21:23:20,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 2.9442896935933147) internal successors, (1057), 359 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:20,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 1057 transitions. [2021-03-10 21:23:20,323 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 1057 transitions. Word has length 16 [2021-03-10 21:23:20,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:20,323 INFO L480 AbstractCegarLoop]: Abstraction has 360 states and 1057 transitions. [2021-03-10 21:23:20,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:20,324 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 1057 transitions. [2021-03-10 21:23:20,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:23:20,324 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:20,324 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:20,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-03-10 21:23:20,539 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:20,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:20,540 INFO L82 PathProgramCache]: Analyzing trace with hash -2101909835, now seen corresponding path program 32 times [2021-03-10 21:23:20,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:20,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400267924] [2021-03-10 21:23:20,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:20,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:20,580 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:20,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400267924] [2021-03-10 21:23:20,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543144969] [2021-03-10 21:23:20,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:20,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:20,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:20,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:20,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:20,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:20,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:20,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:23:20,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343170661] [2021-03-10 21:23:20,643 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:23:20,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:20,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:23:20,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:23:20,645 INFO L87 Difference]: Start difference. First operand 360 states and 1057 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:20,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:20,693 INFO L93 Difference]: Finished difference Result 501 states and 1267 transitions. [2021-03-10 21:23:20,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:23:20,693 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:23:20,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:20,695 INFO L225 Difference]: With dead ends: 501 [2021-03-10 21:23:20,696 INFO L226 Difference]: Without dead ends: 501 [2021-03-10 21:23:20,696 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 35.1ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:20,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-03-10 21:23:20,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 362. [2021-03-10 21:23:20,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.9445983379501386) internal successors, (1063), 361 states have internal predecessors, (1063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:20,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1063 transitions. [2021-03-10 21:23:20,706 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1063 transitions. Word has length 16 [2021-03-10 21:23:20,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:20,706 INFO L480 AbstractCegarLoop]: Abstraction has 362 states and 1063 transitions. [2021-03-10 21:23:20,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:20,707 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1063 transitions. [2021-03-10 21:23:20,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:23:20,707 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:20,708 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:20,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:20,928 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:20,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:20,928 INFO L82 PathProgramCache]: Analyzing trace with hash 464010127, now seen corresponding path program 33 times [2021-03-10 21:23:20,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:20,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442889091] [2021-03-10 21:23:20,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:20,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:20,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:20,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442889091] [2021-03-10 21:23:20,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382930446] [2021-03-10 21:23:20,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:21,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:23:21,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:21,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:21,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:21,045 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:21,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:21,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:23:21,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454009517] [2021-03-10 21:23:21,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:23:21,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:21,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:23:21,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:21,047 INFO L87 Difference]: Start difference. First operand 362 states and 1063 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:21,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:21,109 INFO L93 Difference]: Finished difference Result 535 states and 1337 transitions. [2021-03-10 21:23:21,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:23:21,109 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:23:21,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:21,111 INFO L225 Difference]: With dead ends: 535 [2021-03-10 21:23:21,111 INFO L226 Difference]: Without dead ends: 535 [2021-03-10 21:23:21,112 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 54.0ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:21,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-03-10 21:23:21,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 337. [2021-03-10 21:23:21,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.8988095238095237) internal successors, (974), 336 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:21,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 974 transitions. [2021-03-10 21:23:21,122 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 974 transitions. Word has length 16 [2021-03-10 21:23:21,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:21,122 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 974 transitions. [2021-03-10 21:23:21,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:21,122 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 974 transitions. [2021-03-10 21:23:21,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:23:21,123 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:21,123 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:21,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-03-10 21:23:21,345 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:21,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:21,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1104154371, now seen corresponding path program 34 times [2021-03-10 21:23:21,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:21,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724527600] [2021-03-10 21:23:21,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:21,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:21,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:21,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724527600] [2021-03-10 21:23:21,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049175774] [2021-03-10 21:23:21,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:23:21,406 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:21,406 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:21,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:21,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:21,436 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:21,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:21,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:23:21,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850054293] [2021-03-10 21:23:21,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:23:21,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:21,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:23:21,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:23:21,438 INFO L87 Difference]: Start difference. First operand 337 states and 974 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:21,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:21,519 INFO L93 Difference]: Finished difference Result 456 states and 1159 transitions. [2021-03-10 21:23:21,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:23:21,520 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:23:21,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:21,521 INFO L225 Difference]: With dead ends: 456 [2021-03-10 21:23:21,522 INFO L226 Difference]: Without dead ends: 454 [2021-03-10 21:23:21,522 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:21,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-03-10 21:23:21,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 348. [2021-03-10 21:23:21,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.893371757925072) internal successors, (1004), 347 states have internal predecessors, (1004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:21,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 1004 transitions. [2021-03-10 21:23:21,531 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 1004 transitions. Word has length 16 [2021-03-10 21:23:21,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:21,531 INFO L480 AbstractCegarLoop]: Abstraction has 348 states and 1004 transitions. [2021-03-10 21:23:21,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:21,531 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 1004 transitions. [2021-03-10 21:23:21,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:23:21,532 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:21,532 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:21,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:21,752 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:21,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:21,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1473063865, now seen corresponding path program 35 times [2021-03-10 21:23:21,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:21,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402174964] [2021-03-10 21:23:21,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:21,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:21,790 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:21,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402174964] [2021-03-10 21:23:21,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405452585] [2021-03-10 21:23:21,790 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:23:21,831 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:23:21,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:21,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:21,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:21,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:21,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:21,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:23:21,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831008033] [2021-03-10 21:23:21,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:23:21,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:21,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:23:21,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:23:21,868 INFO L87 Difference]: Start difference. First operand 348 states and 1004 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:21,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:21,908 INFO L93 Difference]: Finished difference Result 447 states and 1123 transitions. [2021-03-10 21:23:21,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:23:21,909 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:23:21,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:21,910 INFO L225 Difference]: With dead ends: 447 [2021-03-10 21:23:21,910 INFO L226 Difference]: Without dead ends: 447 [2021-03-10 21:23:21,910 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:21,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-03-10 21:23:21,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 336. [2021-03-10 21:23:21,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.8656716417910446) internal successors, (960), 335 states have internal predecessors, (960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:21,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 960 transitions. [2021-03-10 21:23:21,918 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 960 transitions. Word has length 16 [2021-03-10 21:23:21,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:21,919 INFO L480 AbstractCegarLoop]: Abstraction has 336 states and 960 transitions. [2021-03-10 21:23:21,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:21,919 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 960 transitions. [2021-03-10 21:23:21,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:23:21,919 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:21,920 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:22,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-03-10 21:23:22,141 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:22,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:22,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1092856097, now seen corresponding path program 36 times [2021-03-10 21:23:22,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:22,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453006939] [2021-03-10 21:23:22,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:22,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:22,198 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:22,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453006939] [2021-03-10 21:23:22,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161258607] [2021-03-10 21:23:22,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:22,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:23:22,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:22,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:22,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:22,255 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:22,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:22,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:23:22,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207136057] [2021-03-10 21:23:22,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:23:22,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:22,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:23:22,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:22,256 INFO L87 Difference]: Start difference. First operand 336 states and 960 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:22,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:22,320 INFO L93 Difference]: Finished difference Result 482 states and 1184 transitions. [2021-03-10 21:23:22,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:23:22,320 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:23:22,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:22,322 INFO L225 Difference]: With dead ends: 482 [2021-03-10 21:23:22,322 INFO L226 Difference]: Without dead ends: 482 [2021-03-10 21:23:22,322 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:22,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-03-10 21:23:22,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 310. [2021-03-10 21:23:22,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.822006472491909) internal successors, (872), 309 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:22,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 872 transitions. [2021-03-10 21:23:22,330 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 872 transitions. Word has length 16 [2021-03-10 21:23:22,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:22,330 INFO L480 AbstractCegarLoop]: Abstraction has 310 states and 872 transitions. [2021-03-10 21:23:22,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:22,330 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 872 transitions. [2021-03-10 21:23:22,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:23:22,331 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:22,331 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:22,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-03-10 21:23:22,547 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:22,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:22,547 INFO L82 PathProgramCache]: Analyzing trace with hash -968003705, now seen corresponding path program 37 times [2021-03-10 21:23:22,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:22,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910358390] [2021-03-10 21:23:22,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:22,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:22,584 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:22,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910358390] [2021-03-10 21:23:22,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343123103] [2021-03-10 21:23:22,584 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:22,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:22,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:22,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:22,643 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:22,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:22,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:23:22,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64399348] [2021-03-10 21:23:22,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:23:22,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:22,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:23:22,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:22,645 INFO L87 Difference]: Start difference. First operand 310 states and 872 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:22,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:22,743 INFO L93 Difference]: Finished difference Result 536 states and 1380 transitions. [2021-03-10 21:23:22,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:23:22,743 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:23:22,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:22,745 INFO L225 Difference]: With dead ends: 536 [2021-03-10 21:23:22,745 INFO L226 Difference]: Without dead ends: 536 [2021-03-10 21:23:22,745 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 70.5ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:23:22,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2021-03-10 21:23:22,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 382. [2021-03-10 21:23:22,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 381 states have (on average 2.9448818897637796) internal successors, (1122), 381 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:22,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 1122 transitions. [2021-03-10 21:23:22,754 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 1122 transitions. Word has length 16 [2021-03-10 21:23:22,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:22,754 INFO L480 AbstractCegarLoop]: Abstraction has 382 states and 1122 transitions. [2021-03-10 21:23:22,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:22,754 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 1122 transitions. [2021-03-10 21:23:22,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:23:22,755 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:22,755 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:22,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:22,977 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:22,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:22,977 INFO L82 PathProgramCache]: Analyzing trace with hash -557719857, now seen corresponding path program 38 times [2021-03-10 21:23:22,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:22,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060514297] [2021-03-10 21:23:22,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:22,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:23,013 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:23,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060514297] [2021-03-10 21:23:23,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408220065] [2021-03-10 21:23:23,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:23,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:23,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:23,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:23,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:23,072 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:23,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:23,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:23:23,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672920237] [2021-03-10 21:23:23,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:23:23,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:23,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:23:23,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:23:23,073 INFO L87 Difference]: Start difference. First operand 382 states and 1122 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:23,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:23,175 INFO L93 Difference]: Finished difference Result 493 states and 1315 transitions. [2021-03-10 21:23:23,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:23:23,175 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:23:23,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:23,177 INFO L225 Difference]: With dead ends: 493 [2021-03-10 21:23:23,178 INFO L226 Difference]: Without dead ends: 489 [2021-03-10 21:23:23,178 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:23:23,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-03-10 21:23:23,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 406. [2021-03-10 21:23:23,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 2.9703703703703703) internal successors, (1203), 405 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:23,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1203 transitions. [2021-03-10 21:23:23,186 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1203 transitions. Word has length 16 [2021-03-10 21:23:23,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:23,186 INFO L480 AbstractCegarLoop]: Abstraction has 406 states and 1203 transitions. [2021-03-10 21:23:23,186 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:23,186 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1203 transitions. [2021-03-10 21:23:23,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:23:23,187 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:23,187 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:23,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-03-10 21:23:23,409 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:23,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:23,409 INFO L82 PathProgramCache]: Analyzing trace with hash 1852698447, now seen corresponding path program 39 times [2021-03-10 21:23:23,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:23,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074579235] [2021-03-10 21:23:23,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:23,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:23,453 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:23,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074579235] [2021-03-10 21:23:23,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620937422] [2021-03-10 21:23:23,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:23,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:23:23,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:23,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:23,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:23,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:23,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:23,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:23:23,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290089392] [2021-03-10 21:23:23,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:23:23,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:23,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:23:23,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:23,503 INFO L87 Difference]: Start difference. First operand 406 states and 1203 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:23,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:23,594 INFO L93 Difference]: Finished difference Result 566 states and 1493 transitions. [2021-03-10 21:23:23,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:23:23,594 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:23:23,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:23,596 INFO L225 Difference]: With dead ends: 566 [2021-03-10 21:23:23,596 INFO L226 Difference]: Without dead ends: 566 [2021-03-10 21:23:23,596 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:23:23,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-03-10 21:23:23,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 372. [2021-03-10 21:23:23,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 371 states have (on average 2.91644204851752) internal successors, (1082), 371 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:23,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 1082 transitions. [2021-03-10 21:23:23,604 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 1082 transitions. Word has length 16 [2021-03-10 21:23:23,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:23,605 INFO L480 AbstractCegarLoop]: Abstraction has 372 states and 1082 transitions. [2021-03-10 21:23:23,605 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:23,605 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 1082 transitions. [2021-03-10 21:23:23,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:23:23,606 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:23,606 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:23,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:23,823 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:23,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:23,823 INFO L82 PathProgramCache]: Analyzing trace with hash -876457039, now seen corresponding path program 40 times [2021-03-10 21:23:23,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:23,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919831212] [2021-03-10 21:23:23,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:23,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:23,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:23,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919831212] [2021-03-10 21:23:23,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513921138] [2021-03-10 21:23:23,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:23,898 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:23,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:23,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:23,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:23,927 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:23,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:23,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:23:23,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499068684] [2021-03-10 21:23:23,928 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:23:23,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:23,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:23:23,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:23:23,929 INFO L87 Difference]: Start difference. First operand 372 states and 1082 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:24,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:24,014 INFO L93 Difference]: Finished difference Result 471 states and 1219 transitions. [2021-03-10 21:23:24,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:23:24,015 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:23:24,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:24,017 INFO L225 Difference]: With dead ends: 471 [2021-03-10 21:23:24,017 INFO L226 Difference]: Without dead ends: 467 [2021-03-10 21:23:24,017 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 56.4ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:24,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2021-03-10 21:23:24,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 379. [2021-03-10 21:23:24,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 2.9153439153439153) internal successors, (1102), 378 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:24,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 1102 transitions. [2021-03-10 21:23:24,025 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 1102 transitions. Word has length 16 [2021-03-10 21:23:24,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:24,025 INFO L480 AbstractCegarLoop]: Abstraction has 379 states and 1102 transitions. [2021-03-10 21:23:24,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:24,025 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 1102 transitions. [2021-03-10 21:23:24,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:23:24,026 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:24,026 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:24,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:24,247 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:24,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:24,247 INFO L82 PathProgramCache]: Analyzing trace with hash 841292021, now seen corresponding path program 41 times [2021-03-10 21:23:24,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:24,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908941910] [2021-03-10 21:23:24,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:24,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:24,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908941910] [2021-03-10 21:23:24,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631997861] [2021-03-10 21:23:24,285 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:24,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:23:24,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:24,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:24,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:24,348 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:24,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:24,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:23:24,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070828246] [2021-03-10 21:23:24,349 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:23:24,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:24,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:23:24,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:23:24,350 INFO L87 Difference]: Start difference. First operand 379 states and 1102 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:24,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:24,396 INFO L93 Difference]: Finished difference Result 489 states and 1264 transitions. [2021-03-10 21:23:24,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:23:24,397 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:23:24,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:24,398 INFO L225 Difference]: With dead ends: 489 [2021-03-10 21:23:24,398 INFO L226 Difference]: Without dead ends: 489 [2021-03-10 21:23:24,398 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 40.4ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:24,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-03-10 21:23:24,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 380. [2021-03-10 21:23:24,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 379 states have (on average 2.9155672823219) internal successors, (1105), 379 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:24,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 1105 transitions. [2021-03-10 21:23:24,407 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 1105 transitions. Word has length 16 [2021-03-10 21:23:24,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:24,407 INFO L480 AbstractCegarLoop]: Abstraction has 380 states and 1105 transitions. [2021-03-10 21:23:24,407 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:24,407 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 1105 transitions. [2021-03-10 21:23:24,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:23:24,408 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:24,408 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:24,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:24,629 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:24,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:24,629 INFO L82 PathProgramCache]: Analyzing trace with hash -887755313, now seen corresponding path program 42 times [2021-03-10 21:23:24,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:24,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964304034] [2021-03-10 21:23:24,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:24,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:24,661 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:24,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964304034] [2021-03-10 21:23:24,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418553287] [2021-03-10 21:23:24,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:24,689 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:23:24,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:24,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:24,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:24,723 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:24,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:24,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-03-10 21:23:24,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245303968] [2021-03-10 21:23:24,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:23:24,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:24,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:23:24,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:24,724 INFO L87 Difference]: Start difference. First operand 380 states and 1105 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:24,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:24,768 INFO L93 Difference]: Finished difference Result 456 states and 1186 transitions. [2021-03-10 21:23:24,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:23:24,768 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:23:24,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:24,769 INFO L225 Difference]: With dead ends: 456 [2021-03-10 21:23:24,769 INFO L226 Difference]: Without dead ends: 456 [2021-03-10 21:23:24,769 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 41.2ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:24,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2021-03-10 21:23:24,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 359. [2021-03-10 21:23:24,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 2.8910614525139664) internal successors, (1035), 358 states have internal predecessors, (1035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:24,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 1035 transitions. [2021-03-10 21:23:24,776 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 1035 transitions. Word has length 16 [2021-03-10 21:23:24,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:24,777 INFO L480 AbstractCegarLoop]: Abstraction has 359 states and 1035 transitions. [2021-03-10 21:23:24,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:24,777 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 1035 transitions. [2021-03-10 21:23:24,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:23:24,777 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:24,778 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:24,991 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:24,991 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:24,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:24,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1346352181, now seen corresponding path program 43 times [2021-03-10 21:23:24,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:24,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478553533] [2021-03-10 21:23:24,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:24,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:25,033 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:25,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478553533] [2021-03-10 21:23:25,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739751016] [2021-03-10 21:23:25,033 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:25,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:25,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:25,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:25,102 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:25,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:25,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:23:25,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485258407] [2021-03-10 21:23:25,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:25,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:25,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:25,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:25,103 INFO L87 Difference]: Start difference. First operand 359 states and 1035 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:25,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:25,187 INFO L93 Difference]: Finished difference Result 466 states and 1194 transitions. [2021-03-10 21:23:25,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:23:25,188 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:23:25,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:25,189 INFO L225 Difference]: With dead ends: 466 [2021-03-10 21:23:25,189 INFO L226 Difference]: Without dead ends: 466 [2021-03-10 21:23:25,189 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 71.0ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:23:25,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2021-03-10 21:23:25,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 341. [2021-03-10 21:23:25,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 2.864705882352941) internal successors, (974), 340 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:25,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 974 transitions. [2021-03-10 21:23:25,195 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 974 transitions. Word has length 16 [2021-03-10 21:23:25,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:25,195 INFO L480 AbstractCegarLoop]: Abstraction has 341 states and 974 transitions. [2021-03-10 21:23:25,195 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:25,196 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 974 transitions. [2021-03-10 21:23:25,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:23:25,196 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:25,196 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:25,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2021-03-10 21:23:25,417 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:25,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:25,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1884207759, now seen corresponding path program 44 times [2021-03-10 21:23:25,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:25,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291595775] [2021-03-10 21:23:25,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:25,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:25,466 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:25,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291595775] [2021-03-10 21:23:25,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203304472] [2021-03-10 21:23:25,466 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:25,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:25,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:25,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:25,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:25,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:25,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:25,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-03-10 21:23:25,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755359421] [2021-03-10 21:23:25,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:25,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:25,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:25,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:25,528 INFO L87 Difference]: Start difference. First operand 341 states and 974 transitions. Second operand has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:25,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:25,657 INFO L93 Difference]: Finished difference Result 533 states and 1377 transitions. [2021-03-10 21:23:25,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:23:25,658 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:23:25,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:25,660 INFO L225 Difference]: With dead ends: 533 [2021-03-10 21:23:25,660 INFO L226 Difference]: Without dead ends: 533 [2021-03-10 21:23:25,660 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:23:25,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-03-10 21:23:25,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 403. [2021-03-10 21:23:25,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.9203980099502487) internal successors, (1174), 402 states have internal predecessors, (1174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:25,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1174 transitions. [2021-03-10 21:23:25,668 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1174 transitions. Word has length 16 [2021-03-10 21:23:25,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:25,668 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 1174 transitions. [2021-03-10 21:23:25,668 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.7272727272727273) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:25,668 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1174 transitions. [2021-03-10 21:23:25,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:23:25,669 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:25,669 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:25,891 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:25,891 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:25,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:25,891 INFO L82 PathProgramCache]: Analyzing trace with hash 984700935, now seen corresponding path program 45 times [2021-03-10 21:23:25,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:25,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189751943] [2021-03-10 21:23:25,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:25,944 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:25,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189751943] [2021-03-10 21:23:25,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764239243] [2021-03-10 21:23:25,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:25,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:23:25,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:25,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:25,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:26,019 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:26,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:26,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-03-10 21:23:26,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703392300] [2021-03-10 21:23:26,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:26,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:26,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:26,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:26,021 INFO L87 Difference]: Start difference. First operand 403 states and 1174 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:26,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:26,150 INFO L93 Difference]: Finished difference Result 489 states and 1285 transitions. [2021-03-10 21:23:26,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:23:26,151 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:23:26,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:26,152 INFO L225 Difference]: With dead ends: 489 [2021-03-10 21:23:26,152 INFO L226 Difference]: Without dead ends: 485 [2021-03-10 21:23:26,152 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:23:26,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2021-03-10 21:23:26,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 391. [2021-03-10 21:23:26,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 390 states have (on average 2.9) internal successors, (1131), 390 states have internal predecessors, (1131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:26,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 1131 transitions. [2021-03-10 21:23:26,160 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 1131 transitions. Word has length 16 [2021-03-10 21:23:26,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:26,160 INFO L480 AbstractCegarLoop]: Abstraction has 391 states and 1131 transitions. [2021-03-10 21:23:26,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:26,160 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 1131 transitions. [2021-03-10 21:23:26,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:23:26,161 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:26,161 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:26,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-03-10 21:23:26,375 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:26,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:26,376 INFO L82 PathProgramCache]: Analyzing trace with hash -868338745, now seen corresponding path program 46 times [2021-03-10 21:23:26,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:26,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281691629] [2021-03-10 21:23:26,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:26,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:26,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:26,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281691629] [2021-03-10 21:23:26,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091130371] [2021-03-10 21:23:26,433 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:26,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:26,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:26,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:26,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:26,502 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:26,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:26,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-03-10 21:23:26,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316677378] [2021-03-10 21:23:26,502 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:26,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:26,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:26,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:26,503 INFO L87 Difference]: Start difference. First operand 391 states and 1131 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:26,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:26,660 INFO L93 Difference]: Finished difference Result 523 states and 1384 transitions. [2021-03-10 21:23:26,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:23:26,660 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:23:26,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:26,662 INFO L225 Difference]: With dead ends: 523 [2021-03-10 21:23:26,662 INFO L226 Difference]: Without dead ends: 523 [2021-03-10 21:23:26,662 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 149.4ms TimeCoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:23:26,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-03-10 21:23:26,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 386. [2021-03-10 21:23:26,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.8935064935064934) internal successors, (1114), 385 states have internal predecessors, (1114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:26,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 1114 transitions. [2021-03-10 21:23:26,670 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 1114 transitions. Word has length 16 [2021-03-10 21:23:26,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:26,670 INFO L480 AbstractCegarLoop]: Abstraction has 386 states and 1114 transitions. [2021-03-10 21:23:26,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:26,670 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 1114 transitions. [2021-03-10 21:23:26,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:23:26,671 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:26,671 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:26,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:26,892 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:26,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:26,893 INFO L82 PathProgramCache]: Analyzing trace with hash -2145868605, now seen corresponding path program 47 times [2021-03-10 21:23:26,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:26,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270542094] [2021-03-10 21:23:26,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:26,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:26,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:26,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270542094] [2021-03-10 21:23:26,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907333759] [2021-03-10 21:23:26,937 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:26,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:23:26,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:26,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:26,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:26,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:26,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2021-03-10 21:23:26,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682006801] [2021-03-10 21:23:26,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:26,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:26,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:26,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:26,994 INFO L87 Difference]: Start difference. First operand 386 states and 1114 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:27,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:27,089 INFO L93 Difference]: Finished difference Result 454 states and 1208 transitions. [2021-03-10 21:23:27,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:23:27,089 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:23:27,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:27,091 INFO L225 Difference]: With dead ends: 454 [2021-03-10 21:23:27,091 INFO L226 Difference]: Without dead ends: 452 [2021-03-10 21:23:27,091 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:23:27,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2021-03-10 21:23:27,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 395. [2021-03-10 21:23:27,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 394 states have (on average 2.8984771573604062) internal successors, (1142), 394 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:27,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 1142 transitions. [2021-03-10 21:23:27,097 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 1142 transitions. Word has length 16 [2021-03-10 21:23:27,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:27,097 INFO L480 AbstractCegarLoop]: Abstraction has 395 states and 1142 transitions. [2021-03-10 21:23:27,097 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:27,097 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 1142 transitions. [2021-03-10 21:23:27,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:23:27,098 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:27,098 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:27,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:27,319 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:27,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:27,319 INFO L82 PathProgramCache]: Analyzing trace with hash -428119545, now seen corresponding path program 48 times [2021-03-10 21:23:27,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:27,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846368397] [2021-03-10 21:23:27,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:27,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:27,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:27,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846368397] [2021-03-10 21:23:27,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289926960] [2021-03-10 21:23:27,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:27,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:23:27,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:27,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:27,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:27,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:27,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2021-03-10 21:23:27,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284463594] [2021-03-10 21:23:27,427 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:27,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:27,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:27,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:27,427 INFO L87 Difference]: Start difference. First operand 395 states and 1142 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:27,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:27,504 INFO L93 Difference]: Finished difference Result 476 states and 1251 transitions. [2021-03-10 21:23:27,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:23:27,504 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:23:27,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:27,506 INFO L225 Difference]: With dead ends: 476 [2021-03-10 21:23:27,506 INFO L226 Difference]: Without dead ends: 476 [2021-03-10 21:23:27,506 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 77.2ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:23:27,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-03-10 21:23:27,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 396. [2021-03-10 21:23:27,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.8936708860759492) internal successors, (1143), 395 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:27,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 1143 transitions. [2021-03-10 21:23:27,512 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 1143 transitions. Word has length 16 [2021-03-10 21:23:27,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:27,512 INFO L480 AbstractCegarLoop]: Abstraction has 396 states and 1143 transitions. [2021-03-10 21:23:27,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:27,512 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 1143 transitions. [2021-03-10 21:23:27,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:23:27,513 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:27,513 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:27,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-03-10 21:23:27,713 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:27,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:27,713 INFO L82 PathProgramCache]: Analyzing trace with hash 2137800417, now seen corresponding path program 49 times [2021-03-10 21:23:27,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:27,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010370418] [2021-03-10 21:23:27,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:27,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:27,774 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:27,774 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010370418] [2021-03-10 21:23:27,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836496485] [2021-03-10 21:23:27,775 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:23:27,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:27,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:27,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:27,844 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:27,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:27,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-03-10 21:23:27,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016847904] [2021-03-10 21:23:27,845 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:27,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:27,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:27,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:27,846 INFO L87 Difference]: Start difference. First operand 396 states and 1143 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:27,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:27,931 INFO L93 Difference]: Finished difference Result 482 states and 1265 transitions. [2021-03-10 21:23:27,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:23:27,931 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:23:27,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:27,932 INFO L225 Difference]: With dead ends: 482 [2021-03-10 21:23:27,932 INFO L226 Difference]: Without dead ends: 482 [2021-03-10 21:23:27,933 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 97.4ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:23:27,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-03-10 21:23:27,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 397. [2021-03-10 21:23:27,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 396 states have (on average 2.893939393939394) internal successors, (1146), 396 states have internal predecessors, (1146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:27,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 1146 transitions. [2021-03-10 21:23:27,939 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 1146 transitions. Word has length 16 [2021-03-10 21:23:27,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:27,939 INFO L480 AbstractCegarLoop]: Abstraction has 397 states and 1146 transitions. [2021-03-10 21:23:27,939 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:27,939 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 1146 transitions. [2021-03-10 21:23:27,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:23:27,940 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:27,940 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:28,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:28,155 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:28,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:28,155 INFO L82 PathProgramCache]: Analyzing trace with hash 76940615, now seen corresponding path program 50 times [2021-03-10 21:23:28,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:28,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464367936] [2021-03-10 21:23:28,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:28,222 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:28,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464367936] [2021-03-10 21:23:28,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512170231] [2021-03-10 21:23:28,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:28,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:28,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:28,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:28,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:28,297 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:28,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:28,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-03-10 21:23:28,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371039064] [2021-03-10 21:23:28,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:28,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:28,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:28,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:28,298 INFO L87 Difference]: Start difference. First operand 397 states and 1146 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:28,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:28,427 INFO L93 Difference]: Finished difference Result 476 states and 1290 transitions. [2021-03-10 21:23:28,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:23:28,428 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:23:28,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:28,429 INFO L225 Difference]: With dead ends: 476 [2021-03-10 21:23:28,429 INFO L226 Difference]: Without dead ends: 476 [2021-03-10 21:23:28,430 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 121.9ms TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:23:28,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-03-10 21:23:28,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 420. [2021-03-10 21:23:28,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.911694510739857) internal successors, (1220), 419 states have internal predecessors, (1220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:28,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1220 transitions. [2021-03-10 21:23:28,436 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1220 transitions. Word has length 16 [2021-03-10 21:23:28,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:28,437 INFO L480 AbstractCegarLoop]: Abstraction has 420 states and 1220 transitions. [2021-03-10 21:23:28,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:28,437 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1220 transitions. [2021-03-10 21:23:28,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:23:28,437 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:28,438 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:28,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-03-10 21:23:28,651 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:28,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:28,651 INFO L82 PathProgramCache]: Analyzing trace with hash 614796193, now seen corresponding path program 51 times [2021-03-10 21:23:28,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:28,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303411298] [2021-03-10 21:23:28,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:28,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:28,708 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:28,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303411298] [2021-03-10 21:23:28,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262620064] [2021-03-10 21:23:28,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:28,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:23:28,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:28,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:28,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:28,776 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:28,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:28,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-03-10 21:23:28,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191422848] [2021-03-10 21:23:28,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:28,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:28,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:28,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:28,777 INFO L87 Difference]: Start difference. First operand 420 states and 1220 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:28,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:28,900 INFO L93 Difference]: Finished difference Result 486 states and 1311 transitions. [2021-03-10 21:23:28,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:23:28,901 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:23:28,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:28,903 INFO L225 Difference]: With dead ends: 486 [2021-03-10 21:23:28,903 INFO L226 Difference]: Without dead ends: 486 [2021-03-10 21:23:28,903 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 123.6ms TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:23:28,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-03-10 21:23:28,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 416. [2021-03-10 21:23:28,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 415 states have (on average 2.908433734939759) internal successors, (1207), 415 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:28,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 1207 transitions. [2021-03-10 21:23:28,910 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 1207 transitions. Word has length 16 [2021-03-10 21:23:28,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:28,910 INFO L480 AbstractCegarLoop]: Abstraction has 416 states and 1207 transitions. [2021-03-10 21:23:28,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:28,910 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 1207 transitions. [2021-03-10 21:23:28,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 21:23:28,911 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:28,911 INFO L519 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:29,115 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-03-10 21:23:29,116 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:29,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:29,116 INFO L82 PathProgramCache]: Analyzing trace with hash 108449927, now seen corresponding path program 52 times [2021-03-10 21:23:29,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:29,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783688787] [2021-03-10 21:23:29,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:29,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:29,166 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:29,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783688787] [2021-03-10 21:23:29,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306757211] [2021-03-10 21:23:29,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:29,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:29,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:29,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:29,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:29,243 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:29,243 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:29,243 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-03-10 21:23:29,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318052328] [2021-03-10 21:23:29,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:23:29,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:29,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:23:29,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:29,244 INFO L87 Difference]: Start difference. First operand 416 states and 1207 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:29,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:29,458 INFO L93 Difference]: Finished difference Result 533 states and 1453 transitions. [2021-03-10 21:23:29,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:23:29,459 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 21:23:29,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:29,461 INFO L225 Difference]: With dead ends: 533 [2021-03-10 21:23:29,461 INFO L226 Difference]: Without dead ends: 533 [2021-03-10 21:23:29,461 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 198.4ms TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:23:29,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-03-10 21:23:29,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 424. [2021-03-10 21:23:29,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 2.9125295508274234) internal successors, (1232), 423 states have internal predecessors, (1232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:29,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 1232 transitions. [2021-03-10 21:23:29,467 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 1232 transitions. Word has length 16 [2021-03-10 21:23:29,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:29,467 INFO L480 AbstractCegarLoop]: Abstraction has 424 states and 1232 transitions. [2021-03-10 21:23:29,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:29,468 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 1232 transitions. [2021-03-10 21:23:29,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:23:29,468 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:29,469 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:29,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-03-10 21:23:29,687 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:29,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:29,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1580915834, now seen corresponding path program 53 times [2021-03-10 21:23:29,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:29,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991927580] [2021-03-10 21:23:29,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:29,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:29,738 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:29,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991927580] [2021-03-10 21:23:29,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807512514] [2021-03-10 21:23:29,738 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:29,756 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:23:29,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:29,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:29,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:29,806 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:29,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:29,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-03-10 21:23:29,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985183773] [2021-03-10 21:23:29,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:23:29,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:29,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:23:29,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:23:29,807 INFO L87 Difference]: Start difference. First operand 424 states and 1232 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:29,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:29,930 INFO L93 Difference]: Finished difference Result 523 states and 1364 transitions. [2021-03-10 21:23:29,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:23:29,931 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:23:29,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:29,932 INFO L225 Difference]: With dead ends: 523 [2021-03-10 21:23:29,932 INFO L226 Difference]: Without dead ends: 517 [2021-03-10 21:23:29,932 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 128.6ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:23:29,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-03-10 21:23:29,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 417. [2021-03-10 21:23:29,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.8774038461538463) internal successors, (1197), 416 states have internal predecessors, (1197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:29,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1197 transitions. [2021-03-10 21:23:29,937 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1197 transitions. Word has length 17 [2021-03-10 21:23:29,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:29,937 INFO L480 AbstractCegarLoop]: Abstraction has 417 states and 1197 transitions. [2021-03-10 21:23:29,937 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:29,937 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1197 transitions. [2021-03-10 21:23:29,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:23:29,938 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:29,938 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:30,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-03-10 21:23:30,138 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:30,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:30,139 INFO L82 PathProgramCache]: Analyzing trace with hash 237372592, now seen corresponding path program 54 times [2021-03-10 21:23:30,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:30,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616313307] [2021-03-10 21:23:30,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:30,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:30,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616313307] [2021-03-10 21:23:30,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829502349] [2021-03-10 21:23:30,178 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:30,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:23:30,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:30,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:23:30,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:30,240 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:30,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:30,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:23:30,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912884047] [2021-03-10 21:23:30,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:23:30,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:30,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:23:30,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:30,241 INFO L87 Difference]: Start difference. First operand 417 states and 1197 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:30,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:30,329 INFO L93 Difference]: Finished difference Result 436 states and 1230 transitions. [2021-03-10 21:23:30,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:23:30,330 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:23:30,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:30,331 INFO L225 Difference]: With dead ends: 436 [2021-03-10 21:23:30,331 INFO L226 Difference]: Without dead ends: 434 [2021-03-10 21:23:30,332 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:23:30,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-03-10 21:23:30,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 417. [2021-03-10 21:23:30,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417 states, 416 states have (on average 2.8677884615384617) internal successors, (1193), 416 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:30,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 1193 transitions. [2021-03-10 21:23:30,338 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 1193 transitions. Word has length 17 [2021-03-10 21:23:30,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:30,338 INFO L480 AbstractCegarLoop]: Abstraction has 417 states and 1193 transitions. [2021-03-10 21:23:30,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:30,338 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 1193 transitions. [2021-03-10 21:23:30,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:23:30,339 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:30,339 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:30,561 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:30,562 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:30,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:30,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1705117860, now seen corresponding path program 55 times [2021-03-10 21:23:30,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:30,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398866801] [2021-03-10 21:23:30,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:30,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:30,598 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:30,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398866801] [2021-03-10 21:23:30,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993632937] [2021-03-10 21:23:30,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:23:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:30,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:23:30,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:30,670 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:23:30,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:30,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-03-10 21:23:30,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760963765] [2021-03-10 21:23:30,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:23:30,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:30,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:23:30,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:23:30,671 INFO L87 Difference]: Start difference. First operand 417 states and 1193 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:30,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:30,712 INFO L93 Difference]: Finished difference Result 505 states and 1323 transitions. [2021-03-10 21:23:30,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:23:30,713 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:23:30,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:30,714 INFO L225 Difference]: With dead ends: 505 [2021-03-10 21:23:30,714 INFO L226 Difference]: Without dead ends: 503 [2021-03-10 21:23:30,715 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 40.8ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:30,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-03-10 21:23:30,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 420. [2021-03-10 21:23:30,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.863961813842482) internal successors, (1200), 419 states have internal predecessors, (1200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:30,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1200 transitions. [2021-03-10 21:23:30,721 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1200 transitions. Word has length 17 [2021-03-10 21:23:30,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:30,721 INFO L480 AbstractCegarLoop]: Abstraction has 420 states and 1200 transitions. [2021-03-10 21:23:30,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 8 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:30,721 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1200 transitions. [2021-03-10 21:23:30,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:23:30,722 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:30,722 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:30,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-03-10 21:23:30,927 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:30,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:30,927 INFO L82 PathProgramCache]: Analyzing trace with hash -844394746, now seen corresponding path program 56 times [2021-03-10 21:23:30,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:30,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145431720] [2021-03-10 21:23:30,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:30,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:30,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145431720] [2021-03-10 21:23:30,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265381166] [2021-03-10 21:23:30,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:23:30,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:30,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:30,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:30,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:31,031 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:23:31,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:31,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-03-10 21:23:31,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842850897] [2021-03-10 21:23:31,031 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:23:31,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:31,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:23:31,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:31,032 INFO L87 Difference]: Start difference. First operand 420 states and 1200 transitions. Second operand has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:31,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:31,103 INFO L93 Difference]: Finished difference Result 516 states and 1337 transitions. [2021-03-10 21:23:31,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:23:31,103 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:23:31,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:31,117 INFO L225 Difference]: With dead ends: 516 [2021-03-10 21:23:31,117 INFO L226 Difference]: Without dead ends: 515 [2021-03-10 21:23:31,117 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 57.8ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:31,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2021-03-10 21:23:31,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 415. [2021-03-10 21:23:31,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 414 states have (on average 2.845410628019324) internal successors, (1178), 414 states have internal predecessors, (1178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:31,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 1178 transitions. [2021-03-10 21:23:31,124 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 1178 transitions. Word has length 17 [2021-03-10 21:23:31,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:31,124 INFO L480 AbstractCegarLoop]: Abstraction has 415 states and 1178 transitions. [2021-03-10 21:23:31,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.2) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:31,124 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 1178 transitions. [2021-03-10 21:23:31,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:23:31,125 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:31,125 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:31,325 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:31,325 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:31,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:31,326 INFO L82 PathProgramCache]: Analyzing trace with hash 866218562, now seen corresponding path program 57 times [2021-03-10 21:23:31,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:31,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031572626] [2021-03-10 21:23:31,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:31,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:31,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031572626] [2021-03-10 21:23:31,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958530803] [2021-03-10 21:23:31,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:31,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:23:31,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:31,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:23:31,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:31,419 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:31,419 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:31,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:23:31,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519269203] [2021-03-10 21:23:31,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:23:31,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:31,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:23:31,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:31,420 INFO L87 Difference]: Start difference. First operand 415 states and 1178 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:31,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:31,497 INFO L93 Difference]: Finished difference Result 503 states and 1301 transitions. [2021-03-10 21:23:31,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:23:31,497 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:23:31,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:31,498 INFO L225 Difference]: With dead ends: 503 [2021-03-10 21:23:31,499 INFO L226 Difference]: Without dead ends: 500 [2021-03-10 21:23:31,499 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 65.8ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:23:31,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2021-03-10 21:23:31,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 412. [2021-03-10 21:23:31,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.834549878345499) internal successors, (1165), 411 states have internal predecessors, (1165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:31,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1165 transitions. [2021-03-10 21:23:31,503 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1165 transitions. Word has length 17 [2021-03-10 21:23:31,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:31,503 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 1165 transitions. [2021-03-10 21:23:31,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:31,503 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1165 transitions. [2021-03-10 21:23:31,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:23:31,504 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:31,504 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:31,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-03-10 21:23:31,705 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:31,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:31,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1939343738, now seen corresponding path program 58 times [2021-03-10 21:23:31,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:31,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408749077] [2021-03-10 21:23:31,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:31,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:31,749 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:31,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408749077] [2021-03-10 21:23:31,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367293944] [2021-03-10 21:23:31,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:31,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:31,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:31,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:31,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:31,805 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:31,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:31,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-03-10 21:23:31,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885545252] [2021-03-10 21:23:31,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:31,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:31,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:31,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:31,806 INFO L87 Difference]: Start difference. First operand 412 states and 1165 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:31,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:31,935 INFO L93 Difference]: Finished difference Result 478 states and 1266 transitions. [2021-03-10 21:23:31,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:23:31,935 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:23:31,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:31,936 INFO L225 Difference]: With dead ends: 478 [2021-03-10 21:23:31,936 INFO L226 Difference]: Without dead ends: 474 [2021-03-10 21:23:31,937 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:31,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2021-03-10 21:23:31,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 412. [2021-03-10 21:23:31,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 411 states have (on average 2.8223844282238444) internal successors, (1160), 411 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:31,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 1160 transitions. [2021-03-10 21:23:31,944 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 1160 transitions. Word has length 17 [2021-03-10 21:23:31,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:31,944 INFO L480 AbstractCegarLoop]: Abstraction has 412 states and 1160 transitions. [2021-03-10 21:23:31,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:31,944 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 1160 transitions. [2021-03-10 21:23:31,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:23:31,945 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:31,945 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:32,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:32,167 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:32,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:32,167 INFO L82 PathProgramCache]: Analyzing trace with hash -275493550, now seen corresponding path program 59 times [2021-03-10 21:23:32,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:32,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848939236] [2021-03-10 21:23:32,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:32,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:32,206 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:32,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848939236] [2021-03-10 21:23:32,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943045139] [2021-03-10 21:23:32,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:32,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:23:32,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:32,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:32,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:32,264 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:23:32,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:32,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-03-10 21:23:32,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748651146] [2021-03-10 21:23:32,265 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:23:32,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:32,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:23:32,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:32,265 INFO L87 Difference]: Start difference. First operand 412 states and 1160 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:32,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:32,325 INFO L93 Difference]: Finished difference Result 508 states and 1297 transitions. [2021-03-10 21:23:32,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:23:32,326 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:23:32,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:32,327 INFO L225 Difference]: With dead ends: 508 [2021-03-10 21:23:32,327 INFO L226 Difference]: Without dead ends: 506 [2021-03-10 21:23:32,327 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 43.2ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:32,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-03-10 21:23:32,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 409. [2021-03-10 21:23:32,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.7965686274509802) internal successors, (1141), 408 states have internal predecessors, (1141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:32,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1141 transitions. [2021-03-10 21:23:32,333 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1141 transitions. Word has length 17 [2021-03-10 21:23:32,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:32,333 INFO L480 AbstractCegarLoop]: Abstraction has 409 states and 1141 transitions. [2021-03-10 21:23:32,334 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:32,334 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1141 transitions. [2021-03-10 21:23:32,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:23:32,335 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:32,335 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:32,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-03-10 21:23:32,556 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:32,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:32,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1114392848, now seen corresponding path program 60 times [2021-03-10 21:23:32,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:32,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100003148] [2021-03-10 21:23:32,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:32,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:32,599 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 8 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:32,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100003148] [2021-03-10 21:23:32,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349856028] [2021-03-10 21:23:32,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:32,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:23:32,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:32,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:23:32,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:32,652 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:32,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:32,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:23:32,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834553265] [2021-03-10 21:23:32,653 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:23:32,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:32,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:23:32,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:32,654 INFO L87 Difference]: Start difference. First operand 409 states and 1141 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:32,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:32,748 INFO L93 Difference]: Finished difference Result 497 states and 1266 transitions. [2021-03-10 21:23:32,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:23:32,748 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:23:32,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:32,749 INFO L225 Difference]: With dead ends: 497 [2021-03-10 21:23:32,749 INFO L226 Difference]: Without dead ends: 494 [2021-03-10 21:23:32,750 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 65.0ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:23:32,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2021-03-10 21:23:32,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 403. [2021-03-10 21:23:32,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.7761194029850746) internal successors, (1116), 402 states have internal predecessors, (1116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:32,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1116 transitions. [2021-03-10 21:23:32,758 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1116 transitions. Word has length 17 [2021-03-10 21:23:32,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:32,758 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 1116 transitions. [2021-03-10 21:23:32,758 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:32,758 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1116 transitions. [2021-03-10 21:23:32,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:23:32,759 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:32,759 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:32,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:32,975 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:32,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:32,976 INFO L82 PathProgramCache]: Analyzing trace with hash 375012148, now seen corresponding path program 61 times [2021-03-10 21:23:32,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:32,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637418355] [2021-03-10 21:23:32,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:32,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:33,037 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:33,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637418355] [2021-03-10 21:23:33,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771865177] [2021-03-10 21:23:33,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:33,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:33,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:33,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:33,090 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:33,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:33,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-03-10 21:23:33,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043550668] [2021-03-10 21:23:33,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:33,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:33,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:33,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:33,091 INFO L87 Difference]: Start difference. First operand 403 states and 1116 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:33,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:33,202 INFO L93 Difference]: Finished difference Result 496 states and 1249 transitions. [2021-03-10 21:23:33,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:23:33,203 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:23:33,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:33,204 INFO L225 Difference]: With dead ends: 496 [2021-03-10 21:23:33,204 INFO L226 Difference]: Without dead ends: 492 [2021-03-10 21:23:33,204 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:23:33,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2021-03-10 21:23:33,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 403. [2021-03-10 21:23:33,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 403 states, 402 states have (on average 2.756218905472637) internal successors, (1108), 402 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:33,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 403 states to 403 states and 1108 transitions. [2021-03-10 21:23:33,211 INFO L78 Accepts]: Start accepts. Automaton has 403 states and 1108 transitions. Word has length 17 [2021-03-10 21:23:33,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:33,211 INFO L480 AbstractCegarLoop]: Abstraction has 403 states and 1108 transitions. [2021-03-10 21:23:33,211 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:33,211 INFO L276 IsEmpty]: Start isEmpty. Operand 403 states and 1108 transitions. [2021-03-10 21:23:33,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:23:33,211 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:33,212 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:33,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-03-10 21:23:33,434 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:33,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:33,434 INFO L82 PathProgramCache]: Analyzing trace with hash -698073232, now seen corresponding path program 62 times [2021-03-10 21:23:33,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:33,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713043725] [2021-03-10 21:23:33,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:33,488 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:33,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713043725] [2021-03-10 21:23:33,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982242] [2021-03-10 21:23:33,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:33,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:33,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:33,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:33,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:33,540 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 14 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:33,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:33,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-03-10 21:23:33,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897457607] [2021-03-10 21:23:33,540 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:33,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:33,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:33,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:33,541 INFO L87 Difference]: Start difference. First operand 403 states and 1108 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:33,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:33,637 INFO L93 Difference]: Finished difference Result 492 states and 1286 transitions. [2021-03-10 21:23:33,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:23:33,637 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:23:33,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:33,638 INFO L225 Difference]: With dead ends: 492 [2021-03-10 21:23:33,638 INFO L226 Difference]: Without dead ends: 486 [2021-03-10 21:23:33,638 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:23:33,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-03-10 21:23:33,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 404. [2021-03-10 21:23:33,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.7468982630272953) internal successors, (1107), 403 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:33,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 1107 transitions. [2021-03-10 21:23:33,642 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 1107 transitions. Word has length 17 [2021-03-10 21:23:33,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:33,642 INFO L480 AbstractCegarLoop]: Abstraction has 404 states and 1107 transitions. [2021-03-10 21:23:33,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:33,642 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 1107 transitions. [2021-03-10 21:23:33,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:23:33,643 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:33,643 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:33,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:33,844 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:33,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:33,844 INFO L82 PathProgramCache]: Analyzing trace with hash -987391290, now seen corresponding path program 63 times [2021-03-10 21:23:33,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:33,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413228100] [2021-03-10 21:23:33,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:33,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:33,886 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:33,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413228100] [2021-03-10 21:23:33,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622139192] [2021-03-10 21:23:33,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:33,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:23:33,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:33,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:23:33,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:33,933 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:33,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:33,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:23:33,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142131121] [2021-03-10 21:23:33,933 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:23:33,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:33,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:23:33,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:33,934 INFO L87 Difference]: Start difference. First operand 404 states and 1107 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:34,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:34,004 INFO L93 Difference]: Finished difference Result 476 states and 1226 transitions. [2021-03-10 21:23:34,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:23:34,004 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:23:34,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:34,005 INFO L225 Difference]: With dead ends: 476 [2021-03-10 21:23:34,005 INFO L226 Difference]: Without dead ends: 476 [2021-03-10 21:23:34,005 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:34,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 476 states. [2021-03-10 21:23:34,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 476 to 405. [2021-03-10 21:23:34,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.7475247524752477) internal successors, (1110), 404 states have internal predecessors, (1110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:34,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1110 transitions. [2021-03-10 21:23:34,009 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1110 transitions. Word has length 17 [2021-03-10 21:23:34,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:34,009 INFO L480 AbstractCegarLoop]: Abstraction has 405 states and 1110 transitions. [2021-03-10 21:23:34,010 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:34,010 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1110 transitions. [2021-03-10 21:23:34,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:23:34,010 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:34,010 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:34,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-03-10 21:23:34,211 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:34,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:34,211 INFO L82 PathProgramCache]: Analyzing trace with hash 844347560, now seen corresponding path program 64 times [2021-03-10 21:23:34,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:34,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287090813] [2021-03-10 21:23:34,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:34,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:34,260 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:34,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287090813] [2021-03-10 21:23:34,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17057452] [2021-03-10 21:23:34,261 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:34,291 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:34,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:34,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:34,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:34,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:34,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 10 [2021-03-10 21:23:34,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818727597] [2021-03-10 21:23:34,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:34,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:34,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:34,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:34,316 INFO L87 Difference]: Start difference. First operand 405 states and 1110 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:34,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:34,405 INFO L93 Difference]: Finished difference Result 496 states and 1283 transitions. [2021-03-10 21:23:34,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:23:34,405 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:23:34,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:34,406 INFO L225 Difference]: With dead ends: 496 [2021-03-10 21:23:34,406 INFO L226 Difference]: Without dead ends: 490 [2021-03-10 21:23:34,406 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 83.3ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:23:34,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-03-10 21:23:34,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 405. [2021-03-10 21:23:34,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 404 states have (on average 2.735148514851485) internal successors, (1105), 404 states have internal predecessors, (1105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:34,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 1105 transitions. [2021-03-10 21:23:34,411 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 1105 transitions. Word has length 17 [2021-03-10 21:23:34,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:34,411 INFO L480 AbstractCegarLoop]: Abstraction has 405 states and 1105 transitions. [2021-03-10 21:23:34,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:34,411 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 1105 transitions. [2021-03-10 21:23:34,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:23:34,411 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:34,411 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:34,612 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-03-10 21:23:34,612 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:34,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:34,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1544905116, now seen corresponding path program 65 times [2021-03-10 21:23:34,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:34,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818554644] [2021-03-10 21:23:34,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:34,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:34,645 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:34,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818554644] [2021-03-10 21:23:34,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497875292] [2021-03-10 21:23:34,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:34,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:23:34,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:34,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:34,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:34,708 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:23:34,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:34,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 9 [2021-03-10 21:23:34,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884868346] [2021-03-10 21:23:34,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:23:34,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:34,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:23:34,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:34,709 INFO L87 Difference]: Start difference. First operand 405 states and 1105 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:34,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:34,750 INFO L93 Difference]: Finished difference Result 538 states and 1315 transitions. [2021-03-10 21:23:34,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:23:34,750 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:23:34,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:34,751 INFO L225 Difference]: With dead ends: 538 [2021-03-10 21:23:34,751 INFO L226 Difference]: Without dead ends: 538 [2021-03-10 21:23:34,751 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:34,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-03-10 21:23:34,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 410. [2021-03-10 21:23:34,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.743276283618582) internal successors, (1122), 409 states have internal predecessors, (1122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:34,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1122 transitions. [2021-03-10 21:23:34,758 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1122 transitions. Word has length 17 [2021-03-10 21:23:34,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:34,759 INFO L480 AbstractCegarLoop]: Abstraction has 410 states and 1122 transitions. [2021-03-10 21:23:34,759 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 9 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:34,759 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1122 transitions. [2021-03-10 21:23:34,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:23:34,759 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:34,759 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:34,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-03-10 21:23:34,960 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:34,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:34,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1911162882, now seen corresponding path program 66 times [2021-03-10 21:23:34,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:34,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527019405] [2021-03-10 21:23:34,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:34,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:34,997 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:34,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527019405] [2021-03-10 21:23:34,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659393114] [2021-03-10 21:23:34,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:35,014 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:23:35,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:35,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:23:35,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:35,053 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:35,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:35,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:23:35,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138656419] [2021-03-10 21:23:35,053 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:23:35,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:35,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:23:35,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:35,054 INFO L87 Difference]: Start difference. First operand 410 states and 1122 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:35,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:35,129 INFO L93 Difference]: Finished difference Result 512 states and 1266 transitions. [2021-03-10 21:23:35,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:23:35,129 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:23:35,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:35,130 INFO L225 Difference]: With dead ends: 512 [2021-03-10 21:23:35,130 INFO L226 Difference]: Without dead ends: 510 [2021-03-10 21:23:35,130 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:23:35,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-03-10 21:23:35,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 410. [2021-03-10 21:23:35,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.7310513447432765) internal successors, (1117), 409 states have internal predecessors, (1117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:35,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1117 transitions. [2021-03-10 21:23:35,135 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1117 transitions. Word has length 17 [2021-03-10 21:23:35,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:35,135 INFO L480 AbstractCegarLoop]: Abstraction has 410 states and 1117 transitions. [2021-03-10 21:23:35,135 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:35,135 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1117 transitions. [2021-03-10 21:23:35,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:23:35,136 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:35,136 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:35,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:35,336 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:35,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:35,337 INFO L82 PathProgramCache]: Analyzing trace with hash -894399418, now seen corresponding path program 67 times [2021-03-10 21:23:35,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:35,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1619138007] [2021-03-10 21:23:35,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:35,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:35,375 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:35,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1619138007] [2021-03-10 21:23:35,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256554767] [2021-03-10 21:23:35,376 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:35,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:35,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:35,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:35,430 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:23:35,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:35,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 10 [2021-03-10 21:23:35,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1084891535] [2021-03-10 21:23:35,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:35,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:35,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:35,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:35,431 INFO L87 Difference]: Start difference. First operand 410 states and 1117 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:35,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:35,518 INFO L93 Difference]: Finished difference Result 518 states and 1269 transitions. [2021-03-10 21:23:35,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:23:35,519 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:23:35,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:35,519 INFO L225 Difference]: With dead ends: 518 [2021-03-10 21:23:35,520 INFO L226 Difference]: Without dead ends: 514 [2021-03-10 21:23:35,520 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:23:35,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2021-03-10 21:23:35,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 410. [2021-03-10 21:23:35,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 2.7163814180929093) internal successors, (1111), 409 states have internal predecessors, (1111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:35,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 1111 transitions. [2021-03-10 21:23:35,524 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 1111 transitions. Word has length 17 [2021-03-10 21:23:35,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:35,524 INFO L480 AbstractCegarLoop]: Abstraction has 410 states and 1111 transitions. [2021-03-10 21:23:35,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:35,524 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 1111 transitions. [2021-03-10 21:23:35,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:23:35,525 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:35,525 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:35,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-03-10 21:23:35,725 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:35,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:35,726 INFO L82 PathProgramCache]: Analyzing trace with hash -1967484798, now seen corresponding path program 68 times [2021-03-10 21:23:35,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:35,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129325999] [2021-03-10 21:23:35,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:35,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:35,777 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:35,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129325999] [2021-03-10 21:23:35,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511266639] [2021-03-10 21:23:35,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:23:35,819 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:35,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:35,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:35,820 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:35,860 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:35,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:35,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-03-10 21:23:35,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508984011] [2021-03-10 21:23:35,861 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:35,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:35,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:35,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:35,861 INFO L87 Difference]: Start difference. First operand 410 states and 1111 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:35,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:35,967 INFO L93 Difference]: Finished difference Result 523 states and 1270 transitions. [2021-03-10 21:23:35,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:23:35,967 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:23:35,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:35,968 INFO L225 Difference]: With dead ends: 523 [2021-03-10 21:23:35,968 INFO L226 Difference]: Without dead ends: 517 [2021-03-10 21:23:35,968 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:23:35,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-03-10 21:23:35,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 411. [2021-03-10 21:23:35,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.7) internal successors, (1107), 410 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:35,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 1107 transitions. [2021-03-10 21:23:35,974 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 1107 transitions. Word has length 17 [2021-03-10 21:23:35,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:35,974 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 1107 transitions. [2021-03-10 21:23:35,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:35,974 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 1107 transitions. [2021-03-10 21:23:35,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:23:35,975 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:35,975 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:36,191 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-03-10 21:23:36,191 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:36,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:36,191 INFO L82 PathProgramCache]: Analyzing trace with hash -873393210, now seen corresponding path program 69 times [2021-03-10 21:23:36,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:36,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925501795] [2021-03-10 21:23:36,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:36,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:36,244 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:36,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925501795] [2021-03-10 21:23:36,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732994118] [2021-03-10 21:23:36,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:36,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:23:36,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:36,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:23:36,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:36,300 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:36,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:36,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:23:36,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587090509] [2021-03-10 21:23:36,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:36,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:36,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:36,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:36,301 INFO L87 Difference]: Start difference. First operand 411 states and 1107 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:36,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:36,414 INFO L93 Difference]: Finished difference Result 574 states and 1445 transitions. [2021-03-10 21:23:36,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:23:36,414 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:23:36,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:36,415 INFO L225 Difference]: With dead ends: 574 [2021-03-10 21:23:36,415 INFO L226 Difference]: Without dead ends: 566 [2021-03-10 21:23:36,415 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 105.9ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:23:36,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-03-10 21:23:36,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 420. [2021-03-10 21:23:36,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 419 states have (on average 2.6801909307875893) internal successors, (1123), 419 states have internal predecessors, (1123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:36,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 1123 transitions. [2021-03-10 21:23:36,424 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 1123 transitions. Word has length 17 [2021-03-10 21:23:36,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:36,424 INFO L480 AbstractCegarLoop]: Abstraction has 420 states and 1123 transitions. [2021-03-10 21:23:36,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:36,425 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 1123 transitions. [2021-03-10 21:23:36,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:23:36,425 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:36,425 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:36,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-03-10 21:23:36,646 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:36,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:36,646 INFO L82 PathProgramCache]: Analyzing trace with hash -416986994, now seen corresponding path program 70 times [2021-03-10 21:23:36,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:36,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911567787] [2021-03-10 21:23:36,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:36,695 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:36,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911567787] [2021-03-10 21:23:36,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858086508] [2021-03-10 21:23:36,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:36,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:36,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:36,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:23:36,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:36,757 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:36,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:36,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-03-10 21:23:36,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299353676] [2021-03-10 21:23:36,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:36,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:36,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:36,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:36,758 INFO L87 Difference]: Start difference. First operand 420 states and 1123 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:36,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:36,849 INFO L93 Difference]: Finished difference Result 565 states and 1384 transitions. [2021-03-10 21:23:36,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:23:36,850 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:23:36,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:36,851 INFO L225 Difference]: With dead ends: 565 [2021-03-10 21:23:36,851 INFO L226 Difference]: Without dead ends: 565 [2021-03-10 21:23:36,851 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 76.2ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:23:36,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 565 states. [2021-03-10 21:23:36,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 565 to 444. [2021-03-10 21:23:36,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.724604966139955) internal successors, (1207), 443 states have internal predecessors, (1207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:36,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1207 transitions. [2021-03-10 21:23:36,858 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1207 transitions. Word has length 17 [2021-03-10 21:23:36,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:36,858 INFO L480 AbstractCegarLoop]: Abstraction has 444 states and 1207 transitions. [2021-03-10 21:23:36,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:36,858 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1207 transitions. [2021-03-10 21:23:36,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:23:36,859 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:36,859 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:37,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:37,081 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:37,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:37,081 INFO L82 PathProgramCache]: Analyzing trace with hash -302988914, now seen corresponding path program 71 times [2021-03-10 21:23:37,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:37,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810557407] [2021-03-10 21:23:37,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:37,138 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:37,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810557407] [2021-03-10 21:23:37,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852354320] [2021-03-10 21:23:37,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:37,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:23:37,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:37,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:23:37,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:37,204 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:37,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:37,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-03-10 21:23:37,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491287999] [2021-03-10 21:23:37,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:37,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:37,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:37,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:37,205 INFO L87 Difference]: Start difference. First operand 444 states and 1207 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:37,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:37,323 INFO L93 Difference]: Finished difference Result 566 states and 1444 transitions. [2021-03-10 21:23:37,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:23:37,324 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:23:37,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:37,325 INFO L225 Difference]: With dead ends: 566 [2021-03-10 21:23:37,325 INFO L226 Difference]: Without dead ends: 558 [2021-03-10 21:23:37,325 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:23:37,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 558 states. [2021-03-10 21:23:37,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 558 to 444. [2021-03-10 21:23:37,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 444 states, 443 states have (on average 2.7200902934537248) internal successors, (1205), 443 states have internal predecessors, (1205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:37,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 1205 transitions. [2021-03-10 21:23:37,332 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 1205 transitions. Word has length 17 [2021-03-10 21:23:37,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:37,332 INFO L480 AbstractCegarLoop]: Abstraction has 444 states and 1205 transitions. [2021-03-10 21:23:37,332 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:37,332 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 1205 transitions. [2021-03-10 21:23:37,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:23:37,333 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:37,333 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:37,547 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:37,547 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:37,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:37,547 INFO L82 PathProgramCache]: Analyzing trace with hash 2053009298, now seen corresponding path program 72 times [2021-03-10 21:23:37,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:37,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31965534] [2021-03-10 21:23:37,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:37,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:37,603 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:37,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31965534] [2021-03-10 21:23:37,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292498728] [2021-03-10 21:23:37,603 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:23:37,626 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:23:37,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:37,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:37,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:37,668 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:37,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:37,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 12 [2021-03-10 21:23:37,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610372248] [2021-03-10 21:23:37,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:37,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:37,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:37,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:37,669 INFO L87 Difference]: Start difference. First operand 444 states and 1205 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:37,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:37,732 INFO L93 Difference]: Finished difference Result 642 states and 1598 transitions. [2021-03-10 21:23:37,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:23:37,732 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:23:37,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:37,733 INFO L225 Difference]: With dead ends: 642 [2021-03-10 21:23:37,733 INFO L226 Difference]: Without dead ends: 642 [2021-03-10 21:23:37,733 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:23:37,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2021-03-10 21:23:37,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 497. [2021-03-10 21:23:37,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.788306451612903) internal successors, (1383), 496 states have internal predecessors, (1383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:37,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1383 transitions. [2021-03-10 21:23:37,744 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1383 transitions. Word has length 17 [2021-03-10 21:23:37,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:37,744 INFO L480 AbstractCegarLoop]: Abstraction has 497 states and 1383 transitions. [2021-03-10 21:23:37,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:37,744 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1383 transitions. [2021-03-10 21:23:37,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:23:37,745 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:37,745 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:37,945 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:37,945 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:37,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:37,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1214110000, now seen corresponding path program 73 times [2021-03-10 21:23:37,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:37,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81603161] [2021-03-10 21:23:37,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:37,999 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:38,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81603161] [2021-03-10 21:23:38,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455297714] [2021-03-10 21:23:38,000 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:23:38,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:38,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:38,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:38,075 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:23:38,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:38,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 11 [2021-03-10 21:23:38,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402636613] [2021-03-10 21:23:38,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:38,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:38,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:38,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:38,076 INFO L87 Difference]: Start difference. First operand 497 states and 1383 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:38,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:38,172 INFO L93 Difference]: Finished difference Result 618 states and 1566 transitions. [2021-03-10 21:23:38,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:23:38,172 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:23:38,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:38,174 INFO L225 Difference]: With dead ends: 618 [2021-03-10 21:23:38,174 INFO L226 Difference]: Without dead ends: 616 [2021-03-10 21:23:38,174 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:23:38,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2021-03-10 21:23:38,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 497. [2021-03-10 21:23:38,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.784274193548387) internal successors, (1381), 496 states have internal predecessors, (1381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:38,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1381 transitions. [2021-03-10 21:23:38,181 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1381 transitions. Word has length 17 [2021-03-10 21:23:38,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:38,181 INFO L480 AbstractCegarLoop]: Abstraction has 497 states and 1381 transitions. [2021-03-10 21:23:38,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:38,182 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1381 transitions. [2021-03-10 21:23:38,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:23:38,182 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:38,182 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:38,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-03-10 21:23:38,405 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:38,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:38,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1591452300, now seen corresponding path program 74 times [2021-03-10 21:23:38,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:38,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906582838] [2021-03-10 21:23:38,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:38,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:38,459 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:38,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906582838] [2021-03-10 21:23:38,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881646931] [2021-03-10 21:23:38,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:23:38,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:38,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:38,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:38,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:38,538 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:38,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:38,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 12 [2021-03-10 21:23:38,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082201348] [2021-03-10 21:23:38,538 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:38,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:38,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:38,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:38,539 INFO L87 Difference]: Start difference. First operand 497 states and 1381 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:38,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:38,629 INFO L93 Difference]: Finished difference Result 624 states and 1572 transitions. [2021-03-10 21:23:38,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:23:38,629 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:23:38,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:38,630 INFO L225 Difference]: With dead ends: 624 [2021-03-10 21:23:38,630 INFO L226 Difference]: Without dead ends: 620 [2021-03-10 21:23:38,630 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:23:38,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-03-10 21:23:38,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 502. [2021-03-10 21:23:38,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 2.7864271457085827) internal successors, (1396), 501 states have internal predecessors, (1396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:38,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1396 transitions. [2021-03-10 21:23:38,636 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1396 transitions. Word has length 17 [2021-03-10 21:23:38,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:38,636 INFO L480 AbstractCegarLoop]: Abstraction has 502 states and 1396 transitions. [2021-03-10 21:23:38,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:38,636 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1396 transitions. [2021-03-10 21:23:38,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:23:38,636 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:38,636 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:38,837 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-03-10 21:23:38,837 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:38,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:38,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1630429616, now seen corresponding path program 75 times [2021-03-10 21:23:38,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:38,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692973266] [2021-03-10 21:23:38,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:38,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:38,891 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:38,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692973266] [2021-03-10 21:23:38,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672341173] [2021-03-10 21:23:38,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:38,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:23:38,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:38,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:23:38,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:38,960 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 13 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:38,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:38,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-03-10 21:23:38,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274989488] [2021-03-10 21:23:38,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:38,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:38,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:38,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:38,961 INFO L87 Difference]: Start difference. First operand 502 states and 1396 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:39,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:39,063 INFO L93 Difference]: Finished difference Result 723 states and 1870 transitions. [2021-03-10 21:23:39,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:23:39,063 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:23:39,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:39,064 INFO L225 Difference]: With dead ends: 723 [2021-03-10 21:23:39,064 INFO L226 Difference]: Without dead ends: 717 [2021-03-10 21:23:39,064 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:23:39,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2021-03-10 21:23:39,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 502. [2021-03-10 21:23:39,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 502 states, 501 states have (on average 2.7824351297405188) internal successors, (1394), 501 states have internal predecessors, (1394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:39,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 502 states to 502 states and 1394 transitions. [2021-03-10 21:23:39,070 INFO L78 Accepts]: Start accepts. Automaton has 502 states and 1394 transitions. Word has length 17 [2021-03-10 21:23:39,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:39,070 INFO L480 AbstractCegarLoop]: Abstraction has 502 states and 1394 transitions. [2021-03-10 21:23:39,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:39,070 INFO L276 IsEmpty]: Start isEmpty. Operand 502 states and 1394 transitions. [2021-03-10 21:23:39,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:23:39,071 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:39,071 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:39,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-03-10 21:23:39,271 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:39,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:39,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1570446092, now seen corresponding path program 76 times [2021-03-10 21:23:39,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:39,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36023857] [2021-03-10 21:23:39,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:39,326 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:39,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36023857] [2021-03-10 21:23:39,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211149698] [2021-03-10 21:23:39,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:39,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:39,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:39,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:39,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:39,388 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:39,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:39,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-03-10 21:23:39,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637956979] [2021-03-10 21:23:39,389 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:23:39,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:39,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:23:39,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:39,389 INFO L87 Difference]: Start difference. First operand 502 states and 1394 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:39,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:39,505 INFO L93 Difference]: Finished difference Result 736 states and 1882 transitions. [2021-03-10 21:23:39,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:23:39,506 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:23:39,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:39,507 INFO L225 Difference]: With dead ends: 736 [2021-03-10 21:23:39,507 INFO L226 Difference]: Without dead ends: 728 [2021-03-10 21:23:39,507 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 114.2ms TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:23:39,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-03-10 21:23:39,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 506. [2021-03-10 21:23:39,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.78019801980198) internal successors, (1404), 505 states have internal predecessors, (1404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:39,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1404 transitions. [2021-03-10 21:23:39,515 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1404 transitions. Word has length 17 [2021-03-10 21:23:39,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:39,515 INFO L480 AbstractCegarLoop]: Abstraction has 506 states and 1404 transitions. [2021-03-10 21:23:39,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:39,516 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1404 transitions. [2021-03-10 21:23:39,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-03-10 21:23:39,516 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:39,516 INFO L519 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:39,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-03-10 21:23:39,731 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:39,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:39,732 INFO L82 PathProgramCache]: Analyzing trace with hash -2013345232, now seen corresponding path program 77 times [2021-03-10 21:23:39,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:39,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138689678] [2021-03-10 21:23:39,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:39,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:39,795 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:39,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138689678] [2021-03-10 21:23:39,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942946169] [2021-03-10 21:23:39,795 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:39,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:23:39,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:39,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:23:39,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:39,892 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 20 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:39,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:39,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-03-10 21:23:39,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880902461] [2021-03-10 21:23:39,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:23:39,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:39,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:23:39,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:23:39,893 INFO L87 Difference]: Start difference. First operand 506 states and 1404 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:40,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:40,010 INFO L93 Difference]: Finished difference Result 575 states and 1546 transitions. [2021-03-10 21:23:40,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:23:40,010 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-03-10 21:23:40,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:40,011 INFO L225 Difference]: With dead ends: 575 [2021-03-10 21:23:40,011 INFO L226 Difference]: Without dead ends: 570 [2021-03-10 21:23:40,011 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 163.9ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:23:40,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-03-10 21:23:40,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 506. [2021-03-10 21:23:40,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 505 states have (on average 2.778217821782178) internal successors, (1403), 505 states have internal predecessors, (1403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:40,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 1403 transitions. [2021-03-10 21:23:40,018 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 1403 transitions. Word has length 17 [2021-03-10 21:23:40,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:40,018 INFO L480 AbstractCegarLoop]: Abstraction has 506 states and 1403 transitions. [2021-03-10 21:23:40,018 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:40,018 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 1403 transitions. [2021-03-10 21:23:40,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:40,019 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:40,019 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:40,220 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-03-10 21:23:40,220 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:40,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:40,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1740678897, now seen corresponding path program 78 times [2021-03-10 21:23:40,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:40,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737781987] [2021-03-10 21:23:40,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:40,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:40,259 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:40,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737781987] [2021-03-10 21:23:40,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654903746] [2021-03-10 21:23:40,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:40,308 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:23:40,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:40,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:23:40,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:40,469 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:40,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:23:40,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:23:40,610 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:40,610 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:23:40,610 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:23:40,615 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:40,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:40,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-03-10 21:23:40,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901961063] [2021-03-10 21:23:40,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:23:40,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:40,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:23:40,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:40,616 INFO L87 Difference]: Start difference. First operand 506 states and 1403 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:40,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:40,752 INFO L93 Difference]: Finished difference Result 610 states and 1596 transitions. [2021-03-10 21:23:40,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:23:40,752 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:23:40,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:40,754 INFO L225 Difference]: With dead ends: 610 [2021-03-10 21:23:40,754 INFO L226 Difference]: Without dead ends: 607 [2021-03-10 21:23:40,754 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 118.6ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:40,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-03-10 21:23:40,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 535. [2021-03-10 21:23:40,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 534 states have (on average 2.792134831460674) internal successors, (1491), 534 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:40,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 1491 transitions. [2021-03-10 21:23:40,761 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 1491 transitions. Word has length 18 [2021-03-10 21:23:40,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:40,761 INFO L480 AbstractCegarLoop]: Abstraction has 535 states and 1491 transitions. [2021-03-10 21:23:40,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:40,761 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 1491 transitions. [2021-03-10 21:23:40,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:40,762 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:40,762 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:40,983 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:40,983 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:40,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:40,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1612382321, now seen corresponding path program 79 times [2021-03-10 21:23:40,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:40,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460155452] [2021-03-10 21:23:40,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:40,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:41,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460155452] [2021-03-10 21:23:41,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106235875] [2021-03-10 21:23:41,029 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:41,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:41,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:23:41,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:41,269 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:41,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:23:41,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:23:41,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:41,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:23:41,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:23:41,429 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:41,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:41,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-03-10 21:23:41,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380995156] [2021-03-10 21:23:41,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:23:41,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:41,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:23:41,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:41,430 INFO L87 Difference]: Start difference. First operand 535 states and 1491 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:41,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:41,528 INFO L93 Difference]: Finished difference Result 674 states and 1772 transitions. [2021-03-10 21:23:41,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:23:41,528 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:23:41,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:41,529 INFO L225 Difference]: With dead ends: 674 [2021-03-10 21:23:41,529 INFO L226 Difference]: Without dead ends: 671 [2021-03-10 21:23:41,529 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 148.4ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:41,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671 states. [2021-03-10 21:23:41,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 671 to 575. [2021-03-10 21:23:41,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 575 states, 574 states have (on average 2.836236933797909) internal successors, (1628), 574 states have internal predecessors, (1628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:41,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 575 states to 575 states and 1628 transitions. [2021-03-10 21:23:41,535 INFO L78 Accepts]: Start accepts. Automaton has 575 states and 1628 transitions. Word has length 18 [2021-03-10 21:23:41,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:41,535 INFO L480 AbstractCegarLoop]: Abstraction has 575 states and 1628 transitions. [2021-03-10 21:23:41,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:41,535 INFO L276 IsEmpty]: Start isEmpty. Operand 575 states and 1628 transitions. [2021-03-10 21:23:41,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:41,536 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:41,536 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:41,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:41,737 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:41,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:41,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1250571143, now seen corresponding path program 80 times [2021-03-10 21:23:41,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:41,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557470543] [2021-03-10 21:23:41,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:41,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:41,783 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:23:41,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557470543] [2021-03-10 21:23:41,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1084059963] [2021-03-10 21:23:41,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:41,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:41,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:41,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:23:41,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:41,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:41,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:23:42,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:23:42,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:42,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:23:42,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:23:42,180 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:42,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:42,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-03-10 21:23:42,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402500842] [2021-03-10 21:23:42,180 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:23:42,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:42,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:23:42,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:42,181 INFO L87 Difference]: Start difference. First operand 575 states and 1628 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:42,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:42,283 INFO L93 Difference]: Finished difference Result 731 states and 1949 transitions. [2021-03-10 21:23:42,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:23:42,284 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:23:42,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:42,288 INFO L225 Difference]: With dead ends: 731 [2021-03-10 21:23:42,288 INFO L226 Difference]: Without dead ends: 728 [2021-03-10 21:23:42,288 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 122.1ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:42,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2021-03-10 21:23:42,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 616. [2021-03-10 21:23:42,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 615 states have (on average 2.8894308943089433) internal successors, (1777), 615 states have internal predecessors, (1777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:42,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 1777 transitions. [2021-03-10 21:23:42,298 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 1777 transitions. Word has length 18 [2021-03-10 21:23:42,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:42,298 INFO L480 AbstractCegarLoop]: Abstraction has 616 states and 1777 transitions. [2021-03-10 21:23:42,298 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:42,298 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 1777 transitions. [2021-03-10 21:23:42,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:42,299 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:42,299 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:42,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2021-03-10 21:23:42,520 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:42,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:42,520 INFO L82 PathProgramCache]: Analyzing trace with hash -192184689, now seen corresponding path program 81 times [2021-03-10 21:23:42,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:42,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492242929] [2021-03-10 21:23:42,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:42,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:42,563 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:42,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492242929] [2021-03-10 21:23:42,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345263785] [2021-03-10 21:23:42,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:42,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:23:42,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:42,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:23:42,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:42,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:42,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:23:42,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:23:42,955 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:42,956 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:23:42,956 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:23:42,963 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:42,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:42,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-03-10 21:23:42,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418269143] [2021-03-10 21:23:42,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:23:42,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:42,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:23:42,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:42,964 INFO L87 Difference]: Start difference. First operand 616 states and 1777 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:43,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:43,159 INFO L93 Difference]: Finished difference Result 778 states and 2109 transitions. [2021-03-10 21:23:43,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:23:43,159 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:23:43,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:43,161 INFO L225 Difference]: With dead ends: 778 [2021-03-10 21:23:43,161 INFO L226 Difference]: Without dead ends: 775 [2021-03-10 21:23:43,161 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 125.1ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:43,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2021-03-10 21:23:43,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 659. [2021-03-10 21:23:43,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 658 states have (on average 2.9376899696048633) internal successors, (1933), 658 states have internal predecessors, (1933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:43,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 1933 transitions. [2021-03-10 21:23:43,173 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 1933 transitions. Word has length 18 [2021-03-10 21:23:43,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:43,173 INFO L480 AbstractCegarLoop]: Abstraction has 659 states and 1933 transitions. [2021-03-10 21:23:43,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:43,174 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 1933 transitions. [2021-03-10 21:23:43,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:43,175 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:43,175 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:43,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2021-03-10 21:23:43,395 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:43,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:43,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1967942521, now seen corresponding path program 82 times [2021-03-10 21:23:43,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:43,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279786303] [2021-03-10 21:23:43,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:43,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:43,434 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:23:43,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279786303] [2021-03-10 21:23:43,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546536024] [2021-03-10 21:23:43,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:43,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:43,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:43,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:23:43,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:43,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:43,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:23:43,743 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:23:43,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:43,745 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:23:43,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:23:43,752 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:43,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:43,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-03-10 21:23:43,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119313906] [2021-03-10 21:23:43,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:23:43,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:43,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:23:43,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:43,753 INFO L87 Difference]: Start difference. First operand 659 states and 1933 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:43,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:43,881 INFO L93 Difference]: Finished difference Result 823 states and 2281 transitions. [2021-03-10 21:23:43,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:23:43,881 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:23:43,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:43,883 INFO L225 Difference]: With dead ends: 823 [2021-03-10 21:23:43,883 INFO L226 Difference]: Without dead ends: 820 [2021-03-10 21:23:43,883 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 132.7ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:43,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 820 states. [2021-03-10 21:23:43,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 820 to 714. [2021-03-10 21:23:43,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 714 states, 713 states have (on average 2.985974754558205) internal successors, (2129), 713 states have internal predecessors, (2129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:43,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 714 states to 714 states and 2129 transitions. [2021-03-10 21:23:43,895 INFO L78 Accepts]: Start accepts. Automaton has 714 states and 2129 transitions. Word has length 18 [2021-03-10 21:23:43,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:43,896 INFO L480 AbstractCegarLoop]: Abstraction has 714 states and 2129 transitions. [2021-03-10 21:23:43,896 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:43,896 INFO L276 IsEmpty]: Start isEmpty. Operand 714 states and 2129 transitions. [2021-03-10 21:23:43,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:43,897 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:43,897 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:44,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable407,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:44,111 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:44,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:44,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1181860465, now seen corresponding path program 83 times [2021-03-10 21:23:44,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:44,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680462652] [2021-03-10 21:23:44,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:44,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:44,155 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:44,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680462652] [2021-03-10 21:23:44,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468810793] [2021-03-10 21:23:44,157 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:44,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:23:44,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:44,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:23:44,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:44,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:44,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:23:44,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:23:44,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:44,481 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:23:44,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:23:44,488 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:44,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:44,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-03-10 21:23:44,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68202913] [2021-03-10 21:23:44,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:23:44,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:44,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:23:44,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:44,489 INFO L87 Difference]: Start difference. First operand 714 states and 2129 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:44,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:44,686 INFO L93 Difference]: Finished difference Result 908 states and 2540 transitions. [2021-03-10 21:23:44,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:23:44,687 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:23:44,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:44,688 INFO L225 Difference]: With dead ends: 908 [2021-03-10 21:23:44,689 INFO L226 Difference]: Without dead ends: 905 [2021-03-10 21:23:44,689 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 142.8ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:44,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 905 states. [2021-03-10 21:23:44,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 905 to 800. [2021-03-10 21:23:44,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 799 states have (on average 3.0) internal successors, (2397), 799 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:44,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 2397 transitions. [2021-03-10 21:23:44,705 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 2397 transitions. Word has length 18 [2021-03-10 21:23:44,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:44,705 INFO L480 AbstractCegarLoop]: Abstraction has 800 states and 2397 transitions. [2021-03-10 21:23:44,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:44,705 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 2397 transitions. [2021-03-10 21:23:44,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:23:44,707 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:44,707 INFO L519 BasicCegarLoop]: trace histogram [6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:44,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable449 [2021-03-10 21:23:44,927 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:44,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:44,927 INFO L82 PathProgramCache]: Analyzing trace with hash 1711846791, now seen corresponding path program 84 times [2021-03-10 21:23:44,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:44,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511015483] [2021-03-10 21:23:44,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:44,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:44,972 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:44,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [511015483] [2021-03-10 21:23:44,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736141350] [2021-03-10 21:23:44,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:45,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:23:45,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:45,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:23:45,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:45,188 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:45,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 11 new quantified variables, introduced 15 case distinctions, treesize of input 31 treesize of output 142 [2021-03-10 21:23:45,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:23:45,286 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:23:45,286 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:23:45,286 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:3 [2021-03-10 21:23:45,293 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:45,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:45,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-03-10 21:23:45,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546812681] [2021-03-10 21:23:45,294 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:23:45,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:45,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:23:45,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:45,294 INFO L87 Difference]: Start difference. First operand 800 states and 2397 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:45,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:45,427 INFO L93 Difference]: Finished difference Result 974 states and 2756 transitions. [2021-03-10 21:23:45,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:23:45,427 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:23:45,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:45,428 INFO L225 Difference]: With dead ends: 974 [2021-03-10 21:23:45,428 INFO L226 Difference]: Without dead ends: 971 [2021-03-10 21:23:45,429 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 151.7ms TimeCoverageRelationStatistics Valid=42, Invalid=264, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:45,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2021-03-10 21:23:45,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 872. [2021-03-10 21:23:45,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 3.0114810562571757) internal successors, (2623), 871 states have internal predecessors, (2623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:45,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 2623 transitions. [2021-03-10 21:23:45,438 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 2623 transitions. Word has length 18 [2021-03-10 21:23:45,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:45,438 INFO L480 AbstractCegarLoop]: Abstraction has 872 states and 2623 transitions. [2021-03-10 21:23:45,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:45,438 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 2623 transitions. [2021-03-10 21:23:45,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:45,440 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:45,440 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:45,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable498 [2021-03-10 21:23:45,643 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:45,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:45,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1937782575, now seen corresponding path program 85 times [2021-03-10 21:23:45,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:45,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477101496] [2021-03-10 21:23:45,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:45,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:45,710 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:45,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477101496] [2021-03-10 21:23:45,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511631613] [2021-03-10 21:23:45,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:45,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:45,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:23:45,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:45,769 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:45,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:45,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:23:45,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922708042] [2021-03-10 21:23:45,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:23:45,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:45,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:23:45,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:45,770 INFO L87 Difference]: Start difference. First operand 872 states and 2623 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:45,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:45,926 INFO L93 Difference]: Finished difference Result 993 states and 2794 transitions. [2021-03-10 21:23:45,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:23:45,927 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:23:45,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:45,928 INFO L225 Difference]: With dead ends: 993 [2021-03-10 21:23:45,928 INFO L226 Difference]: Without dead ends: 993 [2021-03-10 21:23:45,928 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:23:45,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 993 states. [2021-03-10 21:23:45,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 993 to 868. [2021-03-10 21:23:45,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 868 states, 867 states have (on average 3.0069204152249136) internal successors, (2607), 867 states have internal predecessors, (2607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:45,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 868 states to 868 states and 2607 transitions. [2021-03-10 21:23:45,941 INFO L78 Accepts]: Start accepts. Automaton has 868 states and 2607 transitions. Word has length 19 [2021-03-10 21:23:45,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:45,941 INFO L480 AbstractCegarLoop]: Abstraction has 868 states and 2607 transitions. [2021-03-10 21:23:45,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:45,941 INFO L276 IsEmpty]: Start isEmpty. Operand 868 states and 2607 transitions. [2021-03-10 21:23:45,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:45,942 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:45,943 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:46,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable541 [2021-03-10 21:23:46,143 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:46,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:46,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1896600742, now seen corresponding path program 86 times [2021-03-10 21:23:46,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:46,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200558554] [2021-03-10 21:23:46,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:46,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:46,214 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:46,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200558554] [2021-03-10 21:23:46,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484288785] [2021-03-10 21:23:46,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:46,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:46,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:46,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:23:46,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:46,274 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:46,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:46,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:23:46,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529316317] [2021-03-10 21:23:46,275 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:23:46,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:46,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:23:46,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:46,275 INFO L87 Difference]: Start difference. First operand 868 states and 2607 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:46,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:46,454 INFO L93 Difference]: Finished difference Result 1076 states and 2933 transitions. [2021-03-10 21:23:46,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:23:46,454 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:23:46,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:46,455 INFO L225 Difference]: With dead ends: 1076 [2021-03-10 21:23:46,455 INFO L226 Difference]: Without dead ends: 1067 [2021-03-10 21:23:46,455 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 159.9ms TimeCoverageRelationStatistics Valid=237, Invalid=465, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:23:46,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-03-10 21:23:46,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 886. [2021-03-10 21:23:46,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 2.994350282485876) internal successors, (2650), 885 states have internal predecessors, (2650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:46,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 2650 transitions. [2021-03-10 21:23:46,466 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 2650 transitions. Word has length 19 [2021-03-10 21:23:46,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:46,466 INFO L480 AbstractCegarLoop]: Abstraction has 886 states and 2650 transitions. [2021-03-10 21:23:46,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:46,466 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 2650 transitions. [2021-03-10 21:23:46,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:46,467 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:46,467 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:46,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable542 [2021-03-10 21:23:46,668 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:46,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:46,668 INFO L82 PathProgramCache]: Analyzing trace with hash -483433455, now seen corresponding path program 87 times [2021-03-10 21:23:46,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:46,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182903694] [2021-03-10 21:23:46,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:46,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:46,722 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:46,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182903694] [2021-03-10 21:23:46,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222694024] [2021-03-10 21:23:46,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:46,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:23:46,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:46,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:23:46,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:46,771 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:46,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:46,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:23:46,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375689745] [2021-03-10 21:23:46,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:46,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:46,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:46,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:46,772 INFO L87 Difference]: Start difference. First operand 886 states and 2650 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:46,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:46,871 INFO L93 Difference]: Finished difference Result 917 states and 2693 transitions. [2021-03-10 21:23:46,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:23:46,872 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:23:46,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:46,873 INFO L225 Difference]: With dead ends: 917 [2021-03-10 21:23:46,873 INFO L226 Difference]: Without dead ends: 916 [2021-03-10 21:23:46,873 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:46,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 916 states. [2021-03-10 21:23:46,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 916 to 886. [2021-03-10 21:23:46,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 886 states, 885 states have (on average 2.992090395480226) internal successors, (2648), 885 states have internal predecessors, (2648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:46,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 886 states to 886 states and 2648 transitions. [2021-03-10 21:23:46,884 INFO L78 Accepts]: Start accepts. Automaton has 886 states and 2648 transitions. Word has length 19 [2021-03-10 21:23:46,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:46,884 INFO L480 AbstractCegarLoop]: Abstraction has 886 states and 2648 transitions. [2021-03-10 21:23:46,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:46,884 INFO L276 IsEmpty]: Start isEmpty. Operand 886 states and 2648 transitions. [2021-03-10 21:23:46,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:46,886 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:46,886 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:47,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable543 [2021-03-10 21:23:47,106 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:47,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:47,107 INFO L82 PathProgramCache]: Analyzing trace with hash 433622898, now seen corresponding path program 88 times [2021-03-10 21:23:47,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:47,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104342933] [2021-03-10 21:23:47,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:47,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:47,155 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:47,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104342933] [2021-03-10 21:23:47,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016329788] [2021-03-10 21:23:47,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:23:47,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:47,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:47,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:23:47,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:47,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:47,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:23:47,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258900620] [2021-03-10 21:23:47,228 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:47,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:47,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:47,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:47,229 INFO L87 Difference]: Start difference. First operand 886 states and 2648 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:47,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:47,281 INFO L93 Difference]: Finished difference Result 1091 states and 2973 transitions. [2021-03-10 21:23:47,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:23:47,281 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:23:47,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:47,283 INFO L225 Difference]: With dead ends: 1091 [2021-03-10 21:23:47,283 INFO L226 Difference]: Without dead ends: 1091 [2021-03-10 21:23:47,283 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:47,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2021-03-10 21:23:47,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 869. [2021-03-10 21:23:47,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 868 states have (on average 2.975806451612903) internal successors, (2583), 868 states have internal predecessors, (2583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:47,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 2583 transitions. [2021-03-10 21:23:47,296 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 2583 transitions. Word has length 19 [2021-03-10 21:23:47,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:47,296 INFO L480 AbstractCegarLoop]: Abstraction has 869 states and 2583 transitions. [2021-03-10 21:23:47,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:47,296 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 2583 transitions. [2021-03-10 21:23:47,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:47,298 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:47,298 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:47,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:47,519 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:47,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:47,519 INFO L82 PathProgramCache]: Analyzing trace with hash 634065319, now seen corresponding path program 89 times [2021-03-10 21:23:47,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:47,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557103453] [2021-03-10 21:23:47,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:47,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:47,561 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:47,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557103453] [2021-03-10 21:23:47,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142831825] [2021-03-10 21:23:47,561 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:47,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:23:47,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:47,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:23:47,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:47,629 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:47,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:47,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:23:47,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719635211] [2021-03-10 21:23:47,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:47,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:47,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:47,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:47,630 INFO L87 Difference]: Start difference. First operand 869 states and 2583 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:47,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:47,709 INFO L93 Difference]: Finished difference Result 1088 states and 2969 transitions. [2021-03-10 21:23:47,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:23:47,709 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:23:47,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:47,710 INFO L225 Difference]: With dead ends: 1088 [2021-03-10 21:23:47,710 INFO L226 Difference]: Without dead ends: 1088 [2021-03-10 21:23:47,710 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:23:47,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-03-10 21:23:47,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 899. [2021-03-10 21:23:47,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 2.9844097995545655) internal successors, (2680), 898 states have internal predecessors, (2680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:47,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2680 transitions. [2021-03-10 21:23:47,724 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2680 transitions. Word has length 19 [2021-03-10 21:23:47,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:47,724 INFO L480 AbstractCegarLoop]: Abstraction has 899 states and 2680 transitions. [2021-03-10 21:23:47,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:47,724 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2680 transitions. [2021-03-10 21:23:47,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:47,726 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:47,726 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:47,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2021-03-10 21:23:47,939 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:47,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:47,939 INFO L82 PathProgramCache]: Analyzing trace with hash 1578827302, now seen corresponding path program 90 times [2021-03-10 21:23:47,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:47,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86080519] [2021-03-10 21:23:47,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:47,986 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:47,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86080519] [2021-03-10 21:23:47,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588670312] [2021-03-10 21:23:47,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:48,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:23:48,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:48,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:23:48,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:48,058 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:48,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:48,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:23:48,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180011450] [2021-03-10 21:23:48,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:48,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:48,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:48,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:48,059 INFO L87 Difference]: Start difference. First operand 899 states and 2680 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:48,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:48,180 INFO L93 Difference]: Finished difference Result 1083 states and 2957 transitions. [2021-03-10 21:23:48,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:23:48,180 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:23:48,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:48,181 INFO L225 Difference]: With dead ends: 1083 [2021-03-10 21:23:48,181 INFO L226 Difference]: Without dead ends: 1081 [2021-03-10 21:23:48,182 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 84.3ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:48,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-03-10 21:23:48,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 907. [2021-03-10 21:23:48,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 2.987858719646799) internal successors, (2707), 906 states have internal predecessors, (2707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:48,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 2707 transitions. [2021-03-10 21:23:48,196 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 2707 transitions. Word has length 19 [2021-03-10 21:23:48,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:48,196 INFO L480 AbstractCegarLoop]: Abstraction has 907 states and 2707 transitions. [2021-03-10 21:23:48,196 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:48,197 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 2707 transitions. [2021-03-10 21:23:48,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:48,198 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:48,198 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:48,420 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable546 [2021-03-10 21:23:48,420 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:48,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:48,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1915447287, now seen corresponding path program 91 times [2021-03-10 21:23:48,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:48,421 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300833894] [2021-03-10 21:23:48,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:48,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:48,464 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:48,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300833894] [2021-03-10 21:23:48,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368309473] [2021-03-10 21:23:48,465 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:48,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:48,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:23:48,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:48,521 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 17 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:48,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:48,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:23:48,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938628156] [2021-03-10 21:23:48,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:48,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:48,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:48,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:48,522 INFO L87 Difference]: Start difference. First operand 907 states and 2707 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:48,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:48,655 INFO L93 Difference]: Finished difference Result 1039 states and 2898 transitions. [2021-03-10 21:23:48,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:23:48,656 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:23:48,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:48,657 INFO L225 Difference]: With dead ends: 1039 [2021-03-10 21:23:48,657 INFO L226 Difference]: Without dead ends: 1037 [2021-03-10 21:23:48,657 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 79.6ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:48,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1037 states. [2021-03-10 21:23:48,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1037 to 884. [2021-03-10 21:23:48,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 2.9750849377123445) internal successors, (2627), 883 states have internal predecessors, (2627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:48,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2627 transitions. [2021-03-10 21:23:48,666 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2627 transitions. Word has length 19 [2021-03-10 21:23:48,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:48,667 INFO L480 AbstractCegarLoop]: Abstraction has 884 states and 2627 transitions. [2021-03-10 21:23:48,667 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:48,667 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2627 transitions. [2021-03-10 21:23:48,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:48,668 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:48,668 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:48,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable547 [2021-03-10 21:23:48,868 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:48,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:48,869 INFO L82 PathProgramCache]: Analyzing trace with hash -998390934, now seen corresponding path program 92 times [2021-03-10 21:23:48,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:48,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186619116] [2021-03-10 21:23:48,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:48,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186619116] [2021-03-10 21:23:48,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196026703] [2021-03-10 21:23:48,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:48,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:48,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:48,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:23:48,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:48,986 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:48,986 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:48,986 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:23:48,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895695508] [2021-03-10 21:23:48,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:48,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:48,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:48,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:48,987 INFO L87 Difference]: Start difference. First operand 884 states and 2627 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:49,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:49,048 INFO L93 Difference]: Finished difference Result 1108 states and 2970 transitions. [2021-03-10 21:23:49,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:23:49,048 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:23:49,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:49,049 INFO L225 Difference]: With dead ends: 1108 [2021-03-10 21:23:49,049 INFO L226 Difference]: Without dead ends: 1108 [2021-03-10 21:23:49,049 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 48.4ms TimeCoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:49,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2021-03-10 21:23:49,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 887. [2021-03-10 21:23:49,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 887 states, 886 states have (on average 2.9729119638826185) internal successors, (2634), 886 states have internal predecessors, (2634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:49,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 887 states to 887 states and 2634 transitions. [2021-03-10 21:23:49,060 INFO L78 Accepts]: Start accepts. Automaton has 887 states and 2634 transitions. Word has length 19 [2021-03-10 21:23:49,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:49,060 INFO L480 AbstractCegarLoop]: Abstraction has 887 states and 2634 transitions. [2021-03-10 21:23:49,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:49,060 INFO L276 IsEmpty]: Start isEmpty. Operand 887 states and 2634 transitions. [2021-03-10 21:23:49,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:49,061 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:49,061 INFO L519 BasicCegarLoop]: trace histogram [7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:49,262 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable548 [2021-03-10 21:23:49,262 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:49,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:49,262 INFO L82 PathProgramCache]: Analyzing trace with hash -204833979, now seen corresponding path program 93 times [2021-03-10 21:23:49,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:49,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250308876] [2021-03-10 21:23:49,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:49,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:49,313 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 14 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:49,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250308876] [2021-03-10 21:23:49,313 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616100308] [2021-03-10 21:23:49,313 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:49,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:23:49,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:49,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-03-10 21:23:49,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:49,422 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:23:49,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:49,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 18 [2021-03-10 21:23:49,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368415990] [2021-03-10 21:23:49,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:23:49,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:49,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:23:49,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:23:49,423 INFO L87 Difference]: Start difference. First operand 887 states and 2634 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:49,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:49,998 INFO L93 Difference]: Finished difference Result 2007 states and 5647 transitions. [2021-03-10 21:23:49,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-03-10 21:23:49,999 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:23:49,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:50,001 INFO L225 Difference]: With dead ends: 2007 [2021-03-10 21:23:50,001 INFO L226 Difference]: Without dead ends: 1998 [2021-03-10 21:23:50,001 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 440.1ms TimeCoverageRelationStatistics Valid=356, Invalid=2836, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 21:23:50,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1998 states. [2021-03-10 21:23:50,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1998 to 1397. [2021-03-10 21:23:50,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1397 states, 1396 states have (on average 2.930515759312321) internal successors, (4091), 1396 states have internal predecessors, (4091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:50,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1397 states to 1397 states and 4091 transitions. [2021-03-10 21:23:50,016 INFO L78 Accepts]: Start accepts. Automaton has 1397 states and 4091 transitions. Word has length 19 [2021-03-10 21:23:50,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:50,017 INFO L480 AbstractCegarLoop]: Abstraction has 1397 states and 4091 transitions. [2021-03-10 21:23:50,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:50,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1397 states and 4091 transitions. [2021-03-10 21:23:50,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:50,018 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:50,018 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:50,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable549,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:50,219 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:50,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:50,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1567529028, now seen corresponding path program 94 times [2021-03-10 21:23:50,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:50,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715383705] [2021-03-10 21:23:50,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:50,262 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:50,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715383705] [2021-03-10 21:23:50,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091055069] [2021-03-10 21:23:50,263 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:50,281 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:50,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:50,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:23:50,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:50,319 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:50,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:50,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:23:50,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068239045] [2021-03-10 21:23:50,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:50,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:50,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:50,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:50,320 INFO L87 Difference]: Start difference. First operand 1397 states and 4091 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:50,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:50,384 INFO L93 Difference]: Finished difference Result 1816 states and 4866 transitions. [2021-03-10 21:23:50,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:23:50,385 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:23:50,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:50,386 INFO L225 Difference]: With dead ends: 1816 [2021-03-10 21:23:50,386 INFO L226 Difference]: Without dead ends: 1816 [2021-03-10 21:23:50,387 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:23:50,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1816 states. [2021-03-10 21:23:50,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1816 to 1363. [2021-03-10 21:23:50,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 2.9140969162995596) internal successors, (3969), 1362 states have internal predecessors, (3969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:50,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 3969 transitions. [2021-03-10 21:23:50,403 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 3969 transitions. Word has length 19 [2021-03-10 21:23:50,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:50,403 INFO L480 AbstractCegarLoop]: Abstraction has 1363 states and 3969 transitions. [2021-03-10 21:23:50,403 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:50,403 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 3969 transitions. [2021-03-10 21:23:50,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:50,404 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:50,404 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:50,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:50,605 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:50,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:50,605 INFO L82 PathProgramCache]: Analyzing trace with hash 136071470, now seen corresponding path program 95 times [2021-03-10 21:23:50,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:50,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492203529] [2021-03-10 21:23:50,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:50,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:50,649 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:50,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492203529] [2021-03-10 21:23:50,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1129530857] [2021-03-10 21:23:50,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:50,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:23:50,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:50,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:23:50,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:50,698 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:50,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:50,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:23:50,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125241687] [2021-03-10 21:23:50,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:50,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:50,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:50,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:50,699 INFO L87 Difference]: Start difference. First operand 1363 states and 3969 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:50,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:50,803 INFO L93 Difference]: Finished difference Result 1590 states and 4309 transitions. [2021-03-10 21:23:50,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:23:50,803 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:23:50,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:50,804 INFO L225 Difference]: With dead ends: 1590 [2021-03-10 21:23:50,804 INFO L226 Difference]: Without dead ends: 1588 [2021-03-10 21:23:50,805 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 78.3ms TimeCoverageRelationStatistics Valid=115, Invalid=191, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:50,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1588 states. [2021-03-10 21:23:50,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1588 to 1376. [2021-03-10 21:23:50,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1376 states, 1375 states have (on average 2.9134545454545453) internal successors, (4006), 1375 states have internal predecessors, (4006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:50,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 4006 transitions. [2021-03-10 21:23:50,819 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 4006 transitions. Word has length 19 [2021-03-10 21:23:50,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:50,819 INFO L480 AbstractCegarLoop]: Abstraction has 1376 states and 4006 transitions. [2021-03-10 21:23:50,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:50,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 4006 transitions. [2021-03-10 21:23:50,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:50,821 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:50,821 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:51,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable551 [2021-03-10 21:23:51,023 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:51,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:51,023 INFO L82 PathProgramCache]: Analyzing trace with hash 1853820530, now seen corresponding path program 96 times [2021-03-10 21:23:51,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:51,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473148002] [2021-03-10 21:23:51,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:51,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:51,067 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:51,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473148002] [2021-03-10 21:23:51,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790006535] [2021-03-10 21:23:51,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:51,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:23:51,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:51,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:23:51,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:51,121 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 17 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:51,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:51,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:23:51,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949657597] [2021-03-10 21:23:51,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:51,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:51,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:51,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:51,122 INFO L87 Difference]: Start difference. First operand 1376 states and 4006 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:51,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:51,167 INFO L93 Difference]: Finished difference Result 1582 states and 4263 transitions. [2021-03-10 21:23:51,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:23:51,167 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:23:51,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:51,169 INFO L225 Difference]: With dead ends: 1582 [2021-03-10 21:23:51,169 INFO L226 Difference]: Without dead ends: 1582 [2021-03-10 21:23:51,169 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 37.1ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:51,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-03-10 21:23:51,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1360. [2021-03-10 21:23:51,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1360 states, 1359 states have (on average 2.9021339220014717) internal successors, (3944), 1359 states have internal predecessors, (3944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:51,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1360 states to 1360 states and 3944 transitions. [2021-03-10 21:23:51,184 INFO L78 Accepts]: Start accepts. Automaton has 1360 states and 3944 transitions. Word has length 19 [2021-03-10 21:23:51,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:51,184 INFO L480 AbstractCegarLoop]: Abstraction has 1360 states and 3944 transitions. [2021-03-10 21:23:51,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:51,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1360 states and 3944 transitions. [2021-03-10 21:23:51,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:51,185 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:51,185 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:51,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-03-10 21:23:51,386 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:51,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:51,386 INFO L82 PathProgramCache]: Analyzing trace with hash 124773196, now seen corresponding path program 97 times [2021-03-10 21:23:51,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:51,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722137425] [2021-03-10 21:23:51,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:51,429 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:51,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722137425] [2021-03-10 21:23:51,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1133109184] [2021-03-10 21:23:51,429 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:51,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:51,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:23:51,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:51,492 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:51,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:51,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:23:51,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955644788] [2021-03-10 21:23:51,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:51,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:51,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:51,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:51,493 INFO L87 Difference]: Start difference. First operand 1360 states and 3944 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:51,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:51,561 INFO L93 Difference]: Finished difference Result 1713 states and 4555 transitions. [2021-03-10 21:23:51,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:23:51,562 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:23:51,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:51,563 INFO L225 Difference]: With dead ends: 1713 [2021-03-10 21:23:51,563 INFO L226 Difference]: Without dead ends: 1713 [2021-03-10 21:23:51,564 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:23:51,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1713 states. [2021-03-10 21:23:51,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1713 to 1363. [2021-03-10 21:23:51,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 2.9023494860499266) internal successors, (3953), 1362 states have internal predecessors, (3953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:51,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 3953 transitions. [2021-03-10 21:23:51,579 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 3953 transitions. Word has length 19 [2021-03-10 21:23:51,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:51,579 INFO L480 AbstractCegarLoop]: Abstraction has 1363 states and 3953 transitions. [2021-03-10 21:23:51,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:51,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 3953 transitions. [2021-03-10 21:23:51,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:51,580 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:51,580 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:51,780 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable553,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:51,780 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:51,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:51,781 INFO L82 PathProgramCache]: Analyzing trace with hash -1936086606, now seen corresponding path program 98 times [2021-03-10 21:23:51,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:51,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909419856] [2021-03-10 21:23:51,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:51,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:51,831 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:51,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909419856] [2021-03-10 21:23:51,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915236140] [2021-03-10 21:23:51,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:51,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:51,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:51,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:23:51,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:51,887 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:51,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:51,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:23:51,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377599505] [2021-03-10 21:23:51,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:51,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:51,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:51,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:51,888 INFO L87 Difference]: Start difference. First operand 1363 states and 3953 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:51,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:51,976 INFO L93 Difference]: Finished difference Result 2155 states and 5922 transitions. [2021-03-10 21:23:51,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:23:51,976 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:23:51,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:51,978 INFO L225 Difference]: With dead ends: 2155 [2021-03-10 21:23:51,978 INFO L226 Difference]: Without dead ends: 2155 [2021-03-10 21:23:51,978 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 77.0ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:51,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2155 states. [2021-03-10 21:23:51,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2155 to 1651. [2021-03-10 21:23:51,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1651 states, 1650 states have (on average 2.983030303030303) internal successors, (4922), 1650 states have internal predecessors, (4922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:51,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1651 states to 1651 states and 4922 transitions. [2021-03-10 21:23:51,998 INFO L78 Accepts]: Start accepts. Automaton has 1651 states and 4922 transitions. Word has length 19 [2021-03-10 21:23:51,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:51,999 INFO L480 AbstractCegarLoop]: Abstraction has 1651 states and 4922 transitions. [2021-03-10 21:23:51,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:51,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1651 states and 4922 transitions. [2021-03-10 21:23:52,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:52,000 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:52,000 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:52,201 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-03-10 21:23:52,201 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:52,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:52,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1320949180, now seen corresponding path program 99 times [2021-03-10 21:23:52,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:52,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99282121] [2021-03-10 21:23:52,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:52,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:52,249 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:23:52,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99282121] [2021-03-10 21:23:52,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571410348] [2021-03-10 21:23:52,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:52,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:23:52,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:52,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:23:52,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:52,310 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:23:52,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:52,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-03-10 21:23:52,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123025993] [2021-03-10 21:23:52,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:23:52,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:52,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:23:52,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:23:52,311 INFO L87 Difference]: Start difference. First operand 1651 states and 4922 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:52,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:52,425 INFO L93 Difference]: Finished difference Result 1877 states and 5329 transitions. [2021-03-10 21:23:52,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:23:52,425 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:23:52,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:52,428 INFO L225 Difference]: With dead ends: 1877 [2021-03-10 21:23:52,428 INFO L226 Difference]: Without dead ends: 1873 [2021-03-10 21:23:52,428 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:23:52,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2021-03-10 21:23:52,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1703. [2021-03-10 21:23:52,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1703 states, 1702 states have (on average 2.9958871915393654) internal successors, (5099), 1702 states have internal predecessors, (5099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:52,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1703 states to 1703 states and 5099 transitions. [2021-03-10 21:23:52,454 INFO L78 Accepts]: Start accepts. Automaton has 1703 states and 5099 transitions. Word has length 19 [2021-03-10 21:23:52,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:52,454 INFO L480 AbstractCegarLoop]: Abstraction has 1703 states and 5099 transitions. [2021-03-10 21:23:52,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:52,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1703 states and 5099 transitions. [2021-03-10 21:23:52,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:52,456 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:52,456 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:52,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable555,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:52,678 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:52,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:52,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1089469124, now seen corresponding path program 100 times [2021-03-10 21:23:52,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:52,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531182289] [2021-03-10 21:23:52,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:52,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:52,724 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:52,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531182289] [2021-03-10 21:23:52,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895291539] [2021-03-10 21:23:52,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:52,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:52,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:52,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:23:52,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:52,778 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:52,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:52,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:23:52,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172236045] [2021-03-10 21:23:52,779 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:52,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:52,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:52,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:52,779 INFO L87 Difference]: Start difference. First operand 1703 states and 5099 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:52,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:52,864 INFO L93 Difference]: Finished difference Result 2270 states and 6309 transitions. [2021-03-10 21:23:52,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:23:52,864 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:23:52,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:52,867 INFO L225 Difference]: With dead ends: 2270 [2021-03-10 21:23:52,867 INFO L226 Difference]: Without dead ends: 2270 [2021-03-10 21:23:52,867 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:52,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2270 states. [2021-03-10 21:23:52,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2270 to 1409. [2021-03-10 21:23:52,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1408 states have (on average 2.9396306818181817) internal successors, (4139), 1408 states have internal predecessors, (4139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:52,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 4139 transitions. [2021-03-10 21:23:52,884 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 4139 transitions. Word has length 19 [2021-03-10 21:23:52,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:52,884 INFO L480 AbstractCegarLoop]: Abstraction has 1409 states and 4139 transitions. [2021-03-10 21:23:52,884 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:52,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 4139 transitions. [2021-03-10 21:23:52,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:52,885 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:52,885 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:53,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable556 [2021-03-10 21:23:53,099 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:53,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:53,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1639686362, now seen corresponding path program 101 times [2021-03-10 21:23:53,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:53,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322802175] [2021-03-10 21:23:53,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:53,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:53,148 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:53,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322802175] [2021-03-10 21:23:53,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448894938] [2021-03-10 21:23:53,149 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:53,167 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:23:53,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:53,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:23:53,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:53,196 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:53,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:53,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:23:53,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208360753] [2021-03-10 21:23:53,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:53,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:53,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:53,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:53,196 INFO L87 Difference]: Start difference. First operand 1409 states and 4139 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:53,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:53,293 INFO L93 Difference]: Finished difference Result 1616 states and 4431 transitions. [2021-03-10 21:23:53,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:23:53,294 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:23:53,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:53,295 INFO L225 Difference]: With dead ends: 1616 [2021-03-10 21:23:53,295 INFO L226 Difference]: Without dead ends: 1612 [2021-03-10 21:23:53,295 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:53,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-03-10 21:23:53,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1392. [2021-03-10 21:23:53,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1392 states, 1391 states have (on average 2.9281092739036665) internal successors, (4073), 1391 states have internal predecessors, (4073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:53,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1392 states to 1392 states and 4073 transitions. [2021-03-10 21:23:53,310 INFO L78 Accepts]: Start accepts. Automaton has 1392 states and 4073 transitions. Word has length 19 [2021-03-10 21:23:53,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:53,310 INFO L480 AbstractCegarLoop]: Abstraction has 1392 states and 4073 transitions. [2021-03-10 21:23:53,310 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:53,310 INFO L276 IsEmpty]: Start isEmpty. Operand 1392 states and 4073 transitions. [2021-03-10 21:23:53,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:53,311 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:53,311 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:53,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable557,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:53,512 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:53,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:53,512 INFO L82 PathProgramCache]: Analyzing trace with hash 78062698, now seen corresponding path program 102 times [2021-03-10 21:23:53,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:53,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217383850] [2021-03-10 21:23:53,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:53,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:53,556 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:53,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217383850] [2021-03-10 21:23:53,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030098069] [2021-03-10 21:23:53,557 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:53,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:23:53,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:53,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:23:53,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:53,637 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 18 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:53,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:53,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:23:53,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458036435] [2021-03-10 21:23:53,638 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:53,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:53,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:53,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:53,638 INFO L87 Difference]: Start difference. First operand 1392 states and 4073 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:53,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:53,698 INFO L93 Difference]: Finished difference Result 1671 states and 4517 transitions. [2021-03-10 21:23:53,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:23:53,698 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:23:53,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:53,700 INFO L225 Difference]: With dead ends: 1671 [2021-03-10 21:23:53,700 INFO L226 Difference]: Without dead ends: 1671 [2021-03-10 21:23:53,700 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:53,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1671 states. [2021-03-10 21:23:53,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1671 to 1393. [2021-03-10 21:23:53,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1392 states have (on average 2.923132183908046) internal successors, (4069), 1392 states have internal predecessors, (4069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:53,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 4069 transitions. [2021-03-10 21:23:53,719 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 4069 transitions. Word has length 19 [2021-03-10 21:23:53,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:53,719 INFO L480 AbstractCegarLoop]: Abstraction has 1393 states and 4069 transitions. [2021-03-10 21:23:53,719 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:53,719 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 4069 transitions. [2021-03-10 21:23:53,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:53,721 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:53,721 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:53,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-03-10 21:23:53,939 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:53,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:53,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1650984636, now seen corresponding path program 103 times [2021-03-10 21:23:53,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:53,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813937979] [2021-03-10 21:23:53,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:53,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:53,989 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:53,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813937979] [2021-03-10 21:23:53,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510087202] [2021-03-10 21:23:53,990 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:54,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:54,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:23:54,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:54,057 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:54,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:54,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:23:54,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688001008] [2021-03-10 21:23:54,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:54,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:54,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:54,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:54,058 INFO L87 Difference]: Start difference. First operand 1393 states and 4069 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:54,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:54,115 INFO L93 Difference]: Finished difference Result 1578 states and 4284 transitions. [2021-03-10 21:23:54,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:23:54,116 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:23:54,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:54,117 INFO L225 Difference]: With dead ends: 1578 [2021-03-10 21:23:54,117 INFO L226 Difference]: Without dead ends: 1578 [2021-03-10 21:23:54,117 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 59.3ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:54,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-03-10 21:23:54,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1355. [2021-03-10 21:23:54,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1355 states, 1354 states have (on average 2.9084194977843425) internal successors, (3938), 1354 states have internal predecessors, (3938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:54,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1355 states to 1355 states and 3938 transitions. [2021-03-10 21:23:54,130 INFO L78 Accepts]: Start accepts. Automaton has 1355 states and 3938 transitions. Word has length 19 [2021-03-10 21:23:54,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:54,130 INFO L480 AbstractCegarLoop]: Abstraction has 1355 states and 3938 transitions. [2021-03-10 21:23:54,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:54,130 INFO L276 IsEmpty]: Start isEmpty. Operand 1355 states and 3938 transitions. [2021-03-10 21:23:54,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:54,131 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:54,131 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:54,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable559 [2021-03-10 21:23:54,332 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:54,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:54,332 INFO L82 PathProgramCache]: Analyzing trace with hash 583122858, now seen corresponding path program 104 times [2021-03-10 21:23:54,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:54,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583743710] [2021-03-10 21:23:54,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:54,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:54,383 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:54,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583743710] [2021-03-10 21:23:54,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760492187] [2021-03-10 21:23:54,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:23:54,409 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:54,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:54,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:23:54,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:54,455 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:54,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:54,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:23:54,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861448743] [2021-03-10 21:23:54,455 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:54,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:54,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:54,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:54,456 INFO L87 Difference]: Start difference. First operand 1355 states and 3938 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:54,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:54,560 INFO L93 Difference]: Finished difference Result 1698 states and 4556 transitions. [2021-03-10 21:23:54,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:23:54,561 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:23:54,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:54,563 INFO L225 Difference]: With dead ends: 1698 [2021-03-10 21:23:54,563 INFO L226 Difference]: Without dead ends: 1698 [2021-03-10 21:23:54,563 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 85.1ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:54,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1698 states. [2021-03-10 21:23:54,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1698 to 1299. [2021-03-10 21:23:54,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1299 states, 1298 states have (on average 2.8821263482280433) internal successors, (3741), 1298 states have internal predecessors, (3741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:54,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1299 states to 1299 states and 3741 transitions. [2021-03-10 21:23:54,577 INFO L78 Accepts]: Start accepts. Automaton has 1299 states and 3741 transitions. Word has length 19 [2021-03-10 21:23:54,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:54,578 INFO L480 AbstractCegarLoop]: Abstraction has 1299 states and 3741 transitions. [2021-03-10 21:23:54,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:54,578 INFO L276 IsEmpty]: Start isEmpty. Operand 1299 states and 3741 transitions. [2021-03-10 21:23:54,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:54,579 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:54,579 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:54,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:54,779 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:54,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:54,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1120978436, now seen corresponding path program 105 times [2021-03-10 21:23:54,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:54,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024550387] [2021-03-10 21:23:54,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:54,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:54,829 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:54,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024550387] [2021-03-10 21:23:54,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95186617] [2021-03-10 21:23:54,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:54,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:23:54,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:54,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:23:54,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:54,895 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:54,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:54,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:23:54,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034920345] [2021-03-10 21:23:54,895 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:54,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:54,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:54,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:54,896 INFO L87 Difference]: Start difference. First operand 1299 states and 3741 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:55,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:55,031 INFO L93 Difference]: Finished difference Result 2138 states and 5768 transitions. [2021-03-10 21:23:55,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:23:55,031 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:23:55,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:55,033 INFO L225 Difference]: With dead ends: 2138 [2021-03-10 21:23:55,033 INFO L226 Difference]: Without dead ends: 2138 [2021-03-10 21:23:55,033 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 102.1ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:23:55,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2138 states. [2021-03-10 21:23:55,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2138 to 1510. [2021-03-10 21:23:55,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1510 states, 1509 states have (on average 2.952286282306163) internal successors, (4455), 1509 states have internal predecessors, (4455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:55,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1510 states to 1510 states and 4455 transitions. [2021-03-10 21:23:55,055 INFO L78 Accepts]: Start accepts. Automaton has 1510 states and 4455 transitions. Word has length 19 [2021-03-10 21:23:55,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:55,055 INFO L480 AbstractCegarLoop]: Abstraction has 1510 states and 4455 transitions. [2021-03-10 21:23:55,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:55,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1510 states and 4455 transitions. [2021-03-10 21:23:55,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:55,057 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:55,057 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:55,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:55,257 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:55,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:55,257 INFO L82 PathProgramCache]: Analyzing trace with hash 423925554, now seen corresponding path program 106 times [2021-03-10 21:23:55,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:55,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230612378] [2021-03-10 21:23:55,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:55,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:55,314 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:55,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230612378] [2021-03-10 21:23:55,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180447474] [2021-03-10 21:23:55,314 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:55,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:55,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:55,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:23:55,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:55,365 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:55,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:55,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:23:55,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328215542] [2021-03-10 21:23:55,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:55,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:55,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:55,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:55,365 INFO L87 Difference]: Start difference. First operand 1510 states and 4455 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:55,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:55,487 INFO L93 Difference]: Finished difference Result 1994 states and 5446 transitions. [2021-03-10 21:23:55,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:23:55,487 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:23:55,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:55,489 INFO L225 Difference]: With dead ends: 1994 [2021-03-10 21:23:55,489 INFO L226 Difference]: Without dead ends: 1994 [2021-03-10 21:23:55,489 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:23:55,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1994 states. [2021-03-10 21:23:55,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1994 to 1216. [2021-03-10 21:23:55,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1216 states, 1215 states have (on average 2.891358024691358) internal successors, (3513), 1215 states have internal predecessors, (3513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:55,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1216 states to 1216 states and 3513 transitions. [2021-03-10 21:23:55,503 INFO L78 Accepts]: Start accepts. Automaton has 1216 states and 3513 transitions. Word has length 19 [2021-03-10 21:23:55,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:55,503 INFO L480 AbstractCegarLoop]: Abstraction has 1216 states and 3513 transitions. [2021-03-10 21:23:55,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:55,504 INFO L276 IsEmpty]: Start isEmpty. Operand 1216 states and 3513 transitions. [2021-03-10 21:23:55,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:55,505 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:55,505 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:55,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-03-10 21:23:55,705 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:55,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:55,705 INFO L82 PathProgramCache]: Analyzing trace with hash -853604306, now seen corresponding path program 107 times [2021-03-10 21:23:55,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:55,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448480182] [2021-03-10 21:23:55,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:55,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:55,751 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:55,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448480182] [2021-03-10 21:23:55,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630857981] [2021-03-10 21:23:55,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:23:55,804 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:23:55,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:55,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:23:55,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:55,839 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:55,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:55,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:23:55,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786226872] [2021-03-10 21:23:55,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:55,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:55,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:55,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:55,840 INFO L87 Difference]: Start difference. First operand 1216 states and 3513 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:55,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:55,953 INFO L93 Difference]: Finished difference Result 1394 states and 3767 transitions. [2021-03-10 21:23:55,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:23:55,953 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:23:55,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:55,955 INFO L225 Difference]: With dead ends: 1394 [2021-03-10 21:23:55,955 INFO L226 Difference]: Without dead ends: 1390 [2021-03-10 21:23:55,955 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:23:55,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1390 states. [2021-03-10 21:23:55,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1390 to 1183. [2021-03-10 21:23:55,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1183 states, 1182 states have (on average 2.8705583756345177) internal successors, (3393), 1182 states have internal predecessors, (3393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:55,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1183 states to 1183 states and 3393 transitions. [2021-03-10 21:23:55,973 INFO L78 Accepts]: Start accepts. Automaton has 1183 states and 3393 transitions. Word has length 19 [2021-03-10 21:23:55,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:55,973 INFO L480 AbstractCegarLoop]: Abstraction has 1183 states and 3393 transitions. [2021-03-10 21:23:55,973 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:55,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1183 states and 3393 transitions. [2021-03-10 21:23:55,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:55,975 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:55,975 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:56,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable563,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:56,189 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:56,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:56,189 INFO L82 PathProgramCache]: Analyzing trace with hash 864144754, now seen corresponding path program 108 times [2021-03-10 21:23:56,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:56,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676933342] [2021-03-10 21:23:56,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:56,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:56,235 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:56,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676933342] [2021-03-10 21:23:56,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468921069] [2021-03-10 21:23:56,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:56,258 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:23:56,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:56,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:23:56,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:56,296 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 16 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:56,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:56,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:23:56,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769522028] [2021-03-10 21:23:56,297 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:23:56,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:56,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:23:56,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:23:56,297 INFO L87 Difference]: Start difference. First operand 1183 states and 3393 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:56,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:56,368 INFO L93 Difference]: Finished difference Result 1453 states and 3839 transitions. [2021-03-10 21:23:56,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:23:56,368 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:23:56,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:56,370 INFO L225 Difference]: With dead ends: 1453 [2021-03-10 21:23:56,370 INFO L226 Difference]: Without dead ends: 1453 [2021-03-10 21:23:56,370 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 53.5ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:23:56,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1453 states. [2021-03-10 21:23:56,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1453 to 1189. [2021-03-10 21:23:56,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1189 states, 1188 states have (on average 2.8678451178451176) internal successors, (3407), 1188 states have internal predecessors, (3407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:56,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1189 states to 1189 states and 3407 transitions. [2021-03-10 21:23:56,387 INFO L78 Accepts]: Start accepts. Automaton has 1189 states and 3407 transitions. Word has length 19 [2021-03-10 21:23:56,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:56,387 INFO L480 AbstractCegarLoop]: Abstraction has 1189 states and 3407 transitions. [2021-03-10 21:23:56,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:56,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1189 states and 3407 transitions. [2021-03-10 21:23:56,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:56,403 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:56,403 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:56,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-03-10 21:23:56,615 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:56,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:56,615 INFO L82 PathProgramCache]: Analyzing trace with hash -864902580, now seen corresponding path program 109 times [2021-03-10 21:23:56,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:56,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183359669] [2021-03-10 21:23:56,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:56,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:56,670 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:56,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183359669] [2021-03-10 21:23:56,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949559601] [2021-03-10 21:23:56,670 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:56,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:56,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:23:56,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:56,728 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 15 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:56,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:56,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:23:56,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917022241] [2021-03-10 21:23:56,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:56,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:56,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:56,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:56,729 INFO L87 Difference]: Start difference. First operand 1189 states and 3407 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:56,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:56,792 INFO L93 Difference]: Finished difference Result 1449 states and 3831 transitions. [2021-03-10 21:23:56,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:23:56,792 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:23:56,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:56,794 INFO L225 Difference]: With dead ends: 1449 [2021-03-10 21:23:56,794 INFO L226 Difference]: Without dead ends: 1449 [2021-03-10 21:23:56,794 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:23:56,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1449 states. [2021-03-10 21:23:56,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1449 to 1136. [2021-03-10 21:23:56,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1136 states, 1135 states have (on average 2.845814977973568) internal successors, (3230), 1135 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:56,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1136 states to 1136 states and 3230 transitions. [2021-03-10 21:23:56,806 INFO L78 Accepts]: Start accepts. Automaton has 1136 states and 3230 transitions. Word has length 19 [2021-03-10 21:23:56,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:56,806 INFO L480 AbstractCegarLoop]: Abstraction has 1136 states and 3230 transitions. [2021-03-10 21:23:56,806 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:56,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1136 states and 3230 transitions. [2021-03-10 21:23:56,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:56,807 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:56,807 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:57,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-03-10 21:23:57,007 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:57,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:57,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1369204914, now seen corresponding path program 110 times [2021-03-10 21:23:57,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:57,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459613821] [2021-03-10 21:23:57,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:57,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:57,059 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:57,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459613821] [2021-03-10 21:23:57,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466498038] [2021-03-10 21:23:57,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:57,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:57,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:57,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:23:57,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:57,116 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:57,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:57,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:23:57,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158913509] [2021-03-10 21:23:57,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:57,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:57,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:57,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:57,117 INFO L87 Difference]: Start difference. First operand 1136 states and 3230 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:57,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:57,168 INFO L93 Difference]: Finished difference Result 1670 states and 4515 transitions. [2021-03-10 21:23:57,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:23:57,168 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:23:57,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:57,170 INFO L225 Difference]: With dead ends: 1670 [2021-03-10 21:23:57,170 INFO L226 Difference]: Without dead ends: 1670 [2021-03-10 21:23:57,170 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 54.4ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:23:57,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1670 states. [2021-03-10 21:23:57,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1670 to 1470. [2021-03-10 21:23:57,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1470 states, 1469 states have (on average 2.888359428182437) internal successors, (4243), 1469 states have internal predecessors, (4243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:57,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1470 states to 1470 states and 4243 transitions. [2021-03-10 21:23:57,189 INFO L78 Accepts]: Start accepts. Automaton has 1470 states and 4243 transitions. Word has length 19 [2021-03-10 21:23:57,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:57,189 INFO L480 AbstractCegarLoop]: Abstraction has 1470 states and 4243 transitions. [2021-03-10 21:23:57,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:57,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1470 states and 4243 transitions. [2021-03-10 21:23:57,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:57,191 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:57,191 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:57,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable566 [2021-03-10 21:23:57,391 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:57,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:57,391 INFO L82 PathProgramCache]: Analyzing trace with hash 1907060492, now seen corresponding path program 111 times [2021-03-10 21:23:57,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:57,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126399729] [2021-03-10 21:23:57,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:57,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:57,442 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:57,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126399729] [2021-03-10 21:23:57,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61006009] [2021-03-10 21:23:57,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:57,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:23:57,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:57,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:23:57,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:57,496 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:57,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:57,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:23:57,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534974454] [2021-03-10 21:23:57,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:57,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:57,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:57,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:57,497 INFO L87 Difference]: Start difference. First operand 1470 states and 4243 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:57,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:57,592 INFO L93 Difference]: Finished difference Result 1718 states and 4617 transitions. [2021-03-10 21:23:57,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:23:57,592 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:23:57,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:57,594 INFO L225 Difference]: With dead ends: 1718 [2021-03-10 21:23:57,594 INFO L226 Difference]: Without dead ends: 1718 [2021-03-10 21:23:57,594 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 85.6ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:23:57,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1718 states. [2021-03-10 21:23:57,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1718 to 1404. [2021-03-10 21:23:57,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 2.879543834640057) internal successors, (4040), 1403 states have internal predecessors, (4040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:57,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 4040 transitions. [2021-03-10 21:23:57,608 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 4040 transitions. Word has length 19 [2021-03-10 21:23:57,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:57,608 INFO L480 AbstractCegarLoop]: Abstraction has 1404 states and 4040 transitions. [2021-03-10 21:23:57,608 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:57,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 4040 transitions. [2021-03-10 21:23:57,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:57,610 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:57,610 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:57,810 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable567,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:57,810 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:57,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:57,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1400714226, now seen corresponding path program 112 times [2021-03-10 21:23:57,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:57,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500604020] [2021-03-10 21:23:57,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:57,872 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:57,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500604020] [2021-03-10 21:23:57,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013341911] [2021-03-10 21:23:57,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:23:57,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:23:57,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:57,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:23:57,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:57,952 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:57,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:57,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:23:57,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937143497] [2021-03-10 21:23:57,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:57,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:57,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:57,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:57,953 INFO L87 Difference]: Start difference. First operand 1404 states and 4040 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:58,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:58,162 INFO L93 Difference]: Finished difference Result 1961 states and 5383 transitions. [2021-03-10 21:23:58,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:23:58,163 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:23:58,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:58,165 INFO L225 Difference]: With dead ends: 1961 [2021-03-10 21:23:58,165 INFO L226 Difference]: Without dead ends: 1961 [2021-03-10 21:23:58,166 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 177.7ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:23:58,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1961 states. [2021-03-10 21:23:58,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1961 to 1643. [2021-03-10 21:23:58,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1643 states, 1642 states have (on average 2.933617539585871) internal successors, (4817), 1642 states have internal predecessors, (4817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:58,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1643 states to 1643 states and 4817 transitions. [2021-03-10 21:23:58,189 INFO L78 Accepts]: Start accepts. Automaton has 1643 states and 4817 transitions. Word has length 19 [2021-03-10 21:23:58,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:58,190 INFO L480 AbstractCegarLoop]: Abstraction has 1643 states and 4817 transitions. [2021-03-10 21:23:58,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:58,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1643 states and 4817 transitions. [2021-03-10 21:23:58,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:58,192 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:58,192 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:58,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable568 [2021-03-10 21:23:58,399 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:58,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:58,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1043037158, now seen corresponding path program 113 times [2021-03-10 21:23:58,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:58,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608742895] [2021-03-10 21:23:58,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:58,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:58,449 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:58,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608742895] [2021-03-10 21:23:58,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726162132] [2021-03-10 21:23:58,449 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:58,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:23:58,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:58,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:23:58,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:58,496 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:58,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:58,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:23:58,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575281178] [2021-03-10 21:23:58,496 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:58,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:58,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:58,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:58,497 INFO L87 Difference]: Start difference. First operand 1643 states and 4817 transitions. Second operand has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:58,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:58,631 INFO L93 Difference]: Finished difference Result 1862 states and 5178 transitions. [2021-03-10 21:23:58,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:23:58,631 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:23:58,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:58,633 INFO L225 Difference]: With dead ends: 1862 [2021-03-10 21:23:58,633 INFO L226 Difference]: Without dead ends: 1856 [2021-03-10 21:23:58,633 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:23:58,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1856 states. [2021-03-10 21:23:58,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1856 to 1674. [2021-03-10 21:23:58,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1674 states, 1673 states have (on average 2.9414225941422596) internal successors, (4921), 1673 states have internal predecessors, (4921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:58,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1674 states to 1674 states and 4921 transitions. [2021-03-10 21:23:58,651 INFO L78 Accepts]: Start accepts. Automaton has 1674 states and 4921 transitions. Word has length 19 [2021-03-10 21:23:58,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:58,651 INFO L480 AbstractCegarLoop]: Abstraction has 1674 states and 4921 transitions. [2021-03-10 21:23:58,651 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.75) internal successors, (21), 11 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:58,651 INFO L276 IsEmpty]: Start isEmpty. Operand 1674 states and 4921 transitions. [2021-03-10 21:23:58,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:58,652 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:58,652 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:58,853 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable569,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:58,853 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:58,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:58,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1871868906, now seen corresponding path program 114 times [2021-03-10 21:23:58,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:58,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175686305] [2021-03-10 21:23:58,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:58,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:58,901 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:58,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175686305] [2021-03-10 21:23:58,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774745081] [2021-03-10 21:23:58,902 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:58,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:23:58,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:58,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:23:58,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:58,960 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 14 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:23:58,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:58,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:23:58,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606372864] [2021-03-10 21:23:58,960 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:23:58,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:58,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:23:58,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:23:58,960 INFO L87 Difference]: Start difference. First operand 1674 states and 4921 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:59,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:59,016 INFO L93 Difference]: Finished difference Result 1907 states and 5367 transitions. [2021-03-10 21:23:59,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:23:59,016 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:23:59,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:59,018 INFO L225 Difference]: With dead ends: 1907 [2021-03-10 21:23:59,018 INFO L226 Difference]: Without dead ends: 1907 [2021-03-10 21:23:59,018 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:23:59,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1907 states. [2021-03-10 21:23:59,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1907 to 1673. [2021-03-10 21:23:59,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1673 states, 1672 states have (on average 2.9318181818181817) internal successors, (4902), 1672 states have internal predecessors, (4902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:59,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1673 states to 1673 states and 4902 transitions. [2021-03-10 21:23:59,036 INFO L78 Accepts]: Start accepts. Automaton has 1673 states and 4902 transitions. Word has length 19 [2021-03-10 21:23:59,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:59,036 INFO L480 AbstractCegarLoop]: Abstraction has 1673 states and 4902 transitions. [2021-03-10 21:23:59,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:59,036 INFO L276 IsEmpty]: Start isEmpty. Operand 1673 states and 4902 transitions. [2021-03-10 21:23:59,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:59,038 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:59,038 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:59,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:59,238 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:59,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:59,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1885242812, now seen corresponding path program 115 times [2021-03-10 21:23:59,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:59,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510502589] [2021-03-10 21:23:59,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:59,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:59,291 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:59,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510502589] [2021-03-10 21:23:59,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117171194] [2021-03-10 21:23:59,291 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:59,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:59,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:23:59,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:59,352 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:59,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:59,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:23:59,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405866626] [2021-03-10 21:23:59,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:59,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:59,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:59,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:59,352 INFO L87 Difference]: Start difference. First operand 1673 states and 4902 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:59,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:59,456 INFO L93 Difference]: Finished difference Result 1965 states and 5492 transitions. [2021-03-10 21:23:59,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:23:59,456 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:23:59,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:59,458 INFO L225 Difference]: With dead ends: 1965 [2021-03-10 21:23:59,458 INFO L226 Difference]: Without dead ends: 1965 [2021-03-10 21:23:59,458 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 92.3ms TimeCoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:23:59,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1965 states. [2021-03-10 21:23:59,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1965 to 1412. [2021-03-10 21:23:59,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1411 states have (on average 2.888731396172927) internal successors, (4076), 1411 states have internal predecessors, (4076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:59,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 4076 transitions. [2021-03-10 21:23:59,477 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 4076 transitions. Word has length 19 [2021-03-10 21:23:59,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:59,477 INFO L480 AbstractCegarLoop]: Abstraction has 1412 states and 4076 transitions. [2021-03-10 21:23:59,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:59,477 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 4076 transitions. [2021-03-10 21:23:59,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:59,478 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:59,478 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:23:59,678 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:59,679 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:23:59,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:23:59,679 INFO L82 PathProgramCache]: Analyzing trace with hash 1903378218, now seen corresponding path program 116 times [2021-03-10 21:23:59,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:23:59,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473305161] [2021-03-10 21:23:59,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:23:59,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:23:59,740 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:59,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473305161] [2021-03-10 21:23:59,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953180021] [2021-03-10 21:23:59,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:23:59,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:23:59,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:23:59,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:23:59,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:23:59,812 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:23:59,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:23:59,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:23:59,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242231693] [2021-03-10 21:23:59,814 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:23:59,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:23:59,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:23:59,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:23:59,815 INFO L87 Difference]: Start difference. First operand 1412 states and 4076 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:59,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:23:59,975 INFO L93 Difference]: Finished difference Result 1975 states and 5352 transitions. [2021-03-10 21:23:59,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:23:59,975 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:23:59,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:23:59,977 INFO L225 Difference]: With dead ends: 1975 [2021-03-10 21:23:59,977 INFO L226 Difference]: Without dead ends: 1975 [2021-03-10 21:23:59,977 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 143.5ms TimeCoverageRelationStatistics Valid=220, Invalid=430, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:23:59,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1975 states. [2021-03-10 21:23:59,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1975 to 1385. [2021-03-10 21:23:59,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1385 states, 1384 states have (on average 2.9010115606936417) internal successors, (4015), 1384 states have internal predecessors, (4015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:59,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1385 states to 1385 states and 4015 transitions. [2021-03-10 21:23:59,992 INFO L78 Accepts]: Start accepts. Automaton has 1385 states and 4015 transitions. Word has length 19 [2021-03-10 21:23:59,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:23:59,992 INFO L480 AbstractCegarLoop]: Abstraction has 1385 states and 4015 transitions. [2021-03-10 21:23:59,992 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:23:59,992 INFO L276 IsEmpty]: Start isEmpty. Operand 1385 states and 4015 transitions. [2021-03-10 21:23:59,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:23:59,994 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:23:59,994 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:00,195 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable572,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:00,196 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:00,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:00,196 INFO L82 PathProgramCache]: Analyzing trace with hash 2143162372, now seen corresponding path program 117 times [2021-03-10 21:24:00,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:00,196 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828736120] [2021-03-10 21:24:00,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:00,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:00,249 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:00,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828736120] [2021-03-10 21:24:00,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890066807] [2021-03-10 21:24:00,249 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:00,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:24:00,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:00,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:00,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:00,297 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:00,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:00,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:24:00,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223383542] [2021-03-10 21:24:00,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:24:00,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:00,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:24:00,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:24:00,298 INFO L87 Difference]: Start difference. First operand 1385 states and 4015 transitions. Second operand has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:00,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:00,412 INFO L93 Difference]: Finished difference Result 1517 states and 4176 transitions. [2021-03-10 21:24:00,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:24:00,412 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:24:00,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:00,413 INFO L225 Difference]: With dead ends: 1517 [2021-03-10 21:24:00,413 INFO L226 Difference]: Without dead ends: 1513 [2021-03-10 21:24:00,414 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 81.2ms TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:24:00,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1513 states. [2021-03-10 21:24:00,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1513 to 1380. [2021-03-10 21:24:00,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 2.897026831036983) internal successors, (3995), 1379 states have internal predecessors, (3995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:00,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 3995 transitions. [2021-03-10 21:24:00,428 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 3995 transitions. Word has length 19 [2021-03-10 21:24:00,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:00,428 INFO L480 AbstractCegarLoop]: Abstraction has 1380 states and 3995 transitions. [2021-03-10 21:24:00,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.9090909090909092) internal successors, (21), 10 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:00,428 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 3995 transitions. [2021-03-10 21:24:00,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:24:00,430 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:00,430 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:00,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2021-03-10 21:24:00,651 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:00,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:00,651 INFO L82 PathProgramCache]: Analyzing trace with hash 1266911364, now seen corresponding path program 118 times [2021-03-10 21:24:00,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:00,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985449607] [2021-03-10 21:24:00,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:00,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:00,714 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:00,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985449607] [2021-03-10 21:24:00,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496967188] [2021-03-10 21:24:00,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:00,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:24:00,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:00,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:00,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:00,791 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:00,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:00,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:24:00,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474189803] [2021-03-10 21:24:00,791 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:24:00,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:00,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:24:00,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:00,792 INFO L87 Difference]: Start difference. First operand 1380 states and 3995 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:00,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:00,982 INFO L93 Difference]: Finished difference Result 1622 states and 4384 transitions. [2021-03-10 21:24:00,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:24:00,983 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:24:00,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:00,985 INFO L225 Difference]: With dead ends: 1622 [2021-03-10 21:24:00,985 INFO L226 Difference]: Without dead ends: 1622 [2021-03-10 21:24:00,985 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 168.7ms TimeCoverageRelationStatistics Valid=223, Invalid=427, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:24:00,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1622 states. [2021-03-10 21:24:01,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1622 to 1221. [2021-03-10 21:24:01,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 2.8721311475409834) internal successors, (3504), 1220 states have internal predecessors, (3504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:01,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 3504 transitions. [2021-03-10 21:24:01,004 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 3504 transitions. Word has length 19 [2021-03-10 21:24:01,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:01,004 INFO L480 AbstractCegarLoop]: Abstraction has 1221 states and 3504 transitions. [2021-03-10 21:24:01,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:01,004 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 3504 transitions. [2021-03-10 21:24:01,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:24:01,005 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:01,005 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:01,226 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable574 [2021-03-10 21:24:01,227 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:01,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:01,227 INFO L82 PathProgramCache]: Analyzing trace with hash 2040102950, now seen corresponding path program 119 times [2021-03-10 21:24:01,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:01,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137975385] [2021-03-10 21:24:01,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:01,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:01,267 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:01,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137975385] [2021-03-10 21:24:01,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863734999] [2021-03-10 21:24:01,267 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:01,290 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:24:01,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:01,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:01,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:01,322 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:01,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:01,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:24:01,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039253667] [2021-03-10 21:24:01,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:24:01,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:01,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:24:01,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:24:01,323 INFO L87 Difference]: Start difference. First operand 1221 states and 3504 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:01,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:01,422 INFO L93 Difference]: Finished difference Result 1376 states and 3711 transitions. [2021-03-10 21:24:01,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:24:01,422 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:24:01,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:01,424 INFO L225 Difference]: With dead ends: 1376 [2021-03-10 21:24:01,424 INFO L226 Difference]: Without dead ends: 1372 [2021-03-10 21:24:01,424 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=112, Invalid=194, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:24:01,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1372 states. [2021-03-10 21:24:01,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1372 to 1231. [2021-03-10 21:24:01,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1231 states, 1230 states have (on average 2.873170731707317) internal successors, (3534), 1230 states have internal predecessors, (3534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:01,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1231 states to 1231 states and 3534 transitions. [2021-03-10 21:24:01,442 INFO L78 Accepts]: Start accepts. Automaton has 1231 states and 3534 transitions. Word has length 19 [2021-03-10 21:24:01,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:01,442 INFO L480 AbstractCegarLoop]: Abstraction has 1231 states and 3534 transitions. [2021-03-10 21:24:01,442 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:01,443 INFO L276 IsEmpty]: Start isEmpty. Operand 1231 states and 3534 transitions. [2021-03-10 21:24:01,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:24:01,444 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:01,444 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:01,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-03-10 21:24:01,666 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:01,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:01,667 INFO L82 PathProgramCache]: Analyzing trace with hash -537115286, now seen corresponding path program 120 times [2021-03-10 21:24:01,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:01,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [826303382] [2021-03-10 21:24:01,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:01,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:01,715 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:01,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [826303382] [2021-03-10 21:24:01,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238212014] [2021-03-10 21:24:01,715 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:01,754 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:24:01,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:01,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:01,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:01,788 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:01,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:01,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:24:01,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002905373] [2021-03-10 21:24:01,789 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:24:01,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:01,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:24:01,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:24:01,789 INFO L87 Difference]: Start difference. First operand 1231 states and 3534 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:01,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:01,858 INFO L93 Difference]: Finished difference Result 1459 states and 3899 transitions. [2021-03-10 21:24:01,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:24:01,858 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:24:01,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:01,860 INFO L225 Difference]: With dead ends: 1459 [2021-03-10 21:24:01,860 INFO L226 Difference]: Without dead ends: 1459 [2021-03-10 21:24:01,860 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 61.5ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:24:01,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1459 states. [2021-03-10 21:24:01,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1459 to 1232. [2021-03-10 21:24:01,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1232 states, 1231 states have (on average 2.8732737611697807) internal successors, (3537), 1231 states have internal predecessors, (3537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:01,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1232 states to 1232 states and 3537 transitions. [2021-03-10 21:24:01,873 INFO L78 Accepts]: Start accepts. Automaton has 1232 states and 3537 transitions. Word has length 19 [2021-03-10 21:24:01,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:01,873 INFO L480 AbstractCegarLoop]: Abstraction has 1232 states and 3537 transitions. [2021-03-10 21:24:01,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:01,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1232 states and 3537 transitions. [2021-03-10 21:24:01,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:24:01,874 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:01,874 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:02,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-03-10 21:24:02,075 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:02,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:02,075 INFO L82 PathProgramCache]: Analyzing trace with hash 2028804676, now seen corresponding path program 121 times [2021-03-10 21:24:02,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:02,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821118474] [2021-03-10 21:24:02,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:02,119 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:02,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821118474] [2021-03-10 21:24:02,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115405403] [2021-03-10 21:24:02,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:02,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:02,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:02,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:02,174 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:02,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:02,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-03-10 21:24:02,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897372418] [2021-03-10 21:24:02,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:24:02,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:02,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:24:02,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:24:02,175 INFO L87 Difference]: Start difference. First operand 1232 states and 3537 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:02,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:02,274 INFO L93 Difference]: Finished difference Result 1479 states and 3939 transitions. [2021-03-10 21:24:02,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:24:02,274 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:24:02,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:02,275 INFO L225 Difference]: With dead ends: 1479 [2021-03-10 21:24:02,275 INFO L226 Difference]: Without dead ends: 1479 [2021-03-10 21:24:02,276 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:24:02,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1479 states. [2021-03-10 21:24:02,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1479 to 1233. [2021-03-10 21:24:02,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1233 states, 1232 states have (on average 2.8733766233766236) internal successors, (3540), 1232 states have internal predecessors, (3540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:02,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1233 states to 1233 states and 3540 transitions. [2021-03-10 21:24:02,288 INFO L78 Accepts]: Start accepts. Automaton has 1233 states and 3540 transitions. Word has length 19 [2021-03-10 21:24:02,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:02,289 INFO L480 AbstractCegarLoop]: Abstraction has 1233 states and 3540 transitions. [2021-03-10 21:24:02,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:02,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1233 states and 3540 transitions. [2021-03-10 21:24:02,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:24:02,290 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:02,290 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:02,495 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable577,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:02,495 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:02,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:02,495 INFO L82 PathProgramCache]: Analyzing trace with hash -32055126, now seen corresponding path program 122 times [2021-03-10 21:24:02,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:02,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339620253] [2021-03-10 21:24:02,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:02,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:02,543 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:02,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339620253] [2021-03-10 21:24:02,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519185212] [2021-03-10 21:24:02,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:02,561 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:24:02,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:02,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:02,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:02,599 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:02,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:02,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:24:02,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026066010] [2021-03-10 21:24:02,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:24:02,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:02,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:24:02,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:24:02,600 INFO L87 Difference]: Start difference. First operand 1233 states and 3540 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:02,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:02,684 INFO L93 Difference]: Finished difference Result 1443 states and 3863 transitions. [2021-03-10 21:24:02,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:24:02,684 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:24:02,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:02,686 INFO L225 Difference]: With dead ends: 1443 [2021-03-10 21:24:02,686 INFO L226 Difference]: Without dead ends: 1443 [2021-03-10 21:24:02,686 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 80.3ms TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:24:02,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2021-03-10 21:24:02,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1226. [2021-03-10 21:24:02,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1226 states, 1225 states have (on average 2.874285714285714) internal successors, (3521), 1225 states have internal predecessors, (3521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:02,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1226 states to 1226 states and 3521 transitions. [2021-03-10 21:24:02,698 INFO L78 Accepts]: Start accepts. Automaton has 1226 states and 3521 transitions. Word has length 19 [2021-03-10 21:24:02,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:02,698 INFO L480 AbstractCegarLoop]: Abstraction has 1226 states and 3521 transitions. [2021-03-10 21:24:02,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:02,698 INFO L276 IsEmpty]: Start isEmpty. Operand 1226 states and 3521 transitions. [2021-03-10 21:24:02,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:24:02,700 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:02,700 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:02,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable578 [2021-03-10 21:24:02,900 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:02,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:02,900 INFO L82 PathProgramCache]: Analyzing trace with hash 505800452, now seen corresponding path program 123 times [2021-03-10 21:24:02,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:02,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060910606] [2021-03-10 21:24:02,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:02,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:02,951 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:02,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060910606] [2021-03-10 21:24:02,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236873325] [2021-03-10 21:24:02,952 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:02,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:24:02,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:02,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:02,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:03,023 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:03,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:03,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:24:03,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344032212] [2021-03-10 21:24:03,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:24:03,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:03,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:24:03,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:24:03,024 INFO L87 Difference]: Start difference. First operand 1226 states and 3521 transitions. Second operand has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:03,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:03,093 INFO L93 Difference]: Finished difference Result 1646 states and 4470 transitions. [2021-03-10 21:24:03,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:24:03,094 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:24:03,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:03,095 INFO L225 Difference]: With dead ends: 1646 [2021-03-10 21:24:03,095 INFO L226 Difference]: Without dead ends: 1646 [2021-03-10 21:24:03,095 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 75.4ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:24:03,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1646 states. [2021-03-10 21:24:03,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1646 to 1435. [2021-03-10 21:24:03,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1434 states have (on average 2.8870292887029287) internal successors, (4140), 1434 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:03,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 4140 transitions. [2021-03-10 21:24:03,109 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 4140 transitions. Word has length 19 [2021-03-10 21:24:03,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:03,109 INFO L480 AbstractCegarLoop]: Abstraction has 1435 states and 4140 transitions. [2021-03-10 21:24:03,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:03,109 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 4140 transitions. [2021-03-10 21:24:03,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:24:03,110 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:03,110 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:03,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-03-10 21:24:03,312 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:03,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:03,312 INFO L82 PathProgramCache]: Analyzing trace with hash -545814, now seen corresponding path program 124 times [2021-03-10 21:24:03,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:03,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216944067] [2021-03-10 21:24:03,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:03,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:03,372 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:03,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216944067] [2021-03-10 21:24:03,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765236868] [2021-03-10 21:24:03,373 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:03,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:24:03,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:03,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:03,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:03,429 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:03,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:03,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:24:03,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076952939] [2021-03-10 21:24:03,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:24:03,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:03,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:24:03,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:03,431 INFO L87 Difference]: Start difference. First operand 1435 states and 4140 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:03,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:03,580 INFO L93 Difference]: Finished difference Result 1661 states and 4495 transitions. [2021-03-10 21:24:03,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:24:03,581 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:24:03,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:03,583 INFO L225 Difference]: With dead ends: 1661 [2021-03-10 21:24:03,583 INFO L226 Difference]: Without dead ends: 1661 [2021-03-10 21:24:03,583 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:03,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1661 states. [2021-03-10 21:24:03,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1661 to 1435. [2021-03-10 21:24:03,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1435 states, 1434 states have (on average 2.8870292887029287) internal successors, (4140), 1434 states have internal predecessors, (4140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:03,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1435 states to 1435 states and 4140 transitions. [2021-03-10 21:24:03,612 INFO L78 Accepts]: Start accepts. Automaton has 1435 states and 4140 transitions. Word has length 19 [2021-03-10 21:24:03,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:03,613 INFO L480 AbstractCegarLoop]: Abstraction has 1435 states and 4140 transitions. [2021-03-10 21:24:03,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:03,613 INFO L276 IsEmpty]: Start isEmpty. Operand 1435 states and 4140 transitions. [2021-03-10 21:24:03,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:24:03,614 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:03,615 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:03,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:03,831 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:03,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:03,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1482589124, now seen corresponding path program 125 times [2021-03-10 21:24:03,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:03,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331774778] [2021-03-10 21:24:03,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:03,889 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:03,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331774778] [2021-03-10 21:24:03,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923626201] [2021-03-10 21:24:03,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:03,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:24:03,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:03,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:03,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:03,949 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:03,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:03,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:24:03,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460643682] [2021-03-10 21:24:03,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:24:03,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:03,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:24:03,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:03,950 INFO L87 Difference]: Start difference. First operand 1435 states and 4140 transitions. Second operand has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:04,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:04,154 INFO L93 Difference]: Finished difference Result 1853 states and 5030 transitions. [2021-03-10 21:24:04,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:24:04,155 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:24:04,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:04,156 INFO L225 Difference]: With dead ends: 1853 [2021-03-10 21:24:04,156 INFO L226 Difference]: Without dead ends: 1853 [2021-03-10 21:24:04,156 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 181.4ms TimeCoverageRelationStatistics Valid=293, Invalid=577, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:24:04,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1853 states. [2021-03-10 21:24:04,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1853 to 1564. [2021-03-10 21:24:04,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1564 states, 1563 states have (on average 2.9021113243762) internal successors, (4536), 1563 states have internal predecessors, (4536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:04,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1564 states to 1564 states and 4536 transitions. [2021-03-10 21:24:04,172 INFO L78 Accepts]: Start accepts. Automaton has 1564 states and 4536 transitions. Word has length 19 [2021-03-10 21:24:04,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:04,172 INFO L480 AbstractCegarLoop]: Abstraction has 1564 states and 4536 transitions. [2021-03-10 21:24:04,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 13 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:04,172 INFO L276 IsEmpty]: Start isEmpty. Operand 1564 states and 4536 transitions. [2021-03-10 21:24:04,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:24:04,174 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:04,174 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:04,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:04,391 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:04,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:04,391 INFO L82 PathProgramCache]: Analyzing trace with hash -554248274, now seen corresponding path program 126 times [2021-03-10 21:24:04,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:04,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692529428] [2021-03-10 21:24:04,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:04,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:04,459 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:04,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692529428] [2021-03-10 21:24:04,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860673792] [2021-03-10 21:24:04,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:04,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:24:04,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:04,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:04,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:04,514 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:04,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:04,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-03-10 21:24:04,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737766055] [2021-03-10 21:24:04,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:24:04,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:04,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:24:04,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:04,515 INFO L87 Difference]: Start difference. First operand 1564 states and 4536 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:04,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:04,695 INFO L93 Difference]: Finished difference Result 1749 states and 4790 transitions. [2021-03-10 21:24:04,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:24:04,695 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:24:04,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:04,697 INFO L225 Difference]: With dead ends: 1749 [2021-03-10 21:24:04,697 INFO L226 Difference]: Without dead ends: 1743 [2021-03-10 21:24:04,697 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 153.3ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:24:04,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2021-03-10 21:24:04,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 1529. [2021-03-10 21:24:04,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1529 states, 1528 states have (on average 2.8841623036649215) internal successors, (4407), 1528 states have internal predecessors, (4407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:04,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1529 states to 1529 states and 4407 transitions. [2021-03-10 21:24:04,717 INFO L78 Accepts]: Start accepts. Automaton has 1529 states and 4407 transitions. Word has length 19 [2021-03-10 21:24:04,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:04,717 INFO L480 AbstractCegarLoop]: Abstraction has 1529 states and 4407 transitions. [2021-03-10 21:24:04,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:04,717 INFO L276 IsEmpty]: Start isEmpty. Operand 1529 states and 4407 transitions. [2021-03-10 21:24:04,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:24:04,719 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:04,719 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:04,935 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:04,935 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:04,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:04,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1091484980, now seen corresponding path program 127 times [2021-03-10 21:24:04,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:04,935 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133979445] [2021-03-10 21:24:04,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:04,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:04,991 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:04,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133979445] [2021-03-10 21:24:04,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638706639] [2021-03-10 21:24:04,991 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:05,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:05,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:05,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:05,089 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:05,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:05,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-03-10 21:24:05,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380502770] [2021-03-10 21:24:05,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:24:05,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:05,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:24:05,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:05,090 INFO L87 Difference]: Start difference. First operand 1529 states and 4407 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:05,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:05,228 INFO L93 Difference]: Finished difference Result 1732 states and 4850 transitions. [2021-03-10 21:24:05,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:24:05,228 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:24:05,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:05,230 INFO L225 Difference]: With dead ends: 1732 [2021-03-10 21:24:05,230 INFO L226 Difference]: Without dead ends: 1732 [2021-03-10 21:24:05,230 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 146.5ms TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:05,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2021-03-10 21:24:05,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1596. [2021-03-10 21:24:05,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1596 states, 1595 states have (on average 2.889655172413793) internal successors, (4609), 1595 states have internal predecessors, (4609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:05,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1596 states to 1596 states and 4609 transitions. [2021-03-10 21:24:05,247 INFO L78 Accepts]: Start accepts. Automaton has 1596 states and 4609 transitions. Word has length 19 [2021-03-10 21:24:05,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:05,247 INFO L480 AbstractCegarLoop]: Abstraction has 1596 states and 4609 transitions. [2021-03-10 21:24:05,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:05,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1596 states and 4609 transitions. [2021-03-10 21:24:05,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:24:05,248 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:05,248 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:05,450 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:05,450 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:05,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:05,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1597831246, now seen corresponding path program 128 times [2021-03-10 21:24:05,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:05,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768430462] [2021-03-10 21:24:05,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:05,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:05,511 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:05,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768430462] [2021-03-10 21:24:05,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984358422] [2021-03-10 21:24:05,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:05,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:24:05,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:05,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:05,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:05,581 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:05,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:05,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-03-10 21:24:05,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557857918] [2021-03-10 21:24:05,582 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:24:05,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:05,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:24:05,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:24:05,582 INFO L87 Difference]: Start difference. First operand 1596 states and 4609 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:05,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:05,811 INFO L93 Difference]: Finished difference Result 1746 states and 4863 transitions. [2021-03-10 21:24:05,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:24:05,812 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:24:05,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:05,813 INFO L225 Difference]: With dead ends: 1746 [2021-03-10 21:24:05,813 INFO L226 Difference]: Without dead ends: 1746 [2021-03-10 21:24:05,813 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 203.7ms TimeCoverageRelationStatistics Valid=331, Invalid=661, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:24:05,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2021-03-10 21:24:05,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1507. [2021-03-10 21:24:05,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1507 states, 1506 states have (on average 2.8771580345285526) internal successors, (4333), 1506 states have internal predecessors, (4333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:05,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1507 states to 1507 states and 4333 transitions. [2021-03-10 21:24:05,828 INFO L78 Accepts]: Start accepts. Automaton has 1507 states and 4333 transitions. Word has length 19 [2021-03-10 21:24:05,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:05,828 INFO L480 AbstractCegarLoop]: Abstraction has 1507 states and 4333 transitions. [2021-03-10 21:24:05,828 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:05,828 INFO L276 IsEmpty]: Start isEmpty. Operand 1507 states and 4333 transitions. [2021-03-10 21:24:05,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:24:05,829 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:05,829 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:06,030 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable584 [2021-03-10 21:24:06,030 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:06,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:06,030 INFO L82 PathProgramCache]: Analyzing trace with hash -114696308, now seen corresponding path program 129 times [2021-03-10 21:24:06,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:06,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265002884] [2021-03-10 21:24:06,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:06,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:06,106 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:06,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265002884] [2021-03-10 21:24:06,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056560387] [2021-03-10 21:24:06,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:06,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:24:06,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:06,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:06,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:06,180 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:06,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:06,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-03-10 21:24:06,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201257011] [2021-03-10 21:24:06,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:24:06,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:06,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:24:06,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:24:06,181 INFO L87 Difference]: Start difference. First operand 1507 states and 4333 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:06,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:06,484 INFO L93 Difference]: Finished difference Result 1884 states and 5161 transitions. [2021-03-10 21:24:06,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:24:06,484 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:24:06,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:06,486 INFO L225 Difference]: With dead ends: 1884 [2021-03-10 21:24:06,486 INFO L226 Difference]: Without dead ends: 1884 [2021-03-10 21:24:06,486 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 280.7ms TimeCoverageRelationStatistics Valid=395, Invalid=795, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:24:06,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1884 states. [2021-03-10 21:24:06,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1884 to 1484. [2021-03-10 21:24:06,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 2.8792987188132164) internal successors, (4270), 1483 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:06,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 4270 transitions. [2021-03-10 21:24:06,501 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 4270 transitions. Word has length 19 [2021-03-10 21:24:06,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:06,501 INFO L480 AbstractCegarLoop]: Abstraction has 1484 states and 4270 transitions. [2021-03-10 21:24:06,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:06,501 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 4270 transitions. [2021-03-10 21:24:06,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:24:06,502 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:06,502 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:06,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable585,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:06,703 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:06,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:06,703 INFO L82 PathProgramCache]: Analyzing trace with hash -2004726350, now seen corresponding path program 130 times [2021-03-10 21:24:06,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:06,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457707924] [2021-03-10 21:24:06,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:06,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:06,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457707924] [2021-03-10 21:24:06,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238691673] [2021-03-10 21:24:06,767 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:06,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:24:06,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:06,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:06,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:06,826 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:06,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:06,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 13 [2021-03-10 21:24:06,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024316870] [2021-03-10 21:24:06,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:24:06,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:06,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:24:06,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:06,827 INFO L87 Difference]: Start difference. First operand 1484 states and 4270 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:06,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:06,980 INFO L93 Difference]: Finished difference Result 1607 states and 4421 transitions. [2021-03-10 21:24:06,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:24:06,980 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:24:06,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:06,981 INFO L225 Difference]: With dead ends: 1607 [2021-03-10 21:24:06,981 INFO L226 Difference]: Without dead ends: 1603 [2021-03-10 21:24:06,982 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 133.1ms TimeCoverageRelationStatistics Valid=185, Invalid=367, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:06,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1603 states. [2021-03-10 21:24:06,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1603 to 1484. [2021-03-10 21:24:06,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 2.8772757923128793) internal successors, (4267), 1483 states have internal predecessors, (4267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:06,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 4267 transitions. [2021-03-10 21:24:06,996 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 4267 transitions. Word has length 19 [2021-03-10 21:24:06,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:06,996 INFO L480 AbstractCegarLoop]: Abstraction has 1484 states and 4267 transitions. [2021-03-10 21:24:06,996 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:06,996 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 4267 transitions. [2021-03-10 21:24:06,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:24:06,997 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:06,997 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:07,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable586 [2021-03-10 21:24:07,211 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:07,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:07,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1629667698, now seen corresponding path program 131 times [2021-03-10 21:24:07,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:07,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122651770] [2021-03-10 21:24:07,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:07,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:07,280 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:07,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122651770] [2021-03-10 21:24:07,280 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708723525] [2021-03-10 21:24:07,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:07,298 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:24:07,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:07,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:07,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:07,353 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:07,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:07,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-03-10 21:24:07,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115388491] [2021-03-10 21:24:07,353 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:24:07,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:07,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:24:07,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:24:07,353 INFO L87 Difference]: Start difference. First operand 1484 states and 4267 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:07,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:07,597 INFO L93 Difference]: Finished difference Result 1883 states and 5198 transitions. [2021-03-10 21:24:07,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:24:07,598 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:24:07,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:07,599 INFO L225 Difference]: With dead ends: 1883 [2021-03-10 21:24:07,599 INFO L226 Difference]: Without dead ends: 1883 [2021-03-10 21:24:07,600 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 218.1ms TimeCoverageRelationStatistics Valid=331, Invalid=725, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:24:07,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2021-03-10 21:24:07,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 1685. [2021-03-10 21:24:07,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1685 states, 1684 states have (on average 2.8966745843230406) internal successors, (4878), 1684 states have internal predecessors, (4878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:07,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1685 states to 1685 states and 4878 transitions. [2021-03-10 21:24:07,620 INFO L78 Accepts]: Start accepts. Automaton has 1685 states and 4878 transitions. Word has length 19 [2021-03-10 21:24:07,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:07,620 INFO L480 AbstractCegarLoop]: Abstraction has 1685 states and 4878 transitions. [2021-03-10 21:24:07,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:07,620 INFO L276 IsEmpty]: Start isEmpty. Operand 1685 states and 4878 transitions. [2021-03-10 21:24:07,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:24:07,622 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:07,622 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:07,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-03-10 21:24:07,839 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:07,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:07,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1550714670, now seen corresponding path program 132 times [2021-03-10 21:24:07,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:07,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391208510] [2021-03-10 21:24:07,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:07,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:07,905 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:07,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391208510] [2021-03-10 21:24:07,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631142654] [2021-03-10 21:24:07,906 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:07,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:24:07,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:07,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:07,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:07,967 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:07,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:07,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 13 [2021-03-10 21:24:07,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705538438] [2021-03-10 21:24:07,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:24:07,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:07,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:24:07,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:07,968 INFO L87 Difference]: Start difference. First operand 1685 states and 4878 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:08,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:08,087 INFO L93 Difference]: Finished difference Result 1804 states and 5036 transitions. [2021-03-10 21:24:08,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:24:08,087 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:24:08,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:08,089 INFO L225 Difference]: With dead ends: 1804 [2021-03-10 21:24:08,089 INFO L226 Difference]: Without dead ends: 1802 [2021-03-10 21:24:08,089 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 112.6ms TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:24:08,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1802 states. [2021-03-10 21:24:08,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1802 to 1697. [2021-03-10 21:24:08,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1697 states, 1696 states have (on average 2.8985849056603774) internal successors, (4916), 1696 states have internal predecessors, (4916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:08,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1697 states to 1697 states and 4916 transitions. [2021-03-10 21:24:08,105 INFO L78 Accepts]: Start accepts. Automaton has 1697 states and 4916 transitions. Word has length 19 [2021-03-10 21:24:08,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:08,105 INFO L480 AbstractCegarLoop]: Abstraction has 1697 states and 4916 transitions. [2021-03-10 21:24:08,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:08,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1697 states and 4916 transitions. [2021-03-10 21:24:08,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:24:08,106 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:08,106 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:08,307 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable588 [2021-03-10 21:24:08,307 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:08,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:08,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1026503566, now seen corresponding path program 133 times [2021-03-10 21:24:08,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:08,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038607407] [2021-03-10 21:24:08,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:08,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:08,371 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:08,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038607407] [2021-03-10 21:24:08,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220898420] [2021-03-10 21:24:08,372 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:08,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:08,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:08,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:08,430 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:08,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:08,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 13 [2021-03-10 21:24:08,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926486767] [2021-03-10 21:24:08,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:24:08,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:08,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:24:08,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:08,430 INFO L87 Difference]: Start difference. First operand 1697 states and 4916 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:08,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:08,551 INFO L93 Difference]: Finished difference Result 1866 states and 5178 transitions. [2021-03-10 21:24:08,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:24:08,552 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:24:08,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:08,553 INFO L225 Difference]: With dead ends: 1866 [2021-03-10 21:24:08,553 INFO L226 Difference]: Without dead ends: 1866 [2021-03-10 21:24:08,554 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 122.9ms TimeCoverageRelationStatistics Valid=170, Invalid=336, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:08,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1866 states. [2021-03-10 21:24:08,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1866 to 1698. [2021-03-10 21:24:08,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1697 states have (on average 2.897466116676488) internal successors, (4917), 1697 states have internal predecessors, (4917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:08,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 4917 transitions. [2021-03-10 21:24:08,570 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 4917 transitions. Word has length 19 [2021-03-10 21:24:08,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:08,570 INFO L480 AbstractCegarLoop]: Abstraction has 1698 states and 4917 transitions. [2021-03-10 21:24:08,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:08,570 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 4917 transitions. [2021-03-10 21:24:08,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:24:08,571 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:08,571 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:08,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable589,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:08,772 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:08,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:08,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1539416396, now seen corresponding path program 134 times [2021-03-10 21:24:08,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:08,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279817084] [2021-03-10 21:24:08,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:08,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:08,849 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:08,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279817084] [2021-03-10 21:24:08,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43924155] [2021-03-10 21:24:08,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:08,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:24:08,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:08,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:08,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:08,927 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:08,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:08,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2021-03-10 21:24:08,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393146667] [2021-03-10 21:24:08,927 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:24:08,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:08,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:24:08,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:24:08,927 INFO L87 Difference]: Start difference. First operand 1698 states and 4917 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:09,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:09,079 INFO L93 Difference]: Finished difference Result 1913 states and 5283 transitions. [2021-03-10 21:24:09,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:24:09,079 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:24:09,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:09,081 INFO L225 Difference]: With dead ends: 1913 [2021-03-10 21:24:09,081 INFO L226 Difference]: Without dead ends: 1913 [2021-03-10 21:24:09,081 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 159.1ms TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:24:09,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-03-10 21:24:09,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1700. [2021-03-10 21:24:09,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1700 states, 1699 states have (on average 2.896409652736904) internal successors, (4921), 1699 states have internal predecessors, (4921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:09,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1700 states to 1700 states and 4921 transitions. [2021-03-10 21:24:09,098 INFO L78 Accepts]: Start accepts. Automaton has 1700 states and 4921 transitions. Word has length 19 [2021-03-10 21:24:09,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:09,098 INFO L480 AbstractCegarLoop]: Abstraction has 1700 states and 4921 transitions. [2021-03-10 21:24:09,098 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:09,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1700 states and 4921 transitions. [2021-03-10 21:24:09,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:24:09,099 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:09,099 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:09,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable590 [2021-03-10 21:24:09,300 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:09,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:09,300 INFO L82 PathProgramCache]: Analyzing trace with hash -521443406, now seen corresponding path program 135 times [2021-03-10 21:24:09,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:09,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692195921] [2021-03-10 21:24:09,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:09,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:09,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692195921] [2021-03-10 21:24:09,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936636987] [2021-03-10 21:24:09,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:09,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:24:09,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:09,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:09,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:09,436 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:09,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:09,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2021-03-10 21:24:09,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166994329] [2021-03-10 21:24:09,436 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:24:09,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:09,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:24:09,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:24:09,437 INFO L87 Difference]: Start difference. First operand 1700 states and 4921 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:09,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:09,634 INFO L93 Difference]: Finished difference Result 2111 states and 5864 transitions. [2021-03-10 21:24:09,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:24:09,634 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:24:09,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:09,636 INFO L225 Difference]: With dead ends: 2111 [2021-03-10 21:24:09,636 INFO L226 Difference]: Without dead ends: 2111 [2021-03-10 21:24:09,636 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 188.0ms TimeCoverageRelationStatistics Valid=269, Invalid=601, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:24:09,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2111 states. [2021-03-10 21:24:09,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2111 to 1895. [2021-03-10 21:24:09,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1895 states, 1894 states have (on average 2.9123548046462515) internal successors, (5516), 1894 states have internal predecessors, (5516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:09,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1895 states to 1895 states and 5516 transitions. [2021-03-10 21:24:09,659 INFO L78 Accepts]: Start accepts. Automaton has 1895 states and 5516 transitions. Word has length 19 [2021-03-10 21:24:09,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:09,660 INFO L480 AbstractCegarLoop]: Abstraction has 1895 states and 5516 transitions. [2021-03-10 21:24:09,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:09,660 INFO L276 IsEmpty]: Start isEmpty. Operand 1895 states and 5516 transitions. [2021-03-10 21:24:09,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:24:09,661 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:09,661 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:09,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:09,862 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:09,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:09,862 INFO L82 PathProgramCache]: Analyzing trace with hash 16412172, now seen corresponding path program 136 times [2021-03-10 21:24:09,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:09,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998748345] [2021-03-10 21:24:09,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:09,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:09,928 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:09,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998748345] [2021-03-10 21:24:09,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865627245] [2021-03-10 21:24:09,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:09,946 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:24:09,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:09,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:09,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:10,003 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:10,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:10,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2021-03-10 21:24:10,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943205969] [2021-03-10 21:24:10,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:24:10,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:10,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:24:10,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:24:10,004 INFO L87 Difference]: Start difference. First operand 1895 states and 5516 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:10,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:10,200 INFO L93 Difference]: Finished difference Result 2071 states and 5772 transitions. [2021-03-10 21:24:10,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:24:10,201 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:24:10,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:10,203 INFO L225 Difference]: With dead ends: 2071 [2021-03-10 21:24:10,203 INFO L226 Difference]: Without dead ends: 2071 [2021-03-10 21:24:10,203 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 189.3ms TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:24:10,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-03-10 21:24:10,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1876. [2021-03-10 21:24:10,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1876 states, 1875 states have (on average 2.9082666666666666) internal successors, (5453), 1875 states have internal predecessors, (5453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:10,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1876 states to 1876 states and 5453 transitions. [2021-03-10 21:24:10,221 INFO L78 Accepts]: Start accepts. Automaton has 1876 states and 5453 transitions. Word has length 19 [2021-03-10 21:24:10,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:10,221 INFO L480 AbstractCegarLoop]: Abstraction has 1876 states and 5453 transitions. [2021-03-10 21:24:10,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:10,221 INFO L276 IsEmpty]: Start isEmpty. Operand 1876 states and 5453 transitions. [2021-03-10 21:24:10,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:24:10,223 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:10,223 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:10,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:10,423 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:10,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:10,423 INFO L82 PathProgramCache]: Analyzing trace with hash -489934094, now seen corresponding path program 137 times [2021-03-10 21:24:10,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:10,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085970829] [2021-03-10 21:24:10,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:10,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:10,500 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:10,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085970829] [2021-03-10 21:24:10,500 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314366525] [2021-03-10 21:24:10,500 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:10,518 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:24:10,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:10,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:10,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:10,573 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:10,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:10,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 15 [2021-03-10 21:24:10,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177776837] [2021-03-10 21:24:10,573 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:24:10,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:10,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:24:10,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:24:10,573 INFO L87 Difference]: Start difference. First operand 1876 states and 5453 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:10,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:10,749 INFO L93 Difference]: Finished difference Result 2136 states and 6078 transitions. [2021-03-10 21:24:10,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:24:10,750 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:24:10,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:10,752 INFO L225 Difference]: With dead ends: 2136 [2021-03-10 21:24:10,752 INFO L226 Difference]: Without dead ends: 2136 [2021-03-10 21:24:10,752 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 185.6ms TimeCoverageRelationStatistics Valid=241, Invalid=571, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:24:10,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2136 states. [2021-03-10 21:24:10,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2136 to 2034. [2021-03-10 21:24:10,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2034 states, 2033 states have (on average 2.9188391539596656) internal successors, (5934), 2033 states have internal predecessors, (5934), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:10,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2034 states to 2034 states and 5934 transitions. [2021-03-10 21:24:10,772 INFO L78 Accepts]: Start accepts. Automaton has 2034 states and 5934 transitions. Word has length 19 [2021-03-10 21:24:10,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:10,772 INFO L480 AbstractCegarLoop]: Abstraction has 2034 states and 5934 transitions. [2021-03-10 21:24:10,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:10,772 INFO L276 IsEmpty]: Start isEmpty. Operand 2034 states and 5934 transitions. [2021-03-10 21:24:10,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:24:10,773 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:10,773 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:10,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:10,974 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:10,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:10,974 INFO L82 PathProgramCache]: Analyzing trace with hash 993200844, now seen corresponding path program 138 times [2021-03-10 21:24:10,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:10,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437143902] [2021-03-10 21:24:10,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:11,043 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 5 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:11,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437143902] [2021-03-10 21:24:11,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670170606] [2021-03-10 21:24:11,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:11,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:24:11,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:11,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:11,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:11,124 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:11,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:11,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-03-10 21:24:11,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215663206] [2021-03-10 21:24:11,124 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:24:11,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:11,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:24:11,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:24:11,125 INFO L87 Difference]: Start difference. First operand 2034 states and 5934 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:11,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:11,326 INFO L93 Difference]: Finished difference Result 2171 states and 6166 transitions. [2021-03-10 21:24:11,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:24:11,327 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:24:11,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:11,329 INFO L225 Difference]: With dead ends: 2171 [2021-03-10 21:24:11,329 INFO L226 Difference]: Without dead ends: 2171 [2021-03-10 21:24:11,329 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 211.1ms TimeCoverageRelationStatistics Valid=273, Invalid=657, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:24:11,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2171 states. [2021-03-10 21:24:11,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2171 to 2028. [2021-03-10 21:24:11,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2028 states, 2027 states have (on average 2.9181055747409967) internal successors, (5915), 2027 states have internal predecessors, (5915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:11,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2028 states to 2028 states and 5915 transitions. [2021-03-10 21:24:11,348 INFO L78 Accepts]: Start accepts. Automaton has 2028 states and 5915 transitions. Word has length 19 [2021-03-10 21:24:11,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:11,348 INFO L480 AbstractCegarLoop]: Abstraction has 2028 states and 5915 transitions. [2021-03-10 21:24:11,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:11,348 INFO L276 IsEmpty]: Start isEmpty. Operand 2028 states and 5915 transitions. [2021-03-10 21:24:11,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-03-10 21:24:11,349 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:11,350 INFO L519 BasicCegarLoop]: trace histogram [6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:11,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:11,550 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:11,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:11,550 INFO L82 PathProgramCache]: Analyzing trace with hash -274256334, now seen corresponding path program 139 times [2021-03-10 21:24:11,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:11,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581940574] [2021-03-10 21:24:11,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:11,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:11,622 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 7 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:11,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581940574] [2021-03-10 21:24:11,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455466983] [2021-03-10 21:24:11,622 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:11,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:11,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:11,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:11,708 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 10 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:11,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:11,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-03-10 21:24:11,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369656810] [2021-03-10 21:24:11,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:24:11,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:11,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:24:11,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:24:11,709 INFO L87 Difference]: Start difference. First operand 2028 states and 5915 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:12,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:12,004 INFO L93 Difference]: Finished difference Result 2447 states and 6973 transitions. [2021-03-10 21:24:12,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:24:12,005 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-03-10 21:24:12,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:12,007 INFO L225 Difference]: With dead ends: 2447 [2021-03-10 21:24:12,007 INFO L226 Difference]: Without dead ends: 2447 [2021-03-10 21:24:12,007 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 287.0ms TimeCoverageRelationStatistics Valid=495, Invalid=1145, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:24:12,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-03-10 21:24:12,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 2072. [2021-03-10 21:24:12,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 2.920328343795268) internal successors, (6048), 2071 states have internal predecessors, (6048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:12,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 6048 transitions. [2021-03-10 21:24:12,029 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 6048 transitions. Word has length 19 [2021-03-10 21:24:12,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:12,029 INFO L480 AbstractCegarLoop]: Abstraction has 2072 states and 6048 transitions. [2021-03-10 21:24:12,029 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:12,029 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 6048 transitions. [2021-03-10 21:24:12,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:12,031 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:12,031 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:12,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable595,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:12,232 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:12,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:12,232 INFO L82 PathProgramCache]: Analyzing trace with hash 935559555, now seen corresponding path program 140 times [2021-03-10 21:24:12,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:12,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878323495] [2021-03-10 21:24:12,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:12,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:12,281 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:12,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878323495] [2021-03-10 21:24:12,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405506273] [2021-03-10 21:24:12,281 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:12,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:24:12,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:12,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:12,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:24:12,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:12,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-03-10 21:24:12,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247463660] [2021-03-10 21:24:12,330 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:24:12,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:12,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:24:12,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:24:12,330 INFO L87 Difference]: Start difference. First operand 2072 states and 6048 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:12,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:12,471 INFO L93 Difference]: Finished difference Result 2203 states and 6267 transitions. [2021-03-10 21:24:12,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:24:12,472 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:12,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:12,474 INFO L225 Difference]: With dead ends: 2203 [2021-03-10 21:24:12,474 INFO L226 Difference]: Without dead ends: 2199 [2021-03-10 21:24:12,474 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 101.5ms TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:24:12,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-03-10 21:24:12,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 2069. [2021-03-10 21:24:12,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 2068 states have (on average 2.9192456479690523) internal successors, (6037), 2068 states have internal predecessors, (6037), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:12,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 6037 transitions. [2021-03-10 21:24:12,500 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 6037 transitions. Word has length 20 [2021-03-10 21:24:12,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:12,501 INFO L480 AbstractCegarLoop]: Abstraction has 2069 states and 6037 transitions. [2021-03-10 21:24:12,501 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:12,501 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 6037 transitions. [2021-03-10 21:24:12,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:12,503 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:12,503 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:12,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable596 [2021-03-10 21:24:12,719 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:12,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:12,719 INFO L82 PathProgramCache]: Analyzing trace with hash -221292409, now seen corresponding path program 141 times [2021-03-10 21:24:12,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:12,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583809385] [2021-03-10 21:24:12,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:12,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:12,764 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:12,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583809385] [2021-03-10 21:24:12,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012858965] [2021-03-10 21:24:12,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:12,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:24:12,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:12,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:24:12,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:12,838 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:24:12,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:12,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:24:12,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855641136] [2021-03-10 21:24:12,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:24:12,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:12,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:24:12,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:24:12,839 INFO L87 Difference]: Start difference. First operand 2069 states and 6037 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:12,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:12,915 INFO L93 Difference]: Finished difference Result 2256 states and 6332 transitions. [2021-03-10 21:24:12,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:24:12,916 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:12,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:12,918 INFO L225 Difference]: With dead ends: 2256 [2021-03-10 21:24:12,918 INFO L226 Difference]: Without dead ends: 2254 [2021-03-10 21:24:12,918 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:12,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2254 states. [2021-03-10 21:24:12,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2254 to 2079. [2021-03-10 21:24:12,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 2078 states have (on average 2.9181905678537055) internal successors, (6064), 2078 states have internal predecessors, (6064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:12,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 6064 transitions. [2021-03-10 21:24:12,947 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 6064 transitions. Word has length 20 [2021-03-10 21:24:12,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:12,947 INFO L480 AbstractCegarLoop]: Abstraction has 2079 states and 6064 transitions. [2021-03-10 21:24:12,947 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:12,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 6064 transitions. [2021-03-10 21:24:12,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:12,949 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:12,949 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:13,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable597 [2021-03-10 21:24:13,150 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:13,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:13,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1524162281, now seen corresponding path program 142 times [2021-03-10 21:24:13,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:13,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998418960] [2021-03-10 21:24:13,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:13,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:13,190 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:13,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998418960] [2021-03-10 21:24:13,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134050187] [2021-03-10 21:24:13,191 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:13,208 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:24:13,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:13,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:13,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:13,244 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:24:13,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:13,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-03-10 21:24:13,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170185498] [2021-03-10 21:24:13,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:24:13,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:13,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:24:13,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:24:13,245 INFO L87 Difference]: Start difference. First operand 2079 states and 6064 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:13,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:13,339 INFO L93 Difference]: Finished difference Result 2285 states and 6387 transitions. [2021-03-10 21:24:13,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:24:13,339 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:13,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:13,341 INFO L225 Difference]: With dead ends: 2285 [2021-03-10 21:24:13,341 INFO L226 Difference]: Without dead ends: 2284 [2021-03-10 21:24:13,342 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 69.3ms TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:24:13,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2284 states. [2021-03-10 21:24:13,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2284 to 2072. [2021-03-10 21:24:13,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2072 states, 2071 states have (on average 2.91405118300338) internal successors, (6035), 2071 states have internal predecessors, (6035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:13,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2072 states to 2072 states and 6035 transitions. [2021-03-10 21:24:13,362 INFO L78 Accepts]: Start accepts. Automaton has 2072 states and 6035 transitions. Word has length 20 [2021-03-10 21:24:13,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:13,362 INFO L480 AbstractCegarLoop]: Abstraction has 2072 states and 6035 transitions. [2021-03-10 21:24:13,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:13,362 INFO L276 IsEmpty]: Start isEmpty. Operand 2072 states and 6035 transitions. [2021-03-10 21:24:13,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:13,364 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:13,364 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:13,564 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-03-10 21:24:13,564 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:13,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:13,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1060191707, now seen corresponding path program 143 times [2021-03-10 21:24:13,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:13,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176179459] [2021-03-10 21:24:13,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:13,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:13,610 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:13,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176179459] [2021-03-10 21:24:13,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067730956] [2021-03-10 21:24:13,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:13,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:24:13,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:13,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:24:13,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:13,663 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:13,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:13,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:24:13,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014828594] [2021-03-10 21:24:13,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:24:13,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:13,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:24:13,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:24:13,663 INFO L87 Difference]: Start difference. First operand 2072 states and 6035 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:13,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:13,798 INFO L93 Difference]: Finished difference Result 2223 states and 6241 transitions. [2021-03-10 21:24:13,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:24:13,798 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:13,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:13,800 INFO L225 Difference]: With dead ends: 2223 [2021-03-10 21:24:13,800 INFO L226 Difference]: Without dead ends: 2220 [2021-03-10 21:24:13,800 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 94.4ms TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:24:13,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2220 states. [2021-03-10 21:24:13,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2220 to 2065. [2021-03-10 21:24:13,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.9084302325581395) internal successors, (6003), 2064 states have internal predecessors, (6003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:13,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 6003 transitions. [2021-03-10 21:24:13,820 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 6003 transitions. Word has length 20 [2021-03-10 21:24:13,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:13,820 INFO L480 AbstractCegarLoop]: Abstraction has 2065 states and 6003 transitions. [2021-03-10 21:24:13,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:13,820 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 6003 transitions. [2021-03-10 21:24:13,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:13,821 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:13,822 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:14,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable599 [2021-03-10 21:24:14,035 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:14,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:14,035 INFO L82 PathProgramCache]: Analyzing trace with hash 429213289, now seen corresponding path program 144 times [2021-03-10 21:24:14,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:14,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614814386] [2021-03-10 21:24:14,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:14,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:14,088 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:14,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614814386] [2021-03-10 21:24:14,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275454356] [2021-03-10 21:24:14,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:14,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:24:14,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:14,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:24:14,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:14,139 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:14,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:14,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:24:14,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085487000] [2021-03-10 21:24:14,140 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:24:14,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:14,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:24:14,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:24:14,140 INFO L87 Difference]: Start difference. First operand 2065 states and 6003 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:14,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:14,290 INFO L93 Difference]: Finished difference Result 2220 states and 6216 transitions. [2021-03-10 21:24:14,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:24:14,291 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:14,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:14,292 INFO L225 Difference]: With dead ends: 2220 [2021-03-10 21:24:14,292 INFO L226 Difference]: Without dead ends: 2216 [2021-03-10 21:24:14,293 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=169, Invalid=337, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:14,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2216 states. [2021-03-10 21:24:14,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2216 to 2065. [2021-03-10 21:24:14,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.9040697674418605) internal successors, (5994), 2064 states have internal predecessors, (5994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:14,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5994 transitions. [2021-03-10 21:24:14,312 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5994 transitions. Word has length 20 [2021-03-10 21:24:14,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:14,312 INFO L480 AbstractCegarLoop]: Abstraction has 2065 states and 5994 transitions. [2021-03-10 21:24:14,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:14,312 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5994 transitions. [2021-03-10 21:24:14,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:14,314 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:14,314 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:14,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable600,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:14,515 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:14,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:14,515 INFO L82 PathProgramCache]: Analyzing trace with hash -643872091, now seen corresponding path program 145 times [2021-03-10 21:24:14,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:14,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612427935] [2021-03-10 21:24:14,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:14,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:14,580 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:14,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612427935] [2021-03-10 21:24:14,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068136283] [2021-03-10 21:24:14,581 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:14,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:14,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:14,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:14,645 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:14,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:14,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-03-10 21:24:14,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055122171] [2021-03-10 21:24:14,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:24:14,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:14,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:24:14,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:24:14,646 INFO L87 Difference]: Start difference. First operand 2065 states and 5994 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:14,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:14,790 INFO L93 Difference]: Finished difference Result 2259 states and 6407 transitions. [2021-03-10 21:24:14,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:24:14,790 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:14,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:14,793 INFO L225 Difference]: With dead ends: 2259 [2021-03-10 21:24:14,793 INFO L226 Difference]: Without dead ends: 2253 [2021-03-10 21:24:14,793 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:24:14,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2253 states. [2021-03-10 21:24:14,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2253 to 2076. [2021-03-10 21:24:14,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2076 states, 2075 states have (on average 2.9016867469879517) internal successors, (6021), 2075 states have internal predecessors, (6021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:14,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2076 states to 2076 states and 6021 transitions. [2021-03-10 21:24:14,819 INFO L78 Accepts]: Start accepts. Automaton has 2076 states and 6021 transitions. Word has length 20 [2021-03-10 21:24:14,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:14,819 INFO L480 AbstractCegarLoop]: Abstraction has 2076 states and 6021 transitions. [2021-03-10 21:24:14,819 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:14,819 INFO L276 IsEmpty]: Start isEmpty. Operand 2076 states and 6021 transitions. [2021-03-10 21:24:14,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:14,821 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:14,821 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:15,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable601 [2021-03-10 21:24:15,043 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:15,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:15,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1340924973, now seen corresponding path program 146 times [2021-03-10 21:24:15,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:15,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737326416] [2021-03-10 21:24:15,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:15,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:15,096 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:15,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737326416] [2021-03-10 21:24:15,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629769806] [2021-03-10 21:24:15,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:15,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:24:15,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:15,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:15,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:15,183 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:15,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:15,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-03-10 21:24:15,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710744458] [2021-03-10 21:24:15,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:24:15,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:15,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:24:15,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:24:15,183 INFO L87 Difference]: Start difference. First operand 2076 states and 6021 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:15,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:15,317 INFO L93 Difference]: Finished difference Result 2223 states and 6260 transitions. [2021-03-10 21:24:15,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:24:15,317 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:15,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:15,319 INFO L225 Difference]: With dead ends: 2223 [2021-03-10 21:24:15,319 INFO L226 Difference]: Without dead ends: 2214 [2021-03-10 21:24:15,319 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=151, Invalid=311, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:24:15,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-03-10 21:24:15,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 2064. [2021-03-10 21:24:15,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2064 states, 2063 states have (on average 2.9015996122152203) internal successors, (5986), 2063 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:15,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2064 states to 2064 states and 5986 transitions. [2021-03-10 21:24:15,340 INFO L78 Accepts]: Start accepts. Automaton has 2064 states and 5986 transitions. Word has length 20 [2021-03-10 21:24:15,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:15,340 INFO L480 AbstractCegarLoop]: Abstraction has 2064 states and 5986 transitions. [2021-03-10 21:24:15,340 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:15,340 INFO L276 IsEmpty]: Start isEmpty. Operand 2064 states and 5986 transitions. [2021-03-10 21:24:15,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:15,341 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:15,342 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:15,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable602,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:15,542 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:15,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:15,542 INFO L82 PathProgramCache]: Analyzing trace with hash 564789647, now seen corresponding path program 147 times [2021-03-10 21:24:15,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:15,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106368236] [2021-03-10 21:24:15,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:15,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:15,587 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:15,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106368236] [2021-03-10 21:24:15,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881907408] [2021-03-10 21:24:15,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:15,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:24:15,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:15,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:24:15,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:15,668 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:24:15,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:15,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:24:15,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271915337] [2021-03-10 21:24:15,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:24:15,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:15,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:24:15,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:24:15,669 INFO L87 Difference]: Start difference. First operand 2064 states and 5986 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:15,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:15,731 INFO L93 Difference]: Finished difference Result 2236 states and 6252 transitions. [2021-03-10 21:24:15,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:24:15,732 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:15,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:15,734 INFO L225 Difference]: With dead ends: 2236 [2021-03-10 21:24:15,734 INFO L226 Difference]: Without dead ends: 2236 [2021-03-10 21:24:15,734 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:24:15,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2236 states. [2021-03-10 21:24:15,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2236 to 2065. [2021-03-10 21:24:15,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.9001937984496124) internal successors, (5986), 2064 states have internal predecessors, (5986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:15,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5986 transitions. [2021-03-10 21:24:15,755 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5986 transitions. Word has length 20 [2021-03-10 21:24:15,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:15,756 INFO L480 AbstractCegarLoop]: Abstraction has 2065 states and 5986 transitions. [2021-03-10 21:24:15,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:15,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5986 transitions. [2021-03-10 21:24:15,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:15,757 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:15,757 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:15,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable603,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:15,958 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:15,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:15,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1984722959, now seen corresponding path program 148 times [2021-03-10 21:24:15,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:15,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354374197] [2021-03-10 21:24:15,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:15,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:15,997 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:15,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354374197] [2021-03-10 21:24:15,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [436172023] [2021-03-10 21:24:15,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:16,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:24:16,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:16,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:16,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:16,064 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:24:16,065 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:16,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-03-10 21:24:16,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71936197] [2021-03-10 21:24:16,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:24:16,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:16,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:24:16,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:24:16,065 INFO L87 Difference]: Start difference. First operand 2065 states and 5986 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:16,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:16,138 INFO L93 Difference]: Finished difference Result 2263 states and 6281 transitions. [2021-03-10 21:24:16,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:24:16,139 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:16,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:16,141 INFO L225 Difference]: With dead ends: 2263 [2021-03-10 21:24:16,141 INFO L226 Difference]: Without dead ends: 2262 [2021-03-10 21:24:16,141 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 57.0ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:24:16,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2262 states. [2021-03-10 21:24:16,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2262 to 2069. [2021-03-10 21:24:16,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2069 states, 2068 states have (on average 2.897001934235977) internal successors, (5991), 2068 states have internal predecessors, (5991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:16,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2069 states to 2069 states and 5991 transitions. [2021-03-10 21:24:16,163 INFO L78 Accepts]: Start accepts. Automaton has 2069 states and 5991 transitions. Word has length 20 [2021-03-10 21:24:16,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:16,163 INFO L480 AbstractCegarLoop]: Abstraction has 2069 states and 5991 transitions. [2021-03-10 21:24:16,163 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:16,163 INFO L276 IsEmpty]: Start isEmpty. Operand 2069 states and 5991 transitions. [2021-03-10 21:24:16,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:16,165 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:16,165 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:16,371 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable604 [2021-03-10 21:24:16,371 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:16,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:16,371 INFO L82 PathProgramCache]: Analyzing trace with hash -274109651, now seen corresponding path program 149 times [2021-03-10 21:24:16,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:16,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680945360] [2021-03-10 21:24:16,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:16,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:16,427 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:16,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680945360] [2021-03-10 21:24:16,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012066515] [2021-03-10 21:24:16,427 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:16,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:24:16,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:16,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:16,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:16,476 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:16,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:16,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 11 [2021-03-10 21:24:16,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542680006] [2021-03-10 21:24:16,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:24:16,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:16,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:24:16,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:24:16,477 INFO L87 Difference]: Start difference. First operand 2069 states and 5991 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:16,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:16,592 INFO L93 Difference]: Finished difference Result 2229 states and 6208 transitions. [2021-03-10 21:24:16,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:24:16,593 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:16,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:16,595 INFO L225 Difference]: With dead ends: 2229 [2021-03-10 21:24:16,595 INFO L226 Difference]: Without dead ends: 2225 [2021-03-10 21:24:16,595 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:24:16,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-03-10 21:24:16,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2054. [2021-03-10 21:24:16,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 2053 states have (on average 2.8913784705309302) internal successors, (5936), 2053 states have internal predecessors, (5936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:16,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 5936 transitions. [2021-03-10 21:24:16,617 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 5936 transitions. Word has length 20 [2021-03-10 21:24:16,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:16,617 INFO L480 AbstractCegarLoop]: Abstraction has 2054 states and 5936 transitions. [2021-03-10 21:24:16,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:16,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 5936 transitions. [2021-03-10 21:24:16,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:16,619 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:16,619 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:16,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable605,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:16,819 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:16,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:16,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1215295345, now seen corresponding path program 150 times [2021-03-10 21:24:16,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:16,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037028419] [2021-03-10 21:24:16,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:16,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:16,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037028419] [2021-03-10 21:24:16,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191196428] [2021-03-10 21:24:16,865 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:16,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:24:16,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:16,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:24:16,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:16,921 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:16,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:16,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-03-10 21:24:16,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989457074] [2021-03-10 21:24:16,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:24:16,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:16,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:24:16,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:24:16,922 INFO L87 Difference]: Start difference. First operand 2054 states and 5936 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:17,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:17,056 INFO L93 Difference]: Finished difference Result 2217 states and 6160 transitions. [2021-03-10 21:24:17,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:24:17,056 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:17,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:17,058 INFO L225 Difference]: With dead ends: 2217 [2021-03-10 21:24:17,058 INFO L226 Difference]: Without dead ends: 2211 [2021-03-10 21:24:17,059 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=155, Invalid=307, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:24:17,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2211 states. [2021-03-10 21:24:17,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2211 to 2046. [2021-03-10 21:24:17,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2046 states, 2045 states have (on average 2.8880195599022005) internal successors, (5906), 2045 states have internal predecessors, (5906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:17,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2046 states to 2046 states and 5906 transitions. [2021-03-10 21:24:17,078 INFO L78 Accepts]: Start accepts. Automaton has 2046 states and 5906 transitions. Word has length 20 [2021-03-10 21:24:17,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:17,078 INFO L480 AbstractCegarLoop]: Abstraction has 2046 states and 5906 transitions. [2021-03-10 21:24:17,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:17,078 INFO L276 IsEmpty]: Start isEmpty. Operand 2046 states and 5906 transitions. [2021-03-10 21:24:17,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:17,080 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:17,080 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:17,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable606 [2021-03-10 21:24:17,281 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:17,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:17,281 INFO L82 PathProgramCache]: Analyzing trace with hash 142209965, now seen corresponding path program 151 times [2021-03-10 21:24:17,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:17,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66727355] [2021-03-10 21:24:17,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:17,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:17,333 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:17,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66727355] [2021-03-10 21:24:17,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035278379] [2021-03-10 21:24:17,333 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:17,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:17,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:17,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:17,386 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:17,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:17,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-03-10 21:24:17,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293243990] [2021-03-10 21:24:17,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:24:17,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:17,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:24:17,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:17,387 INFO L87 Difference]: Start difference. First operand 2046 states and 5906 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:17,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:17,534 INFO L93 Difference]: Finished difference Result 2213 states and 6136 transitions. [2021-03-10 21:24:17,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:24:17,535 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:17,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:17,536 INFO L225 Difference]: With dead ends: 2213 [2021-03-10 21:24:17,536 INFO L226 Difference]: Without dead ends: 2207 [2021-03-10 21:24:17,536 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 112.8ms TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:17,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2207 states. [2021-03-10 21:24:17,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2207 to 2047. [2021-03-10 21:24:17,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2047 states, 2046 states have (on average 2.8836754643206257) internal successors, (5900), 2046 states have internal predecessors, (5900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:17,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2047 states to 2047 states and 5900 transitions. [2021-03-10 21:24:17,555 INFO L78 Accepts]: Start accepts. Automaton has 2047 states and 5900 transitions. Word has length 20 [2021-03-10 21:24:17,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:17,555 INFO L480 AbstractCegarLoop]: Abstraction has 2047 states and 5900 transitions. [2021-03-10 21:24:17,556 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:17,556 INFO L276 IsEmpty]: Start isEmpty. Operand 2047 states and 5900 transitions. [2021-03-10 21:24:17,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:17,557 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:17,557 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:17,757 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:17,758 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:17,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:17,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1236301553, now seen corresponding path program 152 times [2021-03-10 21:24:17,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:17,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669637284] [2021-03-10 21:24:17,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:17,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:17,815 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:17,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669637284] [2021-03-10 21:24:17,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296916173] [2021-03-10 21:24:17,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:17,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:24:17,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:17,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:17,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:17,869 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:17,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:17,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-03-10 21:24:17,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390969494] [2021-03-10 21:24:17,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:24:17,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:17,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:24:17,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:17,870 INFO L87 Difference]: Start difference. First operand 2047 states and 5900 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:18,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:18,025 INFO L93 Difference]: Finished difference Result 2421 states and 6711 transitions. [2021-03-10 21:24:18,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:24:18,025 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:18,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:18,027 INFO L225 Difference]: With dead ends: 2421 [2021-03-10 21:24:18,027 INFO L226 Difference]: Without dead ends: 2413 [2021-03-10 21:24:18,027 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 127.1ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:24:18,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2413 states. [2021-03-10 21:24:18,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2413 to 2084. [2021-03-10 21:24:18,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 2083 states have (on average 2.884301488238118) internal successors, (6008), 2083 states have internal predecessors, (6008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:18,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 6008 transitions. [2021-03-10 21:24:18,048 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 6008 transitions. Word has length 20 [2021-03-10 21:24:18,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:18,048 INFO L480 AbstractCegarLoop]: Abstraction has 2084 states and 6008 transitions. [2021-03-10 21:24:18,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:18,048 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 6008 transitions. [2021-03-10 21:24:18,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:18,050 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:18,050 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:18,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable608,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:18,250 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:18,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:18,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1102498691, now seen corresponding path program 153 times [2021-03-10 21:24:18,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:18,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418448970] [2021-03-10 21:24:18,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:18,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:18,315 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:18,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418448970] [2021-03-10 21:24:18,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243767255] [2021-03-10 21:24:18,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:18,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:24:18,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:18,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:24:18,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:18,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:18,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:24:18,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724475066] [2021-03-10 21:24:18,372 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:24:18,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:18,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:24:18,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:18,372 INFO L87 Difference]: Start difference. First operand 2084 states and 6008 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:18,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:18,506 INFO L93 Difference]: Finished difference Result 2248 states and 6298 transitions. [2021-03-10 21:24:18,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:24:18,507 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:18,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:18,509 INFO L225 Difference]: With dead ends: 2248 [2021-03-10 21:24:18,509 INFO L226 Difference]: Without dead ends: 2240 [2021-03-10 21:24:18,509 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 113.9ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:18,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2240 states. [2021-03-10 21:24:18,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2240 to 2079. [2021-03-10 21:24:18,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2079 states, 2078 states have (on average 2.8816169393647737) internal successors, (5988), 2078 states have internal predecessors, (5988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:18,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2079 states to 2079 states and 5988 transitions. [2021-03-10 21:24:18,528 INFO L78 Accepts]: Start accepts. Automaton has 2079 states and 5988 transitions. Word has length 20 [2021-03-10 21:24:18,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:18,528 INFO L480 AbstractCegarLoop]: Abstraction has 2079 states and 5988 transitions. [2021-03-10 21:24:18,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:18,528 INFO L276 IsEmpty]: Start isEmpty. Operand 2079 states and 5988 transitions. [2021-03-10 21:24:18,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:18,530 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:18,530 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:18,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:18,731 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:18,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:18,731 INFO L82 PathProgramCache]: Analyzing trace with hash -836470393, now seen corresponding path program 154 times [2021-03-10 21:24:18,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:18,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890139697] [2021-03-10 21:24:18,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:18,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:18,783 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:18,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890139697] [2021-03-10 21:24:18,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528068514] [2021-03-10 21:24:18,783 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:18,801 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:24:18,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:18,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:24:18,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:18,837 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:24:18,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:18,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-03-10 21:24:18,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056763843] [2021-03-10 21:24:18,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:24:18,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:18,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:24:18,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:24:18,838 INFO L87 Difference]: Start difference. First operand 2079 states and 5988 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:18,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:18,887 INFO L93 Difference]: Finished difference Result 2261 states and 6260 transitions. [2021-03-10 21:24:18,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:24:18,887 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:18,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:18,889 INFO L225 Difference]: With dead ends: 2261 [2021-03-10 21:24:18,889 INFO L226 Difference]: Without dead ends: 2259 [2021-03-10 21:24:18,889 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:24:18,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2259 states. [2021-03-10 21:24:18,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2259 to 2075. [2021-03-10 21:24:18,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2075 states, 2074 states have (on average 2.880424300867888) internal successors, (5974), 2074 states have internal predecessors, (5974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:18,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2075 states to 2075 states and 5974 transitions. [2021-03-10 21:24:18,911 INFO L78 Accepts]: Start accepts. Automaton has 2075 states and 5974 transitions. Word has length 20 [2021-03-10 21:24:18,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:18,911 INFO L480 AbstractCegarLoop]: Abstraction has 2075 states and 5974 transitions. [2021-03-10 21:24:18,911 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:18,911 INFO L276 IsEmpty]: Start isEmpty. Operand 2075 states and 5974 transitions. [2021-03-10 21:24:18,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:18,912 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:18,912 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:19,113 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable610,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:19,113 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:19,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:19,113 INFO L82 PathProgramCache]: Analyzing trace with hash 908984297, now seen corresponding path program 155 times [2021-03-10 21:24:19,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:19,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505796842] [2021-03-10 21:24:19,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:19,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:19,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505796842] [2021-03-10 21:24:19,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121329094] [2021-03-10 21:24:19,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:19,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:24:19,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:19,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:19,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:19,218 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 25 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:24:19,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:19,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-03-10 21:24:19,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242364619] [2021-03-10 21:24:19,219 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:24:19,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:19,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:24:19,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:24:19,219 INFO L87 Difference]: Start difference. First operand 2075 states and 5974 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:19,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:19,276 INFO L93 Difference]: Finished difference Result 2242 states and 6197 transitions. [2021-03-10 21:24:19,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:24:19,277 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:19,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:19,279 INFO L225 Difference]: With dead ends: 2242 [2021-03-10 21:24:19,279 INFO L226 Difference]: Without dead ends: 2242 [2021-03-10 21:24:19,279 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 56.3ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:19,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2242 states. [2021-03-10 21:24:19,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2242 to 2065. [2021-03-10 21:24:19,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.874515503875969) internal successors, (5933), 2064 states have internal predecessors, (5933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:19,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5933 transitions. [2021-03-10 21:24:19,299 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5933 transitions. Word has length 20 [2021-03-10 21:24:19,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:19,299 INFO L480 AbstractCegarLoop]: Abstraction has 2065 states and 5933 transitions. [2021-03-10 21:24:19,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 11 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:19,299 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5933 transitions. [2021-03-10 21:24:19,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:19,300 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:19,300 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:19,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-03-10 21:24:19,501 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:19,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:19,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1675369691, now seen corresponding path program 156 times [2021-03-10 21:24:19,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:19,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355948086] [2021-03-10 21:24:19,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:19,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:19,551 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:19,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355948086] [2021-03-10 21:24:19,551 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885056466] [2021-03-10 21:24:19,551 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:19,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:24:19,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:19,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:24:19,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:19,616 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:19,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:19,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:24:19,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198474359] [2021-03-10 21:24:19,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:24:19,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:19,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:24:19,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:24:19,617 INFO L87 Difference]: Start difference. First operand 2065 states and 5933 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:19,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:19,732 INFO L93 Difference]: Finished difference Result 2234 states and 6164 transitions. [2021-03-10 21:24:19,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:24:19,732 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:19,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:19,734 INFO L225 Difference]: With dead ends: 2234 [2021-03-10 21:24:19,734 INFO L226 Difference]: Without dead ends: 2231 [2021-03-10 21:24:19,735 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 82.2ms TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:24:19,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2021-03-10 21:24:19,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2055. [2021-03-10 21:24:19,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 2.8690360272638755) internal successors, (5893), 2054 states have internal predecessors, (5893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:19,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5893 transitions. [2021-03-10 21:24:19,754 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5893 transitions. Word has length 20 [2021-03-10 21:24:19,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:19,754 INFO L480 AbstractCegarLoop]: Abstraction has 2055 states and 5893 transitions. [2021-03-10 21:24:19,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:19,754 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5893 transitions. [2021-03-10 21:24:19,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:19,756 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:19,756 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:19,956 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable612 [2021-03-10 21:24:19,957 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:19,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:19,957 INFO L82 PathProgramCache]: Analyzing trace with hash -185964695, now seen corresponding path program 157 times [2021-03-10 21:24:19,957 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:19,957 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524898067] [2021-03-10 21:24:19,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:19,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:20,012 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:20,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524898067] [2021-03-10 21:24:20,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406246485] [2021-03-10 21:24:20,012 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:20,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:20,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:20,071 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:20,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:20,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-03-10 21:24:20,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967086650] [2021-03-10 21:24:20,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:24:20,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:20,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:24:20,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:24:20,072 INFO L87 Difference]: Start difference. First operand 2055 states and 5893 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:20,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:20,189 INFO L93 Difference]: Finished difference Result 2228 states and 6131 transitions. [2021-03-10 21:24:20,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:24:20,189 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:20,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:20,191 INFO L225 Difference]: With dead ends: 2228 [2021-03-10 21:24:20,191 INFO L226 Difference]: Without dead ends: 2224 [2021-03-10 21:24:20,191 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 95.6ms TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:24:20,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2224 states. [2021-03-10 21:24:20,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2224 to 2055. [2021-03-10 21:24:20,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 2.862706913339825) internal successors, (5880), 2054 states have internal predecessors, (5880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:20,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5880 transitions. [2021-03-10 21:24:20,212 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5880 transitions. Word has length 20 [2021-03-10 21:24:20,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:20,212 INFO L480 AbstractCegarLoop]: Abstraction has 2055 states and 5880 transitions. [2021-03-10 21:24:20,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:20,212 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5880 transitions. [2021-03-10 21:24:20,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:20,213 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:20,214 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:20,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable613 [2021-03-10 21:24:20,414 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:20,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:20,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1259050075, now seen corresponding path program 158 times [2021-03-10 21:24:20,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:20,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495205705] [2021-03-10 21:24:20,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:20,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:20,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495205705] [2021-03-10 21:24:20,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684416727] [2021-03-10 21:24:20,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:20,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:24:20,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:20,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:20,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:20,518 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:24:20,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:20,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 12 [2021-03-10 21:24:20,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653283034] [2021-03-10 21:24:20,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:24:20,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:20,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:24:20,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:24:20,519 INFO L87 Difference]: Start difference. First operand 2055 states and 5880 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:20,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:20,635 INFO L93 Difference]: Finished difference Result 2691 states and 7378 transitions. [2021-03-10 21:24:20,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:24:20,636 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:20,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:20,638 INFO L225 Difference]: With dead ends: 2691 [2021-03-10 21:24:20,639 INFO L226 Difference]: Without dead ends: 2685 [2021-03-10 21:24:20,639 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=136, Invalid=284, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:24:20,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2685 states. [2021-03-10 21:24:20,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2685 to 2055. [2021-03-10 21:24:20,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 2.8612463485881205) internal successors, (5877), 2054 states have internal predecessors, (5877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:20,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5877 transitions. [2021-03-10 21:24:20,659 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5877 transitions. Word has length 20 [2021-03-10 21:24:20,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:20,659 INFO L480 AbstractCegarLoop]: Abstraction has 2055 states and 5877 transitions. [2021-03-10 21:24:20,659 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:20,659 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5877 transitions. [2021-03-10 21:24:20,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:20,660 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:20,661 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:20,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable614,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:20,861 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:20,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:20,861 INFO L82 PathProgramCache]: Analyzing trace with hash -164958487, now seen corresponding path program 159 times [2021-03-10 21:24:20,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:20,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139014210] [2021-03-10 21:24:20,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:20,925 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:20,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139014210] [2021-03-10 21:24:20,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169846028] [2021-03-10 21:24:20,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:20,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:24:20,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:20,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:24:20,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:20,975 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:20,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:20,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:24:20,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370603395] [2021-03-10 21:24:20,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:24:20,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:20,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:24:20,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:20,976 INFO L87 Difference]: Start difference. First operand 2055 states and 5877 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:21,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:21,116 INFO L93 Difference]: Finished difference Result 2703 states and 7388 transitions. [2021-03-10 21:24:21,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:24:21,116 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:21,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:21,119 INFO L225 Difference]: With dead ends: 2703 [2021-03-10 21:24:21,119 INFO L226 Difference]: Without dead ends: 2695 [2021-03-10 21:24:21,119 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 112.9ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:21,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2695 states. [2021-03-10 21:24:21,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2695 to 2065. [2021-03-10 21:24:21,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.862403100775194) internal successors, (5908), 2064 states have internal predecessors, (5908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:21,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5908 transitions. [2021-03-10 21:24:21,150 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5908 transitions. Word has length 20 [2021-03-10 21:24:21,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:21,150 INFO L480 AbstractCegarLoop]: Abstraction has 2065 states and 5908 transitions. [2021-03-10 21:24:21,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:21,150 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5908 transitions. [2021-03-10 21:24:21,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:21,152 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:21,152 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:21,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable615 [2021-03-10 21:24:21,352 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:21,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:21,353 INFO L82 PathProgramCache]: Analyzing trace with hash -607857627, now seen corresponding path program 160 times [2021-03-10 21:24:21,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:21,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907960196] [2021-03-10 21:24:21,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:21,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:21,424 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:21,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907960196] [2021-03-10 21:24:21,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564157739] [2021-03-10 21:24:21,425 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:21,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:24:21,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:21,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:21,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:21,474 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:21,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:21,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-03-10 21:24:21,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583547410] [2021-03-10 21:24:21,474 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:24:21,474 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:21,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:24:21,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:21,475 INFO L87 Difference]: Start difference. First operand 2065 states and 5908 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:21,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:21,628 INFO L93 Difference]: Finished difference Result 2452 states and 6775 transitions. [2021-03-10 21:24:21,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:24:21,628 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:21,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:21,631 INFO L225 Difference]: With dead ends: 2452 [2021-03-10 21:24:21,631 INFO L226 Difference]: Without dead ends: 2442 [2021-03-10 21:24:21,631 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:24:21,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2442 states. [2021-03-10 21:24:21,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2442 to 2065. [2021-03-10 21:24:21,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2065 states, 2064 states have (on average 2.8614341085271318) internal successors, (5906), 2064 states have internal predecessors, (5906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:21,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2065 states to 2065 states and 5906 transitions. [2021-03-10 21:24:21,650 INFO L78 Accepts]: Start accepts. Automaton has 2065 states and 5906 transitions. Word has length 20 [2021-03-10 21:24:21,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:21,650 INFO L480 AbstractCegarLoop]: Abstraction has 2065 states and 5906 transitions. [2021-03-10 21:24:21,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:21,650 INFO L276 IsEmpty]: Start isEmpty. Operand 2065 states and 5906 transitions. [2021-03-10 21:24:21,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:21,652 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:21,652 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:21,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable616,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:21,853 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:21,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:21,853 INFO L82 PathProgramCache]: Analyzing trace with hash 130741455, now seen corresponding path program 161 times [2021-03-10 21:24:21,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:21,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052848854] [2021-03-10 21:24:21,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:21,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:21,910 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:21,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052848854] [2021-03-10 21:24:21,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032764620] [2021-03-10 21:24:21,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:21,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:24:21,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:21,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:21,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:21,994 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:24:21,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:21,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 15 [2021-03-10 21:24:21,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440272071] [2021-03-10 21:24:21,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:24:21,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:21,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:24:21,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:24:21,995 INFO L87 Difference]: Start difference. First operand 2065 states and 5906 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:22,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:22,112 INFO L93 Difference]: Finished difference Result 2203 states and 6075 transitions. [2021-03-10 21:24:22,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:24:22,112 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:22,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:22,114 INFO L225 Difference]: With dead ends: 2203 [2021-03-10 21:24:22,114 INFO L226 Difference]: Without dead ends: 2199 [2021-03-10 21:24:22,115 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 124.0ms TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:22,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-03-10 21:24:22,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 2018. [2021-03-10 21:24:22,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2017 states have (on average 2.8507684680218146) internal successors, (5750), 2017 states have internal predecessors, (5750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:22,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 5750 transitions. [2021-03-10 21:24:22,134 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 5750 transitions. Word has length 20 [2021-03-10 21:24:22,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:22,134 INFO L480 AbstractCegarLoop]: Abstraction has 2018 states and 5750 transitions. [2021-03-10 21:24:22,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:22,134 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 5750 transitions. [2021-03-10 21:24:22,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:22,136 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:22,136 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:22,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable617,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:22,339 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:22,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:22,339 INFO L82 PathProgramCache]: Analyzing trace with hash 1438631789, now seen corresponding path program 162 times [2021-03-10 21:24:22,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:22,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481080668] [2021-03-10 21:24:22,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:22,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:22,395 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:22,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481080668] [2021-03-10 21:24:22,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834214061] [2021-03-10 21:24:22,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:22,424 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:24:22,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:22,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:24:22,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:22,456 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:22,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:22,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:24:22,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133326118] [2021-03-10 21:24:22,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:24:22,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:22,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:24:22,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:24:22,457 INFO L87 Difference]: Start difference. First operand 2018 states and 5750 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:22,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:22,571 INFO L93 Difference]: Finished difference Result 2240 states and 6144 transitions. [2021-03-10 21:24:22,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:24:22,571 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:22,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:22,573 INFO L225 Difference]: With dead ends: 2240 [2021-03-10 21:24:22,573 INFO L226 Difference]: Without dead ends: 2231 [2021-03-10 21:24:22,574 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 95.9ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:24:22,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2021-03-10 21:24:22,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2011. [2021-03-10 21:24:22,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2011 states, 2010 states have (on average 2.846268656716418) internal successors, (5721), 2010 states have internal predecessors, (5721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:22,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2011 states to 2011 states and 5721 transitions. [2021-03-10 21:24:22,593 INFO L78 Accepts]: Start accepts. Automaton has 2011 states and 5721 transitions. Word has length 20 [2021-03-10 21:24:22,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:22,593 INFO L480 AbstractCegarLoop]: Abstraction has 2011 states and 5721 transitions. [2021-03-10 21:24:22,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 12 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:22,593 INFO L276 IsEmpty]: Start isEmpty. Operand 2011 states and 5721 transitions. [2021-03-10 21:24:22,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:22,595 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:22,595 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:22,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,164 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:22,795 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:22,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:22,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1762243919, now seen corresponding path program 163 times [2021-03-10 21:24:22,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:22,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822155615] [2021-03-10 21:24:22,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:22,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:22,858 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:22,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822155615] [2021-03-10 21:24:22,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984100210] [2021-03-10 21:24:22,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:22,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:22,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:22,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:22,907 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:22,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:22,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-03-10 21:24:22,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370908969] [2021-03-10 21:24:22,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:24:22,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:22,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:24:22,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:22,907 INFO L87 Difference]: Start difference. First operand 2011 states and 5721 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:23,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:23,065 INFO L93 Difference]: Finished difference Result 2239 states and 6126 transitions. [2021-03-10 21:24:23,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:24:23,066 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:23,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:23,069 INFO L225 Difference]: With dead ends: 2239 [2021-03-10 21:24:23,069 INFO L226 Difference]: Without dead ends: 2231 [2021-03-10 21:24:23,069 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 128.9ms TimeCoverageRelationStatistics Valid=163, Invalid=343, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:23,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2231 states. [2021-03-10 21:24:23,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2231 to 2024. [2021-03-10 21:24:23,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2024 states, 2023 states have (on average 2.842313395946614) internal successors, (5750), 2023 states have internal predecessors, (5750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:23,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2024 states to 2024 states and 5750 transitions. [2021-03-10 21:24:23,096 INFO L78 Accepts]: Start accepts. Automaton has 2024 states and 5750 transitions. Word has length 20 [2021-03-10 21:24:23,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:23,096 INFO L480 AbstractCegarLoop]: Abstraction has 2024 states and 5750 transitions. [2021-03-10 21:24:23,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:23,096 INFO L276 IsEmpty]: Start isEmpty. Operand 2024 states and 5750 transitions. [2021-03-10 21:24:23,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:23,098 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:23,098 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:23,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable619,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:23,303 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:23,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:23,303 INFO L82 PathProgramCache]: Analyzing trace with hash 2089824237, now seen corresponding path program 164 times [2021-03-10 21:24:23,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:23,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728922449] [2021-03-10 21:24:23,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:23,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:23,370 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:23,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728922449] [2021-03-10 21:24:23,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860363603] [2021-03-10 21:24:23,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:23,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:24:23,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:23,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:23,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:23,434 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:23,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:23,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-03-10 21:24:23,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353455025] [2021-03-10 21:24:23,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:24:23,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:23,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:24:23,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:23,435 INFO L87 Difference]: Start difference. First operand 2024 states and 5750 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:23,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:23,578 INFO L93 Difference]: Finished difference Result 2477 states and 6771 transitions. [2021-03-10 21:24:23,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:24:23,579 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:23,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:23,581 INFO L225 Difference]: With dead ends: 2477 [2021-03-10 21:24:23,581 INFO L226 Difference]: Without dead ends: 2467 [2021-03-10 21:24:23,582 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 133.9ms TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:24:23,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2467 states. [2021-03-10 21:24:23,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2467 to 2031. [2021-03-10 21:24:23,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2031 states, 2030 states have (on average 2.840394088669951) internal successors, (5766), 2030 states have internal predecessors, (5766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:23,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2031 states to 2031 states and 5766 transitions. [2021-03-10 21:24:23,610 INFO L78 Accepts]: Start accepts. Automaton has 2031 states and 5766 transitions. Word has length 20 [2021-03-10 21:24:23,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:23,610 INFO L480 AbstractCegarLoop]: Abstraction has 2031 states and 5766 transitions. [2021-03-10 21:24:23,610 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:23,610 INFO L276 IsEmpty]: Start isEmpty. Operand 2031 states and 5766 transitions. [2021-03-10 21:24:23,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:23,612 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:23,612 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:23,812 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable620 [2021-03-10 21:24:23,812 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:23,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:23,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1135579185, now seen corresponding path program 165 times [2021-03-10 21:24:23,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:23,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440247459] [2021-03-10 21:24:23,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:23,857 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:23,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440247459] [2021-03-10 21:24:23,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220268890] [2021-03-10 21:24:23,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:23,876 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:24:23,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:23,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:24:23,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:23,913 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:23,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:23,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:24:23,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056017119] [2021-03-10 21:24:23,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:24:23,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:23,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:24:23,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:24:23,913 INFO L87 Difference]: Start difference. First operand 2031 states and 5766 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:23,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:23,992 INFO L93 Difference]: Finished difference Result 2228 states and 6076 transitions. [2021-03-10 21:24:23,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:24:23,992 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:23,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:23,994 INFO L225 Difference]: With dead ends: 2228 [2021-03-10 21:24:23,994 INFO L226 Difference]: Without dead ends: 2228 [2021-03-10 21:24:23,994 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 61.1ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:24:23,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2228 states. [2021-03-10 21:24:24,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2228 to 2015. [2021-03-10 21:24:24,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2015 states, 2014 states have (on average 2.837140019860973) internal successors, (5714), 2014 states have internal predecessors, (5714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:24,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2015 states to 2015 states and 5714 transitions. [2021-03-10 21:24:24,014 INFO L78 Accepts]: Start accepts. Automaton has 2015 states and 5714 transitions. Word has length 20 [2021-03-10 21:24:24,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:24,014 INFO L480 AbstractCegarLoop]: Abstraction has 2015 states and 5714 transitions. [2021-03-10 21:24:24,014 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 11 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:24,014 INFO L276 IsEmpty]: Start isEmpty. Operand 2015 states and 5714 transitions. [2021-03-10 21:24:24,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:24,015 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:24,016 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:24,216 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable621 [2021-03-10 21:24:24,216 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:24,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:24,216 INFO L82 PathProgramCache]: Analyzing trace with hash -460779053, now seen corresponding path program 166 times [2021-03-10 21:24:24,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:24,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624136383] [2021-03-10 21:24:24,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:24,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:24,299 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:24,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624136383] [2021-03-10 21:24:24,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533004716] [2021-03-10 21:24:24,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:24,316 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:24:24,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:24,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:24,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:24,353 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:24,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:24,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-03-10 21:24:24,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144446025] [2021-03-10 21:24:24,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:24:24,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:24,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:24:24,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:24:24,355 INFO L87 Difference]: Start difference. First operand 2015 states and 5714 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:24,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:24,515 INFO L93 Difference]: Finished difference Result 2228 states and 6116 transitions. [2021-03-10 21:24:24,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:24:24,516 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:24,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:24,518 INFO L225 Difference]: With dead ends: 2228 [2021-03-10 21:24:24,518 INFO L226 Difference]: Without dead ends: 2218 [2021-03-10 21:24:24,518 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 137.1ms TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:24:24,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2218 states. [2021-03-10 21:24:24,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2218 to 2010. [2021-03-10 21:24:24,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2010 states, 2009 states have (on average 2.8322548531607765) internal successors, (5690), 2009 states have internal predecessors, (5690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:24,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2010 states to 2010 states and 5690 transitions. [2021-03-10 21:24:24,537 INFO L78 Accepts]: Start accepts. Automaton has 2010 states and 5690 transitions. Word has length 20 [2021-03-10 21:24:24,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:24,537 INFO L480 AbstractCegarLoop]: Abstraction has 2010 states and 5690 transitions. [2021-03-10 21:24:24,537 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:24,537 INFO L276 IsEmpty]: Start isEmpty. Operand 2010 states and 5690 transitions. [2021-03-10 21:24:24,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:24,539 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:24,539 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:24,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable622,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:24,739 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:24,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:24,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1325858673, now seen corresponding path program 167 times [2021-03-10 21:24:24,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:24,739 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034361344] [2021-03-10 21:24:24,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:24,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:24,780 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:24,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034361344] [2021-03-10 21:24:24,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204296423] [2021-03-10 21:24:24,780 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:24,798 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:24:24,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:24,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:24,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:24,834 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:24:24,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:24,835 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 11 [2021-03-10 21:24:24,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427229] [2021-03-10 21:24:24,835 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:24:24,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:24,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:24:24,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:24:24,835 INFO L87 Difference]: Start difference. First operand 2010 states and 5690 transitions. Second operand has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:24,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:24,904 INFO L93 Difference]: Finished difference Result 2251 states and 6063 transitions. [2021-03-10 21:24:24,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:24:24,904 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:24,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:24,906 INFO L225 Difference]: With dead ends: 2251 [2021-03-10 21:24:24,906 INFO L226 Difference]: Without dead ends: 2251 [2021-03-10 21:24:24,906 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 46.7ms TimeCoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:24,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2251 states. [2021-03-10 21:24:24,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2251 to 2017. [2021-03-10 21:24:24,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.8348214285714284) internal successors, (5715), 2016 states have internal predecessors, (5715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:24,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 5715 transitions. [2021-03-10 21:24:24,925 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 5715 transitions. Word has length 20 [2021-03-10 21:24:24,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:24,925 INFO L480 AbstractCegarLoop]: Abstraction has 2017 states and 5715 transitions. [2021-03-10 21:24:24,925 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 11 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:24,925 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 5715 transitions. [2021-03-10 21:24:24,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:24,927 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:24,927 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:25,127 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable623 [2021-03-10 21:24:25,127 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:25,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:25,127 INFO L82 PathProgramCache]: Analyzing trace with hash 2130209325, now seen corresponding path program 168 times [2021-03-10 21:24:25,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:25,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686766949] [2021-03-10 21:24:25,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:25,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:25,178 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:25,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686766949] [2021-03-10 21:24:25,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911599721] [2021-03-10 21:24:25,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:25,198 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:24:25,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:25,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:24:25,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:25,230 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:25,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:25,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:24:25,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689854704] [2021-03-10 21:24:25,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:24:25,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:25,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:24:25,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:24:25,231 INFO L87 Difference]: Start difference. First operand 2017 states and 5715 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:25,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:25,338 INFO L93 Difference]: Finished difference Result 2206 states and 5970 transitions. [2021-03-10 21:24:25,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:24:25,338 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:25,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:25,340 INFO L225 Difference]: With dead ends: 2206 [2021-03-10 21:24:25,341 INFO L226 Difference]: Without dead ends: 2204 [2021-03-10 21:24:25,341 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 85.8ms TimeCoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:24:25,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2204 states. [2021-03-10 21:24:25,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2204 to 2017. [2021-03-10 21:24:25,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.831845238095238) internal successors, (5709), 2016 states have internal predecessors, (5709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:25,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 5709 transitions. [2021-03-10 21:24:25,360 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 5709 transitions. Word has length 20 [2021-03-10 21:24:25,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:25,360 INFO L480 AbstractCegarLoop]: Abstraction has 2017 states and 5709 transitions. [2021-03-10 21:24:25,360 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:25,360 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 5709 transitions. [2021-03-10 21:24:25,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:25,362 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:25,362 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:25,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-03-10 21:24:25,562 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:25,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:25,562 INFO L82 PathProgramCache]: Analyzing trace with hash -675352975, now seen corresponding path program 169 times [2021-03-10 21:24:25,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:25,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459330385] [2021-03-10 21:24:25,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:25,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:25,616 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:25,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459330385] [2021-03-10 21:24:25,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498181389] [2021-03-10 21:24:25,616 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:25,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:25,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:25,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:24:25,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:25,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 12 [2021-03-10 21:24:25,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825633827] [2021-03-10 21:24:25,670 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:24:25,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:25,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:24:25,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:24:25,670 INFO L87 Difference]: Start difference. First operand 2017 states and 5709 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:25,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:25,812 INFO L93 Difference]: Finished difference Result 2212 states and 5972 transitions. [2021-03-10 21:24:25,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:24:25,812 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:25,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:25,814 INFO L225 Difference]: With dead ends: 2212 [2021-03-10 21:24:25,814 INFO L226 Difference]: Without dead ends: 2208 [2021-03-10 21:24:25,814 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:24:25,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2208 states. [2021-03-10 21:24:25,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2208 to 2017. [2021-03-10 21:24:25,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.825892857142857) internal successors, (5697), 2016 states have internal predecessors, (5697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:25,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 5697 transitions. [2021-03-10 21:24:25,834 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 5697 transitions. Word has length 20 [2021-03-10 21:24:25,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:25,834 INFO L480 AbstractCegarLoop]: Abstraction has 2017 states and 5697 transitions. [2021-03-10 21:24:25,834 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:25,834 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 5697 transitions. [2021-03-10 21:24:25,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:25,835 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:25,835 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:26,036 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable625 [2021-03-10 21:24:26,036 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:26,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:26,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1748438355, now seen corresponding path program 170 times [2021-03-10 21:24:26,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:26,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060517856] [2021-03-10 21:24:26,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:26,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:26,101 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:26,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060517856] [2021-03-10 21:24:26,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775387268] [2021-03-10 21:24:26,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:26,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:24:26,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:26,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:26,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:26,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:26,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-03-10 21:24:26,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760402384] [2021-03-10 21:24:26,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:24:26,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:26,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:24:26,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:26,177 INFO L87 Difference]: Start difference. First operand 2017 states and 5697 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:26,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:26,308 INFO L93 Difference]: Finished difference Result 2220 states and 5971 transitions. [2021-03-10 21:24:26,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:24:26,308 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:26,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:26,310 INFO L225 Difference]: With dead ends: 2220 [2021-03-10 21:24:26,310 INFO L226 Difference]: Without dead ends: 2214 [2021-03-10 21:24:26,310 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:26,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2214 states. [2021-03-10 21:24:26,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2214 to 2017. [2021-03-10 21:24:26,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2017 states, 2016 states have (on average 2.8179563492063493) internal successors, (5681), 2016 states have internal predecessors, (5681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:26,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2017 states to 2017 states and 5681 transitions. [2021-03-10 21:24:26,330 INFO L78 Accepts]: Start accepts. Automaton has 2017 states and 5681 transitions. Word has length 20 [2021-03-10 21:24:26,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:26,330 INFO L480 AbstractCegarLoop]: Abstraction has 2017 states and 5681 transitions. [2021-03-10 21:24:26,330 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:26,330 INFO L276 IsEmpty]: Start isEmpty. Operand 2017 states and 5681 transitions. [2021-03-10 21:24:26,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:26,332 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:26,332 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:26,532 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:26,532 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:26,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:26,532 INFO L82 PathProgramCache]: Analyzing trace with hash -654346767, now seen corresponding path program 171 times [2021-03-10 21:24:26,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:26,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639482598] [2021-03-10 21:24:26,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:26,595 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:26,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639482598] [2021-03-10 21:24:26,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330944221] [2021-03-10 21:24:26,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:26,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:24:26,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:26,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:24:26,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:26,652 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:26,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:26,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:24:26,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522843270] [2021-03-10 21:24:26,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:24:26,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:26,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:24:26,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:26,652 INFO L87 Difference]: Start difference. First operand 2017 states and 5681 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:26,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:26,794 INFO L93 Difference]: Finished difference Result 2831 states and 7603 transitions. [2021-03-10 21:24:26,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:24:26,794 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:26,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:26,797 INFO L225 Difference]: With dead ends: 2831 [2021-03-10 21:24:26,797 INFO L226 Difference]: Without dead ends: 2823 [2021-03-10 21:24:26,797 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 121.6ms TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:26,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2823 states. [2021-03-10 21:24:26,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2823 to 2036. [2021-03-10 21:24:26,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2036 states, 2035 states have (on average 2.8147420147420146) internal successors, (5728), 2035 states have internal predecessors, (5728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:26,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2036 states to 2036 states and 5728 transitions. [2021-03-10 21:24:26,818 INFO L78 Accepts]: Start accepts. Automaton has 2036 states and 5728 transitions. Word has length 20 [2021-03-10 21:24:26,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:26,818 INFO L480 AbstractCegarLoop]: Abstraction has 2036 states and 5728 transitions. [2021-03-10 21:24:26,818 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:26,818 INFO L276 IsEmpty]: Start isEmpty. Operand 2036 states and 5728 transitions. [2021-03-10 21:24:26,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:26,820 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:26,820 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:27,020 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable627,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:27,020 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:27,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:27,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1097245907, now seen corresponding path program 172 times [2021-03-10 21:24:27,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:27,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117026097] [2021-03-10 21:24:27,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:27,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:27,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117026097] [2021-03-10 21:24:27,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171010564] [2021-03-10 21:24:27,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:27,107 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:24:27,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:27,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:27,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:27,145 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:27,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:27,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-03-10 21:24:27,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078738463] [2021-03-10 21:24:27,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:24:27,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:27,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:24:27,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:24:27,146 INFO L87 Difference]: Start difference. First operand 2036 states and 5728 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:27,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:27,312 INFO L93 Difference]: Finished difference Result 2850 states and 7623 transitions. [2021-03-10 21:24:27,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:24:27,313 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:27,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:27,315 INFO L225 Difference]: With dead ends: 2850 [2021-03-10 21:24:27,315 INFO L226 Difference]: Without dead ends: 2840 [2021-03-10 21:24:27,315 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 139.3ms TimeCoverageRelationStatistics Valid=209, Invalid=441, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:24:27,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-03-10 21:24:27,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2053. [2021-03-10 21:24:27,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2052 states have (on average 2.8118908382066277) internal successors, (5770), 2052 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:27,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 5770 transitions. [2021-03-10 21:24:27,336 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 5770 transitions. Word has length 20 [2021-03-10 21:24:27,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:27,336 INFO L480 AbstractCegarLoop]: Abstraction has 2053 states and 5770 transitions. [2021-03-10 21:24:27,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:27,336 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 5770 transitions. [2021-03-10 21:24:27,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:27,337 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:27,338 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:27,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable628,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:27,538 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:27,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:27,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1942217359, now seen corresponding path program 173 times [2021-03-10 21:24:27,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:27,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265201624] [2021-03-10 21:24:27,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:27,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:27,608 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:27,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265201624] [2021-03-10 21:24:27,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644937150] [2021-03-10 21:24:27,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:27,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:24:27,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:27,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:27,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:27,664 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:27,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:27,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-03-10 21:24:27,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245624382] [2021-03-10 21:24:27,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:24:27,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:27,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:24:27,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:24:27,665 INFO L87 Difference]: Start difference. First operand 2053 states and 5770 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:27,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:27,862 INFO L93 Difference]: Finished difference Result 2624 states and 7060 transitions. [2021-03-10 21:24:27,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:24:27,862 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:27,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:27,865 INFO L225 Difference]: With dead ends: 2624 [2021-03-10 21:24:27,865 INFO L226 Difference]: Without dead ends: 2612 [2021-03-10 21:24:27,865 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 175.2ms TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:24:27,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2612 states. [2021-03-10 21:24:27,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2612 to 2055. [2021-03-10 21:24:27,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2055 states, 2054 states have (on average 2.809152872444012) internal successors, (5770), 2054 states have internal predecessors, (5770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:27,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2055 states to 2055 states and 5770 transitions. [2021-03-10 21:24:27,885 INFO L78 Accepts]: Start accepts. Automaton has 2055 states and 5770 transitions. Word has length 20 [2021-03-10 21:24:27,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:27,885 INFO L480 AbstractCegarLoop]: Abstraction has 2055 states and 5770 transitions. [2021-03-10 21:24:27,885 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:27,885 INFO L276 IsEmpty]: Start isEmpty. Operand 2055 states and 5770 transitions. [2021-03-10 21:24:27,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:27,887 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:27,887 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:28,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:28,087 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:28,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:28,088 INFO L82 PathProgramCache]: Analyzing trace with hash -2140466681, now seen corresponding path program 174 times [2021-03-10 21:24:28,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:28,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214686255] [2021-03-10 21:24:28,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:28,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:28,166 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:28,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214686255] [2021-03-10 21:24:28,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223456660] [2021-03-10 21:24:28,166 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:28,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:24:28,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:28,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:24:28,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:28,230 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:28,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:28,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-03-10 21:24:28,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652879728] [2021-03-10 21:24:28,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:24:28,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:28,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:24:28,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:24:28,231 INFO L87 Difference]: Start difference. First operand 2055 states and 5770 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:28,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:28,367 INFO L93 Difference]: Finished difference Result 2268 states and 6139 transitions. [2021-03-10 21:24:28,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:24:28,367 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:28,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:28,369 INFO L225 Difference]: With dead ends: 2268 [2021-03-10 21:24:28,369 INFO L226 Difference]: Without dead ends: 2264 [2021-03-10 21:24:28,369 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 134.3ms TimeCoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:24:28,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2264 states. [2021-03-10 21:24:28,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2264 to 2086. [2021-03-10 21:24:28,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 2085 states have (on average 2.8134292565947243) internal successors, (5866), 2085 states have internal predecessors, (5866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:28,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 5866 transitions. [2021-03-10 21:24:28,399 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 5866 transitions. Word has length 20 [2021-03-10 21:24:28,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:28,399 INFO L480 AbstractCegarLoop]: Abstraction has 2086 states and 5866 transitions. [2021-03-10 21:24:28,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:28,399 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 5866 transitions. [2021-03-10 21:24:28,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:28,401 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:28,401 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:28,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-03-10 21:24:28,601 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:28,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:28,602 INFO L82 PathProgramCache]: Analyzing trace with hash 1369412393, now seen corresponding path program 175 times [2021-03-10 21:24:28,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:28,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726359907] [2021-03-10 21:24:28,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:28,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:28,674 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:28,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726359907] [2021-03-10 21:24:28,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079208853] [2021-03-10 21:24:28,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:28,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:28,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:28,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:28,749 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:24:28,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:28,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 14 [2021-03-10 21:24:28,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472550081] [2021-03-10 21:24:28,750 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:24:28,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:28,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:24:28,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:24:28,750 INFO L87 Difference]: Start difference. First operand 2086 states and 5866 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:28,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:28,902 INFO L93 Difference]: Finished difference Result 2348 states and 6353 transitions. [2021-03-10 21:24:28,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:24:28,902 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:28,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:28,904 INFO L225 Difference]: With dead ends: 2348 [2021-03-10 21:24:28,904 INFO L226 Difference]: Without dead ends: 2340 [2021-03-10 21:24:28,904 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 135.3ms TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:28,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2340 states. [2021-03-10 21:24:28,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2340 to 2086. [2021-03-10 21:24:28,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2086 states, 2085 states have (on average 2.809592326139089) internal successors, (5858), 2085 states have internal predecessors, (5858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:28,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2086 states to 2086 states and 5858 transitions. [2021-03-10 21:24:28,924 INFO L78 Accepts]: Start accepts. Automaton has 2086 states and 5858 transitions. Word has length 20 [2021-03-10 21:24:28,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:28,924 INFO L480 AbstractCegarLoop]: Abstraction has 2086 states and 5858 transitions. [2021-03-10 21:24:28,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:28,924 INFO L276 IsEmpty]: Start isEmpty. Operand 2086 states and 5858 transitions. [2021-03-10 21:24:28,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:28,926 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:28,926 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:29,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-03-10 21:24:29,127 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:29,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:29,127 INFO L82 PathProgramCache]: Analyzing trace with hash 926513253, now seen corresponding path program 176 times [2021-03-10 21:24:29,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:29,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784718200] [2021-03-10 21:24:29,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:29,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:29,210 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:29,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784718200] [2021-03-10 21:24:29,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182823412] [2021-03-10 21:24:29,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:29,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:24:29,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:29,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:29,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:29,278 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:29,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:29,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 15 [2021-03-10 21:24:29,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022835361] [2021-03-10 21:24:29,278 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:24:29,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:29,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:24:29,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:24:29,279 INFO L87 Difference]: Start difference. First operand 2086 states and 5858 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:29,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:29,427 INFO L93 Difference]: Finished difference Result 2366 states and 6371 transitions. [2021-03-10 21:24:29,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:24:29,427 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:29,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:29,430 INFO L225 Difference]: With dead ends: 2366 [2021-03-10 21:24:29,430 INFO L226 Difference]: Without dead ends: 2356 [2021-03-10 21:24:29,430 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 157.8ms TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:24:29,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2356 states. [2021-03-10 21:24:29,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2356 to 2100. [2021-03-10 21:24:29,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2100 states, 2099 states have (on average 2.8075273939971415) internal successors, (5893), 2099 states have internal predecessors, (5893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:29,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2100 states to 2100 states and 5893 transitions. [2021-03-10 21:24:29,450 INFO L78 Accepts]: Start accepts. Automaton has 2100 states and 5893 transitions. Word has length 20 [2021-03-10 21:24:29,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:29,450 INFO L480 AbstractCegarLoop]: Abstraction has 2100 states and 5893 transitions. [2021-03-10 21:24:29,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:29,450 INFO L276 IsEmpty]: Start isEmpty. Operand 2100 states and 5893 transitions. [2021-03-10 21:24:29,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:29,453 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:29,453 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:29,674 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable632 [2021-03-10 21:24:29,674 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:29,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:29,674 INFO L82 PathProgramCache]: Analyzing trace with hash 81541801, now seen corresponding path program 177 times [2021-03-10 21:24:29,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:29,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225163257] [2021-03-10 21:24:29,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:29,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:29,746 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:29,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225163257] [2021-03-10 21:24:29,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589364147] [2021-03-10 21:24:29,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:29,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:24:29,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:29,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:24:29,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:29,823 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:29,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:29,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-03-10 21:24:29,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513138129] [2021-03-10 21:24:29,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:24:29,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:29,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:24:29,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:24:29,824 INFO L87 Difference]: Start difference. First operand 2100 states and 5893 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:30,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:30,015 INFO L93 Difference]: Finished difference Result 2617 states and 7055 transitions. [2021-03-10 21:24:30,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:24:30,015 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:30,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:30,018 INFO L225 Difference]: With dead ends: 2617 [2021-03-10 21:24:30,018 INFO L226 Difference]: Without dead ends: 2605 [2021-03-10 21:24:30,018 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 189.3ms TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:24:30,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2021-03-10 21:24:30,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 2100. [2021-03-10 21:24:30,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2100 states, 2099 states have (on average 2.806574559313959) internal successors, (5891), 2099 states have internal predecessors, (5891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:30,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2100 states to 2100 states and 5891 transitions. [2021-03-10 21:24:30,041 INFO L78 Accepts]: Start accepts. Automaton has 2100 states and 5891 transitions. Word has length 20 [2021-03-10 21:24:30,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:30,041 INFO L480 AbstractCegarLoop]: Abstraction has 2100 states and 5891 transitions. [2021-03-10 21:24:30,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:30,041 INFO L276 IsEmpty]: Start isEmpty. Operand 2100 states and 5891 transitions. [2021-03-10 21:24:30,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:30,043 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:30,043 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:30,243 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable633,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:30,243 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:30,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:30,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1400047683, now seen corresponding path program 178 times [2021-03-10 21:24:30,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:30,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517661755] [2021-03-10 21:24:30,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:30,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:30,343 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:30,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517661755] [2021-03-10 21:24:30,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214090813] [2021-03-10 21:24:30,343 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:30,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:24:30,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:30,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:24:30,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:30,417 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:30,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:30,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-03-10 21:24:30,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384466942] [2021-03-10 21:24:30,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:24:30,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:30,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:24:30,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:24:30,418 INFO L87 Difference]: Start difference. First operand 2100 states and 5891 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:30,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:30,538 INFO L93 Difference]: Finished difference Result 2417 states and 6519 transitions. [2021-03-10 21:24:30,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:24:30,539 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:30,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:30,542 INFO L225 Difference]: With dead ends: 2417 [2021-03-10 21:24:30,542 INFO L226 Difference]: Without dead ends: 2417 [2021-03-10 21:24:30,543 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 116.3ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:24:30,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-03-10 21:24:30,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 2170. [2021-03-10 21:24:30,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2169 states have (on average 2.827109266943292) internal successors, (6132), 2169 states have internal predecessors, (6132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:30,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 6132 transitions. [2021-03-10 21:24:30,574 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 6132 transitions. Word has length 20 [2021-03-10 21:24:30,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:30,574 INFO L480 AbstractCegarLoop]: Abstraction has 2170 states and 6132 transitions. [2021-03-10 21:24:30,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:30,574 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 6132 transitions. [2021-03-10 21:24:30,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:30,577 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:30,577 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:30,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable634,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:30,798 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:30,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:30,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1677748861, now seen corresponding path program 179 times [2021-03-10 21:24:30,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:30,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231964355] [2021-03-10 21:24:30,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:30,874 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:30,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231964355] [2021-03-10 21:24:30,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372201066] [2021-03-10 21:24:30,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:30,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:24:30,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:30,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:24:30,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:30,950 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:30,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:30,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 16 [2021-03-10 21:24:30,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741875513] [2021-03-10 21:24:30,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:24:30,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:30,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:24:30,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:24:30,950 INFO L87 Difference]: Start difference. First operand 2170 states and 6132 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:31,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:31,122 INFO L93 Difference]: Finished difference Result 2716 states and 7385 transitions. [2021-03-10 21:24:31,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:24:31,122 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:31,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:31,125 INFO L225 Difference]: With dead ends: 2716 [2021-03-10 21:24:31,125 INFO L226 Difference]: Without dead ends: 2704 [2021-03-10 21:24:31,125 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 176.3ms TimeCoverageRelationStatistics Valid=206, Invalid=496, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:24:31,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2704 states. [2021-03-10 21:24:31,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2704 to 2170. [2021-03-10 21:24:31,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2170 states, 2169 states have (on average 2.8261871830336562) internal successors, (6130), 2169 states have internal predecessors, (6130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:31,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2170 states to 2170 states and 6130 transitions. [2021-03-10 21:24:31,147 INFO L78 Accepts]: Start accepts. Automaton has 2170 states and 6130 transitions. Word has length 20 [2021-03-10 21:24:31,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:31,147 INFO L480 AbstractCegarLoop]: Abstraction has 2170 states and 6130 transitions. [2021-03-10 21:24:31,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:31,147 INFO L276 IsEmpty]: Start isEmpty. Operand 2170 states and 6130 transitions. [2021-03-10 21:24:31,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:31,149 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:31,149 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:31,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable635 [2021-03-10 21:24:31,349 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:31,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:31,350 INFO L82 PathProgramCache]: Analyzing trace with hash 682973831, now seen corresponding path program 180 times [2021-03-10 21:24:31,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:31,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390936276] [2021-03-10 21:24:31,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:31,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:31,419 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:31,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390936276] [2021-03-10 21:24:31,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136199087] [2021-03-10 21:24:31,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:31,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:24:31,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:31,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:24:31,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:31,482 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 28 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:31,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:31,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 14 [2021-03-10 21:24:31,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963948486] [2021-03-10 21:24:31,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:24:31,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:31,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:24:31,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:24:31,482 INFO L87 Difference]: Start difference. First operand 2170 states and 6130 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:31,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:31,563 INFO L93 Difference]: Finished difference Result 2664 states and 7257 transitions. [2021-03-10 21:24:31,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:24:31,563 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:31,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:31,566 INFO L225 Difference]: With dead ends: 2664 [2021-03-10 21:24:31,566 INFO L226 Difference]: Without dead ends: 2664 [2021-03-10 21:24:31,566 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:24:31,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2664 states. [2021-03-10 21:24:31,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2664 to 2389. [2021-03-10 21:24:31,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2389 states, 2388 states have (on average 2.8618090452261304) internal successors, (6834), 2388 states have internal predecessors, (6834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:31,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2389 states to 2389 states and 6834 transitions. [2021-03-10 21:24:31,590 INFO L78 Accepts]: Start accepts. Automaton has 2389 states and 6834 transitions. Word has length 20 [2021-03-10 21:24:31,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:31,590 INFO L480 AbstractCegarLoop]: Abstraction has 2389 states and 6834 transitions. [2021-03-10 21:24:31,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:31,590 INFO L276 IsEmpty]: Start isEmpty. Operand 2389 states and 6834 transitions. [2021-03-10 21:24:31,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:31,592 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:31,592 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:31,792 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:31,792 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:31,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:31,793 INFO L82 PathProgramCache]: Analyzing trace with hash -1866538775, now seen corresponding path program 181 times [2021-03-10 21:24:31,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:31,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898680983] [2021-03-10 21:24:31,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:31,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:31,873 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:31,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898680983] [2021-03-10 21:24:31,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641377841] [2021-03-10 21:24:31,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:31,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:31,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:31,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:31,940 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 35 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:31,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:31,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 15 [2021-03-10 21:24:31,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391996612] [2021-03-10 21:24:31,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:24:31,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:31,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:24:31,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:24:31,941 INFO L87 Difference]: Start difference. First operand 2389 states and 6834 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:32,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:32,025 INFO L93 Difference]: Finished difference Result 2613 states and 7149 transitions. [2021-03-10 21:24:32,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:24:32,026 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:32,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:32,029 INFO L225 Difference]: With dead ends: 2613 [2021-03-10 21:24:32,029 INFO L226 Difference]: Without dead ends: 2613 [2021-03-10 21:24:32,029 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:24:32,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2613 states. [2021-03-10 21:24:32,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2613 to 2388. [2021-03-10 21:24:32,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 2.860913280268119) internal successors, (6829), 2387 states have internal predecessors, (6829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:32,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6829 transitions. [2021-03-10 21:24:32,054 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6829 transitions. Word has length 20 [2021-03-10 21:24:32,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:32,054 INFO L480 AbstractCegarLoop]: Abstraction has 2388 states and 6829 transitions. [2021-03-10 21:24:32,055 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:32,055 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6829 transitions. [2021-03-10 21:24:32,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:32,057 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:32,057 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:32,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable637 [2021-03-10 21:24:32,257 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:32,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:32,257 INFO L82 PathProgramCache]: Analyzing trace with hash -155925467, now seen corresponding path program 182 times [2021-03-10 21:24:32,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:32,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049593170] [2021-03-10 21:24:32,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:32,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:32,336 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:32,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049593170] [2021-03-10 21:24:32,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339877746] [2021-03-10 21:24:32,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:32,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:24:32,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:32,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:32,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:32,430 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 31 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:24:32,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:32,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 14 [2021-03-10 21:24:32,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647178514] [2021-03-10 21:24:32,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:24:32,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:32,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:24:32,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:24:32,431 INFO L87 Difference]: Start difference. First operand 2388 states and 6829 transitions. Second operand has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:32,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:32,565 INFO L93 Difference]: Finished difference Result 2617 states and 7158 transitions. [2021-03-10 21:24:32,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:24:32,566 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:32,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:32,568 INFO L225 Difference]: With dead ends: 2617 [2021-03-10 21:24:32,568 INFO L226 Difference]: Without dead ends: 2615 [2021-03-10 21:24:32,568 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:24:32,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2615 states. [2021-03-10 21:24:32,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2615 to 2388. [2021-03-10 21:24:32,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2388 states, 2387 states have (on average 2.8600754084625053) internal successors, (6827), 2387 states have internal predecessors, (6827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:32,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2388 states to 2388 states and 6827 transitions. [2021-03-10 21:24:32,592 INFO L78 Accepts]: Start accepts. Automaton has 2388 states and 6827 transitions. Word has length 20 [2021-03-10 21:24:32,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:32,592 INFO L480 AbstractCegarLoop]: Abstraction has 2388 states and 6827 transitions. [2021-03-10 21:24:32,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:32,592 INFO L276 IsEmpty]: Start isEmpty. Operand 2388 states and 6827 transitions. [2021-03-10 21:24:32,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:32,593 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:32,594 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:32,794 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable638,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:32,794 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:32,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:32,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1333479529, now seen corresponding path program 183 times [2021-03-10 21:24:32,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:32,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621925946] [2021-03-10 21:24:32,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:32,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:32,874 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:32,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621925946] [2021-03-10 21:24:32,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819642279] [2021-03-10 21:24:32,875 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:24:32,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:24:32,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:32,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:24:32,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:32,953 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:32,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:32,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 15 [2021-03-10 21:24:32,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427492913] [2021-03-10 21:24:32,954 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:24:32,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:32,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:24:32,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:24:32,954 INFO L87 Difference]: Start difference. First operand 2388 states and 6827 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:33,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:33,095 INFO L93 Difference]: Finished difference Result 2623 states and 7164 transitions. [2021-03-10 21:24:33,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:24:33,095 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:33,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:33,098 INFO L225 Difference]: With dead ends: 2623 [2021-03-10 21:24:33,098 INFO L226 Difference]: Without dead ends: 2619 [2021-03-10 21:24:33,098 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 142.9ms TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:33,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2619 states. [2021-03-10 21:24:33,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2619 to 2395. [2021-03-10 21:24:33,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 2.8613199665831246) internal successors, (6850), 2394 states have internal predecessors, (6850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:33,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 6850 transitions. [2021-03-10 21:24:33,121 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 6850 transitions. Word has length 20 [2021-03-10 21:24:33,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:33,121 INFO L480 AbstractCegarLoop]: Abstraction has 2395 states and 6850 transitions. [2021-03-10 21:24:33,121 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:33,121 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 6850 transitions. [2021-03-10 21:24:33,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:33,123 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:33,123 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:33,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable639 [2021-03-10 21:24:33,324 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:33,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:33,324 INFO L82 PathProgramCache]: Analyzing trace with hash 260394149, now seen corresponding path program 184 times [2021-03-10 21:24:33,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:33,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274764470] [2021-03-10 21:24:33,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:33,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:33,391 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:33,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274764470] [2021-03-10 21:24:33,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156892415] [2021-03-10 21:24:33,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:33,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:24:33,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:33,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:33,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:33,488 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:24:33,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:33,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 15 [2021-03-10 21:24:33,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545424155] [2021-03-10 21:24:33,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:24:33,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:33,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:24:33,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:24:33,489 INFO L87 Difference]: Start difference. First operand 2395 states and 6850 transitions. Second operand has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:33,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:33,627 INFO L93 Difference]: Finished difference Result 3316 states and 9099 transitions. [2021-03-10 21:24:33,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:24:33,628 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:33,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:33,631 INFO L225 Difference]: With dead ends: 3316 [2021-03-10 21:24:33,631 INFO L226 Difference]: Without dead ends: 3310 [2021-03-10 21:24:33,631 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 129.1ms TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:33,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3310 states. [2021-03-10 21:24:33,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3310 to 2395. [2021-03-10 21:24:33,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2394 states have (on average 2.8592314118629907) internal successors, (6845), 2394 states have internal predecessors, (6845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:33,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 6845 transitions. [2021-03-10 21:24:33,656 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 6845 transitions. Word has length 20 [2021-03-10 21:24:33,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:33,656 INFO L480 AbstractCegarLoop]: Abstraction has 2395 states and 6845 transitions. [2021-03-10 21:24:33,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.8125) internal successors, (29), 15 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:33,656 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 6845 transitions. [2021-03-10 21:24:33,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:33,658 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:33,658 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:33,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable640 [2021-03-10 21:24:33,859 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:33,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:33,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1354485737, now seen corresponding path program 185 times [2021-03-10 21:24:33,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:33,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529851203] [2021-03-10 21:24:33,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:33,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:33,942 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:33,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529851203] [2021-03-10 21:24:33,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926216461] [2021-03-10 21:24:33,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:24:33,968 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:24:33,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:33,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:24:33,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:34,031 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 22 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:34,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:34,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 16 [2021-03-10 21:24:34,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689949979] [2021-03-10 21:24:34,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:24:34,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:34,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:24:34,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:24:34,032 INFO L87 Difference]: Start difference. First operand 2395 states and 6845 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:34,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:34,223 INFO L93 Difference]: Finished difference Result 3332 states and 9114 transitions. [2021-03-10 21:24:34,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:24:34,224 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:34,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:34,228 INFO L225 Difference]: With dead ends: 3332 [2021-03-10 21:24:34,228 INFO L226 Difference]: Without dead ends: 3324 [2021-03-10 21:24:34,228 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 183.9ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:24:34,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3324 states. [2021-03-10 21:24:34,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3324 to 2411. [2021-03-10 21:24:34,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2411 states, 2410 states have (on average 2.85850622406639) internal successors, (6889), 2410 states have internal predecessors, (6889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:34,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2411 states to 2411 states and 6889 transitions. [2021-03-10 21:24:34,262 INFO L78 Accepts]: Start accepts. Automaton has 2411 states and 6889 transitions. Word has length 20 [2021-03-10 21:24:34,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:34,262 INFO L480 AbstractCegarLoop]: Abstraction has 2411 states and 6889 transitions. [2021-03-10 21:24:34,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:34,263 INFO L276 IsEmpty]: Start isEmpty. Operand 2411 states and 6889 transitions. [2021-03-10 21:24:34,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:34,265 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:34,265 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:34,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 187 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-03-10 21:24:34,485 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:34,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:34,485 INFO L82 PathProgramCache]: Analyzing trace with hash 911586597, now seen corresponding path program 186 times [2021-03-10 21:24:34,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:34,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721178099] [2021-03-10 21:24:34,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:34,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:34,572 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:34,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721178099] [2021-03-10 21:24:34,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881103784] [2021-03-10 21:24:34,573 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:34,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:24:34,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:34,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:24:34,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:34,654 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:34,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:34,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 16 [2021-03-10 21:24:34,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241409132] [2021-03-10 21:24:34,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:24:34,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:34,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:24:34,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:24:34,655 INFO L87 Difference]: Start difference. First operand 2411 states and 6889 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:34,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:34,891 INFO L93 Difference]: Finished difference Result 3194 states and 8791 transitions. [2021-03-10 21:24:34,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:24:34,892 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:34,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:34,896 INFO L225 Difference]: With dead ends: 3194 [2021-03-10 21:24:34,896 INFO L226 Difference]: Without dead ends: 3184 [2021-03-10 21:24:34,896 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 199.6ms TimeCoverageRelationStatistics Valid=183, Invalid=467, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:24:34,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2021-03-10 21:24:34,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 2411. [2021-03-10 21:24:34,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2411 states, 2410 states have (on average 2.857676348547718) internal successors, (6887), 2410 states have internal predecessors, (6887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:34,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2411 states to 2411 states and 6887 transitions. [2021-03-10 21:24:34,933 INFO L78 Accepts]: Start accepts. Automaton has 2411 states and 6887 transitions. Word has length 20 [2021-03-10 21:24:34,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:34,933 INFO L480 AbstractCegarLoop]: Abstraction has 2411 states and 6887 transitions. [2021-03-10 21:24:34,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:34,933 INFO L276 IsEmpty]: Start isEmpty. Operand 2411 states and 6887 transitions. [2021-03-10 21:24:34,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:34,935 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:34,936 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:35,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2021-03-10 21:24:35,151 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:35,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:35,151 INFO L82 PathProgramCache]: Analyzing trace with hash 66615145, now seen corresponding path program 187 times [2021-03-10 21:24:35,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:35,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49354601] [2021-03-10 21:24:35,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:35,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:35,226 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:35,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49354601] [2021-03-10 21:24:35,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143590614] [2021-03-10 21:24:35,226 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:35,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:35,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:35,309 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:35,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:35,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 17 [2021-03-10 21:24:35,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031276034] [2021-03-10 21:24:35,310 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:24:35,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:35,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:24:35,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:24:35,310 INFO L87 Difference]: Start difference. First operand 2411 states and 6887 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:35,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:35,485 INFO L93 Difference]: Finished difference Result 3215 states and 8812 transitions. [2021-03-10 21:24:35,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:24:35,485 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:35,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:35,488 INFO L225 Difference]: With dead ends: 3215 [2021-03-10 21:24:35,488 INFO L226 Difference]: Without dead ends: 3203 [2021-03-10 21:24:35,488 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 182.8ms TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:24:35,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3203 states. [2021-03-10 21:24:35,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3203 to 2417. [2021-03-10 21:24:35,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.857201986754967) internal successors, (6903), 2416 states have internal predecessors, (6903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:35,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 6903 transitions. [2021-03-10 21:24:35,513 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 6903 transitions. Word has length 20 [2021-03-10 21:24:35,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:35,513 INFO L480 AbstractCegarLoop]: Abstraction has 2417 states and 6903 transitions. [2021-03-10 21:24:35,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:35,513 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 6903 transitions. [2021-03-10 21:24:35,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 21:24:35,515 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:35,515 INFO L519 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:35,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable643,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:35,719 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:35,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:35,719 INFO L82 PathProgramCache]: Analyzing trace with hash -357696091, now seen corresponding path program 188 times [2021-03-10 21:24:35,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:35,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566343256] [2021-03-10 21:24:35,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:35,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:35,797 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 29 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:35,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566343256] [2021-03-10 21:24:35,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118744176] [2021-03-10 21:24:35,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:35,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:24:35,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:35,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:24:35,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:35,891 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 35 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:35,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:35,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-03-10 21:24:35,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83699007] [2021-03-10 21:24:35,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:24:35,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:35,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:24:35,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:24:35,892 INFO L87 Difference]: Start difference. First operand 2417 states and 6903 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:36,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:36,052 INFO L93 Difference]: Finished difference Result 2609 states and 7349 transitions. [2021-03-10 21:24:36,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:24:36,053 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 21:24:36,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:36,055 INFO L225 Difference]: With dead ends: 2609 [2021-03-10 21:24:36,055 INFO L226 Difference]: Without dead ends: 2602 [2021-03-10 21:24:36,056 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 198.0ms TimeCoverageRelationStatistics Valid=209, Invalid=603, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:24:36,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2602 states. [2021-03-10 21:24:36,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2602 to 2417. [2021-03-10 21:24:36,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 2.8567880794701987) internal successors, (6902), 2416 states have internal predecessors, (6902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:36,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 6902 transitions. [2021-03-10 21:24:36,078 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 6902 transitions. Word has length 20 [2021-03-10 21:24:36,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:36,079 INFO L480 AbstractCegarLoop]: Abstraction has 2417 states and 6902 transitions. [2021-03-10 21:24:36,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:36,079 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 6902 transitions. [2021-03-10 21:24:36,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:24:36,081 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:36,081 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:36,281 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable644 [2021-03-10 21:24:36,281 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:36,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:36,281 INFO L82 PathProgramCache]: Analyzing trace with hash 208179366, now seen corresponding path program 189 times [2021-03-10 21:24:36,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:36,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633597440] [2021-03-10 21:24:36,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:36,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:36,333 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:36,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633597440] [2021-03-10 21:24:36,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [121179819] [2021-03-10 21:24:36,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:36,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:24:36,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:36,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:24:36,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:36,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:36,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:24:39,195 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:24:39,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:39,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:24:39,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:24:39,202 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:39,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:39,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-03-10 21:24:39,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636022256] [2021-03-10 21:24:39,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:24:39,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:39,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:24:39,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:39,203 INFO L87 Difference]: Start difference. First operand 2417 states and 6902 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:39,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:39,451 INFO L93 Difference]: Finished difference Result 2595 states and 7261 transitions. [2021-03-10 21:24:39,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:24:39,452 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:24:39,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:39,455 INFO L225 Difference]: With dead ends: 2595 [2021-03-10 21:24:39,455 INFO L226 Difference]: Without dead ends: 2592 [2021-03-10 21:24:39,455 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 194.4ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:39,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2592 states. [2021-03-10 21:24:39,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2592 to 2489. [2021-03-10 21:24:39,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2489 states, 2488 states have (on average 2.8589228295819935) internal successors, (7113), 2488 states have internal predecessors, (7113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:39,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2489 states to 2489 states and 7113 transitions. [2021-03-10 21:24:39,478 INFO L78 Accepts]: Start accepts. Automaton has 2489 states and 7113 transitions. Word has length 21 [2021-03-10 21:24:39,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:39,478 INFO L480 AbstractCegarLoop]: Abstraction has 2489 states and 7113 transitions. [2021-03-10 21:24:39,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:39,478 INFO L276 IsEmpty]: Start isEmpty. Operand 2489 states and 7113 transitions. [2021-03-10 21:24:39,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:24:39,480 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:39,480 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:39,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable645 [2021-03-10 21:24:39,681 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:39,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:39,681 INFO L82 PathProgramCache]: Analyzing trace with hash -120892348, now seen corresponding path program 190 times [2021-03-10 21:24:39,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:39,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108164178] [2021-03-10 21:24:39,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:39,735 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:39,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108164178] [2021-03-10 21:24:39,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796031875] [2021-03-10 21:24:39,735 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:39,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:24:39,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:39,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:24:39,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:40,056 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:24:40,057 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:40,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:24:40,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:24:40,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:40,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:24:40,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:24:40,732 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:40,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:40,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-03-10 21:24:40,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640026020] [2021-03-10 21:24:40,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:24:40,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:40,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:24:40,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:40,734 INFO L87 Difference]: Start difference. First operand 2489 states and 7113 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:40,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:40,971 INFO L93 Difference]: Finished difference Result 2702 states and 7537 transitions. [2021-03-10 21:24:40,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:24:40,971 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:24:40,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:40,975 INFO L225 Difference]: With dead ends: 2702 [2021-03-10 21:24:40,975 INFO L226 Difference]: Without dead ends: 2699 [2021-03-10 21:24:40,975 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 196.6ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:40,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2021-03-10 21:24:41,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 2548. [2021-03-10 21:24:41,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2548 states, 2547 states have (on average 2.8696505692972125) internal successors, (7309), 2547 states have internal predecessors, (7309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:41,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2548 states to 2548 states and 7309 transitions. [2021-03-10 21:24:41,004 INFO L78 Accepts]: Start accepts. Automaton has 2548 states and 7309 transitions. Word has length 21 [2021-03-10 21:24:41,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:41,005 INFO L480 AbstractCegarLoop]: Abstraction has 2548 states and 7309 transitions. [2021-03-10 21:24:41,005 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:41,005 INFO L276 IsEmpty]: Start isEmpty. Operand 2548 states and 7309 transitions. [2021-03-10 21:24:41,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:24:41,006 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:41,006 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:41,207 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1372,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:41,207 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:41,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:41,207 INFO L82 PathProgramCache]: Analyzing trace with hash 670459314, now seen corresponding path program 191 times [2021-03-10 21:24:41,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:41,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595193268] [2021-03-10 21:24:41,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:41,261 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:24:41,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595193268] [2021-03-10 21:24:41,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936512182] [2021-03-10 21:24:41,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:41,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:24:41,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:41,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:24:41,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:41,593 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:24:41,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:41,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:24:41,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:24:41,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:41,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:24:41,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:24:41,994 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:41,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:41,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-03-10 21:24:41,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469230273] [2021-03-10 21:24:41,994 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:24:41,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:41,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:24:41,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:41,995 INFO L87 Difference]: Start difference. First operand 2548 states and 7309 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:42,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:42,171 INFO L93 Difference]: Finished difference Result 2762 states and 7744 transitions. [2021-03-10 21:24:42,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:24:42,172 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:24:42,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:42,175 INFO L225 Difference]: With dead ends: 2762 [2021-03-10 21:24:42,175 INFO L226 Difference]: Without dead ends: 2759 [2021-03-10 21:24:42,175 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 210.7ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:42,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2759 states. [2021-03-10 21:24:42,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2759 to 2605. [2021-03-10 21:24:42,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2605 states, 2604 states have (on average 2.883640552995392) internal successors, (7509), 2604 states have internal predecessors, (7509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:42,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2605 states to 2605 states and 7509 transitions. [2021-03-10 21:24:42,203 INFO L78 Accepts]: Start accepts. Automaton has 2605 states and 7509 transitions. Word has length 21 [2021-03-10 21:24:42,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:42,203 INFO L480 AbstractCegarLoop]: Abstraction has 2605 states and 7509 transitions. [2021-03-10 21:24:42,203 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:42,203 INFO L276 IsEmpty]: Start isEmpty. Operand 2605 states and 7509 transitions. [2021-03-10 21:24:42,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:24:42,205 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:42,205 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:42,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1568 [2021-03-10 21:24:42,407 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:42,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:42,408 INFO L82 PathProgramCache]: Analyzing trace with hash -567442940, now seen corresponding path program 192 times [2021-03-10 21:24:42,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:42,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158168041] [2021-03-10 21:24:42,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:42,458 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:42,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158168041] [2021-03-10 21:24:42,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295155409] [2021-03-10 21:24:42,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:42,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:24:42,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:42,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:24:42,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:42,756 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:24:42,756 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:42,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:24:43,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:24:43,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:43,560 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:24:43,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:24:43,567 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:43,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:43,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-03-10 21:24:43,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83366580] [2021-03-10 21:24:43,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:24:43,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:43,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:24:43,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:43,568 INFO L87 Difference]: Start difference. First operand 2605 states and 7509 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:43,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:43,848 INFO L93 Difference]: Finished difference Result 2824 states and 7965 transitions. [2021-03-10 21:24:43,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:24:43,848 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:24:43,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:43,852 INFO L225 Difference]: With dead ends: 2824 [2021-03-10 21:24:43,852 INFO L226 Difference]: Without dead ends: 2821 [2021-03-10 21:24:43,852 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 192.0ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:43,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2821 states. [2021-03-10 21:24:43,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2821 to 2666. [2021-03-10 21:24:43,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2666 states, 2665 states have (on average 2.900187617260788) internal successors, (7729), 2665 states have internal predecessors, (7729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:43,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2666 states to 2666 states and 7729 transitions. [2021-03-10 21:24:43,878 INFO L78 Accepts]: Start accepts. Automaton has 2666 states and 7729 transitions. Word has length 21 [2021-03-10 21:24:43,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:43,878 INFO L480 AbstractCegarLoop]: Abstraction has 2666 states and 7729 transitions. [2021-03-10 21:24:43,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:43,878 INFO L276 IsEmpty]: Start isEmpty. Operand 2666 states and 7729 transitions. [2021-03-10 21:24:43,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:24:43,880 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:43,880 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:44,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1759,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:44,081 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:44,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:44,081 INFO L82 PathProgramCache]: Analyzing trace with hash -287707150, now seen corresponding path program 193 times [2021-03-10 21:24:44,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:44,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32553074] [2021-03-10 21:24:44,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:44,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:44,132 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:24:44,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32553074] [2021-03-10 21:24:44,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713848902] [2021-03-10 21:24:44,132 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:44,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:24:44,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:44,432 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:24:44,433 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:44,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:24:44,879 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:24:44,880 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:44,881 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:24:44,881 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:24:44,888 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:44,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:44,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-03-10 21:24:44,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217978444] [2021-03-10 21:24:44,888 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:24:44,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:44,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:24:44,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:44,888 INFO L87 Difference]: Start difference. First operand 2666 states and 7729 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:45,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:45,079 INFO L93 Difference]: Finished difference Result 2927 states and 8298 transitions. [2021-03-10 21:24:45,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:24:45,079 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:24:45,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:45,083 INFO L225 Difference]: With dead ends: 2927 [2021-03-10 21:24:45,083 INFO L226 Difference]: Without dead ends: 2924 [2021-03-10 21:24:45,083 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 195.5ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:45,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2924 states. [2021-03-10 21:24:45,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2924 to 2756. [2021-03-10 21:24:45,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2756 states, 2755 states have (on average 2.9219600725952812) internal successors, (8050), 2755 states have internal predecessors, (8050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:45,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2756 states to 2756 states and 8050 transitions. [2021-03-10 21:24:45,116 INFO L78 Accepts]: Start accepts. Automaton has 2756 states and 8050 transitions. Word has length 21 [2021-03-10 21:24:45,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:45,116 INFO L480 AbstractCegarLoop]: Abstraction has 2756 states and 8050 transitions. [2021-03-10 21:24:45,116 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:45,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2756 states and 8050 transitions. [2021-03-10 21:24:45,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:24:45,118 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:45,118 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:45,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2107 [2021-03-10 21:24:45,319 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:45,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:45,319 INFO L82 PathProgramCache]: Analyzing trace with hash -205832252, now seen corresponding path program 194 times [2021-03-10 21:24:45,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:45,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403295358] [2021-03-10 21:24:45,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:45,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:45,372 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:45,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403295358] [2021-03-10 21:24:45,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871709561] [2021-03-10 21:24:45,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:45,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:24:45,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:45,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:24:45,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:45,672 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:45,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:24:46,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:24:46,014 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:46,014 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:24:46,014 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:24:46,034 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:46,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:46,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-03-10 21:24:46,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468678534] [2021-03-10 21:24:46,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:24:46,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:46,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:24:46,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:46,035 INFO L87 Difference]: Start difference. First operand 2756 states and 8050 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:46,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:46,365 INFO L93 Difference]: Finished difference Result 3020 states and 8621 transitions. [2021-03-10 21:24:46,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:24:46,366 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:24:46,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:46,369 INFO L225 Difference]: With dead ends: 3020 [2021-03-10 21:24:46,369 INFO L226 Difference]: Without dead ends: 3017 [2021-03-10 21:24:46,369 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 197.1ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:46,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3017 states. [2021-03-10 21:24:46,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3017 to 2845. [2021-03-10 21:24:46,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2845 states, 2844 states have (on average 2.9433895921237694) internal successors, (8371), 2844 states have internal predecessors, (8371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:46,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2845 states to 2845 states and 8371 transitions. [2021-03-10 21:24:46,397 INFO L78 Accepts]: Start accepts. Automaton has 2845 states and 8371 transitions. Word has length 21 [2021-03-10 21:24:46,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:46,397 INFO L480 AbstractCegarLoop]: Abstraction has 2845 states and 8371 transitions. [2021-03-10 21:24:46,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:46,397 INFO L276 IsEmpty]: Start isEmpty. Operand 2845 states and 8371 transitions. [2021-03-10 21:24:46,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:24:46,399 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:46,399 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:46,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2270,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:46,600 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:46,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:46,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1962677710, now seen corresponding path program 195 times [2021-03-10 21:24:46,600 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:46,600 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728086106] [2021-03-10 21:24:46,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:46,651 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:24:46,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728086106] [2021-03-10 21:24:46,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898895091] [2021-03-10 21:24:46,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:46,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:24:46,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:46,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:24:46,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:46,957 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-03-10 21:24:46,958 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:46,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:24:47,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:24:47,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:47,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:24:47,752 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:24:47,759 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:47,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:47,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-03-10 21:24:47,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601156519] [2021-03-10 21:24:47,759 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:24:47,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:47,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:24:47,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:47,760 INFO L87 Difference]: Start difference. First operand 2845 states and 8371 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:48,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:48,022 INFO L93 Difference]: Finished difference Result 3164 states and 9122 transitions. [2021-03-10 21:24:48,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:24:48,022 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:24:48,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:48,026 INFO L225 Difference]: With dead ends: 3164 [2021-03-10 21:24:48,026 INFO L226 Difference]: Without dead ends: 3161 [2021-03-10 21:24:48,026 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 197.2ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:48,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3161 states. [2021-03-10 21:24:48,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3161 to 3004. [2021-03-10 21:24:48,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3004 states, 3003 states have (on average 2.965700965700966) internal successors, (8906), 3003 states have internal predecessors, (8906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:48,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3004 states to 3004 states and 8906 transitions. [2021-03-10 21:24:48,056 INFO L78 Accepts]: Start accepts. Automaton has 3004 states and 8906 transitions. Word has length 21 [2021-03-10 21:24:48,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:48,056 INFO L480 AbstractCegarLoop]: Abstraction has 3004 states and 8906 transitions. [2021-03-10 21:24:48,057 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:48,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3004 states and 8906 transitions. [2021-03-10 21:24:48,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:24:48,059 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:48,059 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:48,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2424 [2021-03-10 21:24:48,260 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:48,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:48,260 INFO L82 PathProgramCache]: Analyzing trace with hash -590312060, now seen corresponding path program 196 times [2021-03-10 21:24:48,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:48,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714723029] [2021-03-10 21:24:48,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:48,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:48,310 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:48,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714723029] [2021-03-10 21:24:48,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324146786] [2021-03-10 21:24:48,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:48,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:24:48,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:48,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:24:48,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:48,650 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:48,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:24:49,270 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:24:49,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:49,272 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:24:49,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:24:49,278 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:49,278 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:49,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-03-10 21:24:49,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854913517] [2021-03-10 21:24:49,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:24:49,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:49,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:24:49,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:49,279 INFO L87 Difference]: Start difference. First operand 3004 states and 8906 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:49,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:49,592 INFO L93 Difference]: Finished difference Result 3650 states and 10596 transitions. [2021-03-10 21:24:49,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:24:49,593 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:24:49,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:49,598 INFO L225 Difference]: With dead ends: 3650 [2021-03-10 21:24:49,598 INFO L226 Difference]: Without dead ends: 3647 [2021-03-10 21:24:49,598 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 196.8ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:49,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3647 states. [2021-03-10 21:24:49,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3647 to 3491. [2021-03-10 21:24:49,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3491 states, 3490 states have (on average 2.9773638968481375) internal successors, (10391), 3490 states have internal predecessors, (10391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:49,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3491 states to 3491 states and 10391 transitions. [2021-03-10 21:24:49,636 INFO L78 Accepts]: Start accepts. Automaton has 3491 states and 10391 transitions. Word has length 21 [2021-03-10 21:24:49,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:49,636 INFO L480 AbstractCegarLoop]: Abstraction has 3491 states and 10391 transitions. [2021-03-10 21:24:49,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:49,636 INFO L276 IsEmpty]: Start isEmpty. Operand 3491 states and 10391 transitions. [2021-03-10 21:24:49,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:24:49,639 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:49,639 INFO L519 BasicCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:49,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2745 [2021-03-10 21:24:49,839 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:49,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:49,840 INFO L82 PathProgramCache]: Analyzing trace with hash -996649870, now seen corresponding path program 197 times [2021-03-10 21:24:49,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:49,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528053197] [2021-03-10 21:24:49,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:49,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:49,890 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:49,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528053197] [2021-03-10 21:24:49,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096897079] [2021-03-10 21:24:49,890 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:49,910 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:24:49,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:49,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 21:24:49,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:50,194 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:50,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 15 new quantified variables, introduced 28 case distinctions, treesize of input 39 treesize of output 252 [2021-03-10 21:24:50,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:24:50,839 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:24:50,839 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:24:50,839 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-03-10 21:24:50,846 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:50,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:50,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-03-10 21:24:50,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655856659] [2021-03-10 21:24:50,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:24:50,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:50,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:24:50,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:50,847 INFO L87 Difference]: Start difference. First operand 3491 states and 10391 transitions. Second operand has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:51,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:51,117 INFO L93 Difference]: Finished difference Result 4057 states and 11844 transitions. [2021-03-10 21:24:51,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:24:51,117 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:24:51,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:51,122 INFO L225 Difference]: With dead ends: 4057 [2021-03-10 21:24:51,122 INFO L226 Difference]: Without dead ends: 4054 [2021-03-10 21:24:51,122 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 196.9ms TimeCoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:24:51,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4054 states. [2021-03-10 21:24:51,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4054 to 3906. [2021-03-10 21:24:51,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3906 states, 3905 states have (on average 2.9836107554417413) internal successors, (11651), 3905 states have internal predecessors, (11651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:51,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3906 states to 3906 states and 11651 transitions. [2021-03-10 21:24:51,164 INFO L78 Accepts]: Start accepts. Automaton has 3906 states and 11651 transitions. Word has length 21 [2021-03-10 21:24:51,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:51,164 INFO L480 AbstractCegarLoop]: Abstraction has 3906 states and 11651 transitions. [2021-03-10 21:24:51,164 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.565217391304348) internal successors, (36), 22 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:51,164 INFO L276 IsEmpty]: Start isEmpty. Operand 3906 states and 11651 transitions. [2021-03-10 21:24:51,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:24:51,167 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:51,167 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:51,368 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2956,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:51,368 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:51,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:51,368 INFO L82 PathProgramCache]: Analyzing trace with hash -836665722, now seen corresponding path program 198 times [2021-03-10 21:24:51,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:51,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706440919] [2021-03-10 21:24:51,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:51,456 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 28 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:51,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706440919] [2021-03-10 21:24:51,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175755148] [2021-03-10 21:24:51,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:51,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:24:51,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:51,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:24:51,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:51,525 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 36 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:51,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:51,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:24:51,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110498722] [2021-03-10 21:24:51,525 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:24:51,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:51,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:24:51,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:24:51,526 INFO L87 Difference]: Start difference. First operand 3906 states and 11651 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:51,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:51,712 INFO L93 Difference]: Finished difference Result 4087 states and 11914 transitions. [2021-03-10 21:24:51,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:24:51,712 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:24:51,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:51,716 INFO L225 Difference]: With dead ends: 4087 [2021-03-10 21:24:51,716 INFO L226 Difference]: Without dead ends: 4087 [2021-03-10 21:24:51,716 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 182.4ms TimeCoverageRelationStatistics Valid=286, Invalid=584, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:24:51,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4087 states. [2021-03-10 21:24:51,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4087 to 3867. [2021-03-10 21:24:51,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3867 states, 3866 states have (on average 2.982152095188826) internal successors, (11529), 3866 states have internal predecessors, (11529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:51,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3867 states to 3867 states and 11529 transitions. [2021-03-10 21:24:51,756 INFO L78 Accepts]: Start accepts. Automaton has 3867 states and 11529 transitions. Word has length 22 [2021-03-10 21:24:51,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:51,757 INFO L480 AbstractCegarLoop]: Abstraction has 3867 states and 11529 transitions. [2021-03-10 21:24:51,757 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:51,757 INFO L276 IsEmpty]: Start isEmpty. Operand 3867 states and 11529 transitions. [2021-03-10 21:24:51,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:24:51,760 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:51,760 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:51,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3207 [2021-03-10 21:24:51,960 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:51,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:51,961 INFO L82 PathProgramCache]: Analyzing trace with hash -2113302545, now seen corresponding path program 199 times [2021-03-10 21:24:51,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:51,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908179664] [2021-03-10 21:24:51,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:52,044 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:52,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908179664] [2021-03-10 21:24:52,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579850531] [2021-03-10 21:24:52,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:52,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:52,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:24:52,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:52,112 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:52,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:52,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:24:52,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033550740] [2021-03-10 21:24:52,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:24:52,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:52,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:24:52,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:24:52,113 INFO L87 Difference]: Start difference. First operand 3867 states and 11529 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:52,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:52,363 INFO L93 Difference]: Finished difference Result 4251 states and 12125 transitions. [2021-03-10 21:24:52,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:24:52,364 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:24:52,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:52,368 INFO L225 Difference]: With dead ends: 4251 [2021-03-10 21:24:52,368 INFO L226 Difference]: Without dead ends: 4240 [2021-03-10 21:24:52,369 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 215.6ms TimeCoverageRelationStatistics Valid=374, Invalid=748, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:24:52,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4240 states. [2021-03-10 21:24:52,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4240 to 3890. [2021-03-10 21:24:52,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3890 states, 3889 states have (on average 2.978657752635639) internal successors, (11584), 3889 states have internal predecessors, (11584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:52,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3890 states to 3890 states and 11584 transitions. [2021-03-10 21:24:52,435 INFO L78 Accepts]: Start accepts. Automaton has 3890 states and 11584 transitions. Word has length 22 [2021-03-10 21:24:52,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:52,435 INFO L480 AbstractCegarLoop]: Abstraction has 3890 states and 11584 transitions. [2021-03-10 21:24:52,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:52,436 INFO L276 IsEmpty]: Start isEmpty. Operand 3890 states and 11584 transitions. [2021-03-10 21:24:52,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:24:52,439 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:52,439 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:52,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3208,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:52,639 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:52,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:52,640 INFO L82 PathProgramCache]: Analyzing trace with hash 579717254, now seen corresponding path program 200 times [2021-03-10 21:24:52,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:52,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687811218] [2021-03-10 21:24:52,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:52,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:52,700 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:52,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687811218] [2021-03-10 21:24:52,700 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448090247] [2021-03-10 21:24:52,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:52,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:24:52,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:52,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:24:52,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:52,756 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 37 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:52,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:52,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:24:52,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229407920] [2021-03-10 21:24:52,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:24:52,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:52,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:24:52,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:24:52,756 INFO L87 Difference]: Start difference. First operand 3890 states and 11584 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:52,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:52,902 INFO L93 Difference]: Finished difference Result 3929 states and 11639 transitions. [2021-03-10 21:24:52,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:24:52,903 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:24:52,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:52,907 INFO L225 Difference]: With dead ends: 3929 [2021-03-10 21:24:52,907 INFO L226 Difference]: Without dead ends: 3928 [2021-03-10 21:24:52,907 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 101.1ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:24:52,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3928 states. [2021-03-10 21:24:52,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3928 to 3890. [2021-03-10 21:24:52,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3890 states, 3889 states have (on average 2.978143481614811) internal successors, (11582), 3889 states have internal predecessors, (11582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:52,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3890 states to 3890 states and 11582 transitions. [2021-03-10 21:24:52,950 INFO L78 Accepts]: Start accepts. Automaton has 3890 states and 11582 transitions. Word has length 22 [2021-03-10 21:24:52,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:52,951 INFO L480 AbstractCegarLoop]: Abstraction has 3890 states and 11582 transitions. [2021-03-10 21:24:52,951 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:52,951 INFO L276 IsEmpty]: Start isEmpty. Operand 3890 states and 11582 transitions. [2021-03-10 21:24:52,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:24:52,954 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:52,954 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:53,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3209 [2021-03-10 21:24:53,155 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:53,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:53,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1496773607, now seen corresponding path program 201 times [2021-03-10 21:24:53,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:53,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406114096] [2021-03-10 21:24:53,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:53,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:53,212 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:53,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406114096] [2021-03-10 21:24:53,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792171940] [2021-03-10 21:24:53,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:53,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:24:53,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:53,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:24:53,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:53,274 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:53,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:53,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:24:53,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481393197] [2021-03-10 21:24:53,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:24:53,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:53,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:24:53,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:24:53,275 INFO L87 Difference]: Start difference. First operand 3890 states and 11582 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:53,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:53,340 INFO L93 Difference]: Finished difference Result 4355 states and 12410 transitions. [2021-03-10 21:24:53,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:24:53,340 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:24:53,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:53,345 INFO L225 Difference]: With dead ends: 4355 [2021-03-10 21:24:53,345 INFO L226 Difference]: Without dead ends: 4355 [2021-03-10 21:24:53,345 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:53,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4355 states. [2021-03-10 21:24:53,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4355 to 3867. [2021-03-10 21:24:53,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3867 states, 3866 states have (on average 2.9733574754267975) internal successors, (11495), 3866 states have internal predecessors, (11495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:53,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3867 states to 3867 states and 11495 transitions. [2021-03-10 21:24:53,387 INFO L78 Accepts]: Start accepts. Automaton has 3867 states and 11495 transitions. Word has length 22 [2021-03-10 21:24:53,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:53,388 INFO L480 AbstractCegarLoop]: Abstraction has 3867 states and 11495 transitions. [2021-03-10 21:24:53,388 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:53,388 INFO L276 IsEmpty]: Start isEmpty. Operand 3867 states and 11495 transitions. [2021-03-10 21:24:53,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:24:53,391 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:53,391 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:53,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 203 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3210 [2021-03-10 21:24:53,592 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:53,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:53,592 INFO L82 PathProgramCache]: Analyzing trace with hash -374385774, now seen corresponding path program 202 times [2021-03-10 21:24:53,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:53,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090796660] [2021-03-10 21:24:53,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:53,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:53,647 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 16 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:53,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090796660] [2021-03-10 21:24:53,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255110135] [2021-03-10 21:24:53,647 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:53,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:24:53,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:53,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:24:53,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:53,708 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:53,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:53,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:24:53,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280207049] [2021-03-10 21:24:53,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:24:53,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:53,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:24:53,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:24:53,709 INFO L87 Difference]: Start difference. First operand 3867 states and 11495 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:53,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:53,823 INFO L93 Difference]: Finished difference Result 4245 states and 12197 transitions. [2021-03-10 21:24:53,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:24:53,824 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:24:53,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:53,829 INFO L225 Difference]: With dead ends: 4245 [2021-03-10 21:24:53,829 INFO L226 Difference]: Without dead ends: 4245 [2021-03-10 21:24:53,829 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:24:53,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4245 states. [2021-03-10 21:24:53,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4245 to 3908. [2021-03-10 21:24:53,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3908 states, 3907 states have (on average 2.975172766828769) internal successors, (11624), 3907 states have internal predecessors, (11624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:53,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3908 states to 3908 states and 11624 transitions. [2021-03-10 21:24:53,871 INFO L78 Accepts]: Start accepts. Automaton has 3908 states and 11624 transitions. Word has length 22 [2021-03-10 21:24:53,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:53,871 INFO L480 AbstractCegarLoop]: Abstraction has 3908 states and 11624 transitions. [2021-03-10 21:24:53,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:53,871 INFO L276 IsEmpty]: Start isEmpty. Operand 3908 states and 11624 transitions. [2021-03-10 21:24:53,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:24:53,874 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:53,874 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:54,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3211,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:54,075 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:54,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:54,075 INFO L82 PathProgramCache]: Analyzing trace with hash 570376209, now seen corresponding path program 203 times [2021-03-10 21:24:54,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:54,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810819773] [2021-03-10 21:24:54,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:54,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:54,129 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:54,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810819773] [2021-03-10 21:24:54,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972603639] [2021-03-10 21:24:54,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:54,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:24:54,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:54,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:24:54,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:54,186 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:54,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:54,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:24:54,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133682104] [2021-03-10 21:24:54,187 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:24:54,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:54,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:24:54,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:24:54,187 INFO L87 Difference]: Start difference. First operand 3908 states and 11624 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:54,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:54,337 INFO L93 Difference]: Finished difference Result 4249 states and 12137 transitions. [2021-03-10 21:24:54,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:24:54,337 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:24:54,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:54,341 INFO L225 Difference]: With dead ends: 4249 [2021-03-10 21:24:54,341 INFO L226 Difference]: Without dead ends: 4247 [2021-03-10 21:24:54,342 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=175, Invalid=287, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:24:54,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4247 states. [2021-03-10 21:24:54,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4247 to 3918. [2021-03-10 21:24:54,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 2.976257339800868) internal successors, (11658), 3917 states have internal predecessors, (11658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:54,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 11658 transitions. [2021-03-10 21:24:54,382 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 11658 transitions. Word has length 22 [2021-03-10 21:24:54,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:54,382 INFO L480 AbstractCegarLoop]: Abstraction has 3918 states and 11658 transitions. [2021-03-10 21:24:54,382 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:54,383 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 11658 transitions. [2021-03-10 21:24:54,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:24:54,386 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:54,386 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:54,586 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3212,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:54,586 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:54,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:54,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1371068916, now seen corresponding path program 204 times [2021-03-10 21:24:54,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:54,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257988005] [2021-03-10 21:24:54,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:54,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:54,644 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 24 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:54,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257988005] [2021-03-10 21:24:54,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661894560] [2021-03-10 21:24:54,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:54,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:24:54,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:54,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:24:54,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:54,702 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 30 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:54,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:54,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:24:54,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601542126] [2021-03-10 21:24:54,703 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:24:54,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:54,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:24:54,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:24:54,703 INFO L87 Difference]: Start difference. First operand 3918 states and 11658 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:54,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:54,861 INFO L93 Difference]: Finished difference Result 4124 states and 11966 transitions. [2021-03-10 21:24:54,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:24:54,861 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:24:54,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:54,866 INFO L225 Difference]: With dead ends: 4124 [2021-03-10 21:24:54,866 INFO L226 Difference]: Without dead ends: 4122 [2021-03-10 21:24:54,866 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 103.0ms TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:24:54,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4122 states. [2021-03-10 21:24:54,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4122 to 3900. [2021-03-10 21:24:54,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3900 states, 3899 states have (on average 2.9746088740702743) internal successors, (11598), 3899 states have internal predecessors, (11598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:54,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3900 states to 3900 states and 11598 transitions. [2021-03-10 21:24:54,906 INFO L78 Accepts]: Start accepts. Automaton has 3900 states and 11598 transitions. Word has length 22 [2021-03-10 21:24:54,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:54,906 INFO L480 AbstractCegarLoop]: Abstraction has 3900 states and 11598 transitions. [2021-03-10 21:24:54,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:54,906 INFO L276 IsEmpty]: Start isEmpty. Operand 3900 states and 11598 transitions. [2021-03-10 21:24:54,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:24:54,909 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:54,909 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:55,109 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3213,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:55,110 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:55,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:55,110 INFO L82 PathProgramCache]: Analyzing trace with hash -2006842027, now seen corresponding path program 205 times [2021-03-10 21:24:55,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:55,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022879187] [2021-03-10 21:24:55,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:55,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:55,164 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:55,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022879187] [2021-03-10 21:24:55,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024314797] [2021-03-10 21:24:55,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:55,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:55,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:24:55,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:55,229 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:55,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:55,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:24:55,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597253961] [2021-03-10 21:24:55,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:24:55,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:55,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:24:55,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:24:55,229 INFO L87 Difference]: Start difference. First operand 3900 states and 11598 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:55,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:55,292 INFO L93 Difference]: Finished difference Result 4352 states and 12338 transitions. [2021-03-10 21:24:55,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:24:55,293 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:24:55,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:55,297 INFO L225 Difference]: With dead ends: 4352 [2021-03-10 21:24:55,297 INFO L226 Difference]: Without dead ends: 4352 [2021-03-10 21:24:55,297 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:55,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4352 states. [2021-03-10 21:24:55,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4352 to 3904. [2021-03-10 21:24:55,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3904 states, 3903 states have (on average 2.9741224698949527) internal successors, (11608), 3903 states have internal predecessors, (11608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:55,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3904 states to 3904 states and 11608 transitions. [2021-03-10 21:24:55,354 INFO L78 Accepts]: Start accepts. Automaton has 3904 states and 11608 transitions. Word has length 22 [2021-03-10 21:24:55,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:55,354 INFO L480 AbstractCegarLoop]: Abstraction has 3904 states and 11608 transitions. [2021-03-10 21:24:55,354 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:55,354 INFO L276 IsEmpty]: Start isEmpty. Operand 3904 states and 11608 transitions. [2021-03-10 21:24:55,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:24:55,357 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:55,357 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:55,558 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3214 [2021-03-10 21:24:55,558 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:55,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:55,558 INFO L82 PathProgramCache]: Analyzing trace with hash -1213285072, now seen corresponding path program 206 times [2021-03-10 21:24:55,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:55,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961756789] [2021-03-10 21:24:55,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:55,617 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:55,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961756789] [2021-03-10 21:24:55,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343144812] [2021-03-10 21:24:55,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:55,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:24:55,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:55,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:24:55,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:55,677 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:55,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:55,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:24:55,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127147852] [2021-03-10 21:24:55,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:24:55,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:55,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:24:55,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:55,678 INFO L87 Difference]: Start difference. First operand 3904 states and 11608 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:55,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:55,856 INFO L93 Difference]: Finished difference Result 4085 states and 11883 transitions. [2021-03-10 21:24:55,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:24:55,856 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:24:55,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:55,861 INFO L225 Difference]: With dead ends: 4085 [2021-03-10 21:24:55,861 INFO L226 Difference]: Without dead ends: 4079 [2021-03-10 21:24:55,861 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:55,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4079 states. [2021-03-10 21:24:55,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4079 to 3861. [2021-03-10 21:24:55,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3861 states, 3860 states have (on average 2.978238341968912) internal successors, (11496), 3860 states have internal predecessors, (11496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:55,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3861 states to 3861 states and 11496 transitions. [2021-03-10 21:24:55,902 INFO L78 Accepts]: Start accepts. Automaton has 3861 states and 11496 transitions. Word has length 22 [2021-03-10 21:24:55,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:55,902 INFO L480 AbstractCegarLoop]: Abstraction has 3861 states and 11496 transitions. [2021-03-10 21:24:55,902 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:55,902 INFO L276 IsEmpty]: Start isEmpty. Operand 3861 states and 11496 transitions. [2021-03-10 21:24:55,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:24:55,905 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:55,905 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:56,105 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3215,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:56,106 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:56,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:56,106 INFO L82 PathProgramCache]: Analyzing trace with hash 559077935, now seen corresponding path program 207 times [2021-03-10 21:24:56,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:56,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011070657] [2021-03-10 21:24:56,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:56,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:56,163 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:56,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011070657] [2021-03-10 21:24:56,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212727296] [2021-03-10 21:24:56,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:56,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:24:56,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:56,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:24:56,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:56,232 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:56,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:56,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:24:56,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689613607] [2021-03-10 21:24:56,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:24:56,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:56,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:24:56,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:56,233 INFO L87 Difference]: Start difference. First operand 3861 states and 11496 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:56,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:56,316 INFO L93 Difference]: Finished difference Result 4587 states and 12943 transitions. [2021-03-10 21:24:56,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:24:56,316 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:24:56,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:56,320 INFO L225 Difference]: With dead ends: 4587 [2021-03-10 21:24:56,320 INFO L226 Difference]: Without dead ends: 4587 [2021-03-10 21:24:56,320 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:24:56,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4587 states. [2021-03-10 21:24:56,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4587 to 3836. [2021-03-10 21:24:56,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3836 states, 3835 states have (on average 2.9734028683181224) internal successors, (11403), 3835 states have internal predecessors, (11403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:56,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3836 states to 3836 states and 11403 transitions. [2021-03-10 21:24:56,362 INFO L78 Accepts]: Start accepts. Automaton has 3836 states and 11403 transitions. Word has length 22 [2021-03-10 21:24:56,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:56,362 INFO L480 AbstractCegarLoop]: Abstraction has 3836 states and 11403 transitions. [2021-03-10 21:24:56,362 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:56,363 INFO L276 IsEmpty]: Start isEmpty. Operand 3836 states and 11403 transitions. [2021-03-10 21:24:56,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:24:56,366 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:56,366 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:56,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3216 [2021-03-10 21:24:56,567 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:56,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:56,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1612288028, now seen corresponding path program 208 times [2021-03-10 21:24:56,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:56,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441090212] [2021-03-10 21:24:56,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:56,620 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:56,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441090212] [2021-03-10 21:24:56,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755481836] [2021-03-10 21:24:56,620 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:56,639 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:24:56,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:56,640 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:24:56,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:56,682 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:56,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:56,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:24:56,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254922966] [2021-03-10 21:24:56,683 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:24:56,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:56,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:24:56,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:24:56,683 INFO L87 Difference]: Start difference. First operand 3836 states and 11403 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:56,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:56,796 INFO L93 Difference]: Finished difference Result 4225 states and 12107 transitions. [2021-03-10 21:24:56,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:24:56,797 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:24:56,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:56,802 INFO L225 Difference]: With dead ends: 4225 [2021-03-10 21:24:56,802 INFO L226 Difference]: Without dead ends: 4225 [2021-03-10 21:24:56,802 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:24:56,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4225 states. [2021-03-10 21:24:56,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4225 to 3857. [2021-03-10 21:24:56,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3857 states, 3856 states have (on average 2.975103734439834) internal successors, (11472), 3856 states have internal predecessors, (11472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:56,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3857 states to 3857 states and 11472 transitions. [2021-03-10 21:24:56,845 INFO L78 Accepts]: Start accepts. Automaton has 3857 states and 11472 transitions. Word has length 22 [2021-03-10 21:24:56,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:56,845 INFO L480 AbstractCegarLoop]: Abstraction has 3857 states and 11472 transitions. [2021-03-10 21:24:56,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:56,845 INFO L276 IsEmpty]: Start isEmpty. Operand 3857 states and 11472 transitions. [2021-03-10 21:24:56,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:24:56,849 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:56,849 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:57,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3217 [2021-03-10 21:24:57,049 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:57,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:57,050 INFO L82 PathProgramCache]: Analyzing trace with hash -667526045, now seen corresponding path program 209 times [2021-03-10 21:24:57,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:57,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843094356] [2021-03-10 21:24:57,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:57,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:57,100 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:57,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843094356] [2021-03-10 21:24:57,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270515911] [2021-03-10 21:24:57,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:57,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:24:57,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:57,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:24:57,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:57,156 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:57,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:57,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:24:57,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823592015] [2021-03-10 21:24:57,157 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:24:57,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:57,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:24:57,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:24:57,157 INFO L87 Difference]: Start difference. First operand 3857 states and 11472 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:57,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:57,298 INFO L93 Difference]: Finished difference Result 4205 states and 11997 transitions. [2021-03-10 21:24:57,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:24:57,298 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:24:57,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:57,302 INFO L225 Difference]: With dead ends: 4205 [2021-03-10 21:24:57,302 INFO L226 Difference]: Without dead ends: 4203 [2021-03-10 21:24:57,302 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 100.3ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:24:57,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4203 states. [2021-03-10 21:24:57,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4203 to 3869. [2021-03-10 21:24:57,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3869 states, 3868 states have (on average 2.9762150982419855) internal successors, (11512), 3868 states have internal predecessors, (11512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:57,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3869 states to 3869 states and 11512 transitions. [2021-03-10 21:24:57,343 INFO L78 Accepts]: Start accepts. Automaton has 3869 states and 11512 transitions. Word has length 22 [2021-03-10 21:24:57,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:57,343 INFO L480 AbstractCegarLoop]: Abstraction has 3869 states and 11512 transitions. [2021-03-10 21:24:57,343 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:57,343 INFO L276 IsEmpty]: Start isEmpty. Operand 3869 states and 11512 transitions. [2021-03-10 21:24:57,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:24:57,346 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:57,346 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:57,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3218,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:57,548 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:57,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:57,548 INFO L82 PathProgramCache]: Analyzing trace with hash 133166662, now seen corresponding path program 210 times [2021-03-10 21:24:57,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:57,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772174040] [2021-03-10 21:24:57,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:57,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:57,602 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:57,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772174040] [2021-03-10 21:24:57,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705799829] [2021-03-10 21:24:57,602 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:57,623 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:24:57,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:57,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:24:57,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:57,674 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:57,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:57,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:24:57,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448233381] [2021-03-10 21:24:57,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:24:57,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:57,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:24:57,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:24:57,675 INFO L87 Difference]: Start difference. First operand 3869 states and 11512 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:57,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:57,838 INFO L93 Difference]: Finished difference Result 4090 states and 11844 transitions. [2021-03-10 21:24:57,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:24:57,838 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:24:57,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:57,842 INFO L225 Difference]: With dead ends: 4090 [2021-03-10 21:24:57,842 INFO L226 Difference]: Without dead ends: 4088 [2021-03-10 21:24:57,843 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 96.8ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:24:57,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4088 states. [2021-03-10 21:24:57,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4088 to 3838. [2021-03-10 21:24:57,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 2.973416731821736) internal successors, (11409), 3837 states have internal predecessors, (11409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:57,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 11409 transitions. [2021-03-10 21:24:57,886 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 11409 transitions. Word has length 22 [2021-03-10 21:24:57,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:57,886 INFO L480 AbstractCegarLoop]: Abstraction has 3838 states and 11409 transitions. [2021-03-10 21:24:57,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:57,886 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 11409 transitions. [2021-03-10 21:24:57,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:24:57,890 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:57,890 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:58,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3219 [2021-03-10 21:24:58,090 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:58,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:58,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1050223015, now seen corresponding path program 211 times [2021-03-10 21:24:58,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:58,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917834893] [2021-03-10 21:24:58,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:58,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:58,143 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:58,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917834893] [2021-03-10 21:24:58,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388908633] [2021-03-10 21:24:58,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:58,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:58,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:24:58,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:58,205 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:24:58,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:58,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:24:58,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211694445] [2021-03-10 21:24:58,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:24:58,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:58,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:24:58,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:24:58,206 INFO L87 Difference]: Start difference. First operand 3838 states and 11409 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:58,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:58,268 INFO L93 Difference]: Finished difference Result 4172 states and 11863 transitions. [2021-03-10 21:24:58,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:24:58,268 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:24:58,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:58,272 INFO L225 Difference]: With dead ends: 4172 [2021-03-10 21:24:58,272 INFO L226 Difference]: Without dead ends: 4172 [2021-03-10 21:24:58,272 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 52.6ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:58,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4172 states. [2021-03-10 21:24:58,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4172 to 3828. [2021-03-10 21:24:58,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3827 states have (on average 2.9699503527567286) internal successors, (11366), 3827 states have internal predecessors, (11366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:58,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 11366 transitions. [2021-03-10 21:24:58,326 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 11366 transitions. Word has length 22 [2021-03-10 21:24:58,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:58,326 INFO L480 AbstractCegarLoop]: Abstraction has 3828 states and 11366 transitions. [2021-03-10 21:24:58,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:58,326 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 11366 transitions. [2021-03-10 21:24:58,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:24:58,329 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:58,329 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:58,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3220,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:58,530 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:58,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:58,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1843779970, now seen corresponding path program 212 times [2021-03-10 21:24:58,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:58,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649444410] [2021-03-10 21:24:58,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:58,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:58,590 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 20 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:58,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649444410] [2021-03-10 21:24:58,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613164040] [2021-03-10 21:24:58,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:58,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:24:58,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:58,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:24:58,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:58,646 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 25 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:58,646 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:58,646 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:24:58,646 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303645440] [2021-03-10 21:24:58,646 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:24:58,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:58,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:24:58,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:58,647 INFO L87 Difference]: Start difference. First operand 3828 states and 11366 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:58,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:58,810 INFO L93 Difference]: Finished difference Result 4046 states and 11697 transitions. [2021-03-10 21:24:58,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:24:58,811 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:24:58,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:58,815 INFO L225 Difference]: With dead ends: 4046 [2021-03-10 21:24:58,815 INFO L226 Difference]: Without dead ends: 4044 [2021-03-10 21:24:58,815 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 109.3ms TimeCoverageRelationStatistics Valid=195, Invalid=357, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:58,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4044 states. [2021-03-10 21:24:58,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4044 to 3828. [2021-03-10 21:24:58,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3828 states, 3827 states have (on average 2.969427750195976) internal successors, (11364), 3827 states have internal predecessors, (11364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:58,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3828 states to 3828 states and 11364 transitions. [2021-03-10 21:24:58,854 INFO L78 Accepts]: Start accepts. Automaton has 3828 states and 11364 transitions. Word has length 22 [2021-03-10 21:24:58,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:58,854 INFO L480 AbstractCegarLoop]: Abstraction has 3828 states and 11364 transitions. [2021-03-10 21:24:58,854 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:58,854 INFO L276 IsEmpty]: Start isEmpty. Operand 3828 states and 11364 transitions. [2021-03-10 21:24:58,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:24:58,857 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:58,857 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:59,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3221 [2021-03-10 21:24:59,058 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:59,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:59,058 INFO L82 PathProgramCache]: Analyzing trace with hash -678824319, now seen corresponding path program 213 times [2021-03-10 21:24:59,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:59,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454146250] [2021-03-10 21:24:59,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:59,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:59,115 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:59,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454146250] [2021-03-10 21:24:59,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779546253] [2021-03-10 21:24:59,115 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:59,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:24:59,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:59,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:24:59,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:59,181 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:59,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:59,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:24:59,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194278951] [2021-03-10 21:24:59,181 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:24:59,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:59,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:24:59,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:59,182 INFO L87 Difference]: Start difference. First operand 3828 states and 11364 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:59,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:59,272 INFO L93 Difference]: Finished difference Result 4424 states and 12469 transitions. [2021-03-10 21:24:59,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:24:59,272 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:24:59,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:59,276 INFO L225 Difference]: With dead ends: 4424 [2021-03-10 21:24:59,276 INFO L226 Difference]: Without dead ends: 4424 [2021-03-10 21:24:59,276 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:24:59,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4424 states. [2021-03-10 21:24:59,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4424 to 3838. [2021-03-10 21:24:59,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 2.9689861871253584) internal successors, (11392), 3837 states have internal predecessors, (11392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:59,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 11392 transitions. [2021-03-10 21:24:59,317 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 11392 transitions. Word has length 22 [2021-03-10 21:24:59,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:59,317 INFO L480 AbstractCegarLoop]: Abstraction has 3838 states and 11392 transitions. [2021-03-10 21:24:59,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:59,317 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 11392 transitions. [2021-03-10 21:24:59,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:24:59,321 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:59,321 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:24:59,521 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3222,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:59,521 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:24:59,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:24:59,521 INFO L82 PathProgramCache]: Analyzing trace with hash -961782330, now seen corresponding path program 214 times [2021-03-10 21:24:59,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:24:59,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162687803] [2021-03-10 21:24:59,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:24:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:24:59,586 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:59,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162687803] [2021-03-10 21:24:59,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382708132] [2021-03-10 21:24:59,586 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:24:59,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:24:59,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:24:59,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:24:59,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:24:59,642 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 27 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:24:59,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:24:59,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:24:59,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457180650] [2021-03-10 21:24:59,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:24:59,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:24:59,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:24:59,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:24:59,642 INFO L87 Difference]: Start difference. First operand 3838 states and 11392 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:59,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:24:59,786 INFO L93 Difference]: Finished difference Result 4109 states and 11999 transitions. [2021-03-10 21:24:59,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:24:59,787 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:24:59,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:24:59,790 INFO L225 Difference]: With dead ends: 4109 [2021-03-10 21:24:59,791 INFO L226 Difference]: Without dead ends: 4106 [2021-03-10 21:24:59,791 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 112.4ms TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:24:59,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2021-03-10 21:24:59,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 3841. [2021-03-10 21:24:59,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3841 states, 3840 states have (on average 2.968489583333333) internal successors, (11399), 3840 states have internal predecessors, (11399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:59,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3841 states to 3841 states and 11399 transitions. [2021-03-10 21:24:59,837 INFO L78 Accepts]: Start accepts. Automaton has 3841 states and 11399 transitions. Word has length 22 [2021-03-10 21:24:59,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:24:59,837 INFO L480 AbstractCegarLoop]: Abstraction has 3841 states and 11399 transitions. [2021-03-10 21:24:59,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:24:59,837 INFO L276 IsEmpty]: Start isEmpty. Operand 3841 states and 11399 transitions. [2021-03-10 21:24:59,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:24:59,840 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:24:59,840 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:00,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3223,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:00,041 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:00,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:00,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1555283175, now seen corresponding path program 215 times [2021-03-10 21:25:00,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:00,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440840345] [2021-03-10 21:25:00,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:00,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:00,101 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:00,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440840345] [2021-03-10 21:25:00,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872686783] [2021-03-10 21:25:00,101 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:00,122 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:25:00,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:00,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:00,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:00,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:00,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:25:00,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492103655] [2021-03-10 21:25:00,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:25:00,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:00,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:25:00,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:25:00,165 INFO L87 Difference]: Start difference. First operand 3841 states and 11399 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:00,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:00,274 INFO L93 Difference]: Finished difference Result 5862 states and 16951 transitions. [2021-03-10 21:25:00,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:25:00,275 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:00,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:00,281 INFO L225 Difference]: With dead ends: 5862 [2021-03-10 21:25:00,281 INFO L226 Difference]: Without dead ends: 5862 [2021-03-10 21:25:00,281 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:25:00,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5862 states. [2021-03-10 21:25:00,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5862 to 5031. [2021-03-10 21:25:00,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5031 states, 5030 states have (on average 3.0290258449304175) internal successors, (15236), 5030 states have internal predecessors, (15236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:00,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5031 states to 5031 states and 15236 transitions. [2021-03-10 21:25:00,342 INFO L78 Accepts]: Start accepts. Automaton has 5031 states and 15236 transitions. Word has length 22 [2021-03-10 21:25:00,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:00,342 INFO L480 AbstractCegarLoop]: Abstraction has 5031 states and 15236 transitions. [2021-03-10 21:25:00,342 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:00,342 INFO L276 IsEmpty]: Start isEmpty. Operand 5031 states and 15236 transitions. [2021-03-10 21:25:00,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:00,346 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:00,346 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:00,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3224,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:00,546 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:00,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:00,547 INFO L82 PathProgramCache]: Analyzing trace with hash -69053073, now seen corresponding path program 216 times [2021-03-10 21:25:00,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:00,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676024867] [2021-03-10 21:25:00,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:00,601 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:25:00,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676024867] [2021-03-10 21:25:00,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459534618] [2021-03-10 21:25:00,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:00,628 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:25:00,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:00,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:00,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:00,670 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 25 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:25:00,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:00,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:25:00,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208493207] [2021-03-10 21:25:00,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:25:00,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:00,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:25:00,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:25:00,672 INFO L87 Difference]: Start difference. First operand 5031 states and 15236 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:00,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:00,847 INFO L93 Difference]: Finished difference Result 5380 states and 15831 transitions. [2021-03-10 21:25:00,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:25:00,847 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:00,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:00,855 INFO L225 Difference]: With dead ends: 5380 [2021-03-10 21:25:00,855 INFO L226 Difference]: Without dead ends: 5376 [2021-03-10 21:25:00,855 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 112.3ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:25:00,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5376 states. [2021-03-10 21:25:00,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5376 to 5084. [2021-03-10 21:25:00,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5084 states, 5083 states have (on average 3.0334448160535117) internal successors, (15419), 5083 states have internal predecessors, (15419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:00,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5084 states to 5084 states and 15419 transitions. [2021-03-10 21:25:00,942 INFO L78 Accepts]: Start accepts. Automaton has 5084 states and 15419 transitions. Word has length 22 [2021-03-10 21:25:00,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:00,942 INFO L480 AbstractCegarLoop]: Abstraction has 5084 states and 15419 transitions. [2021-03-10 21:25:00,942 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:00,942 INFO L276 IsEmpty]: Start isEmpty. Operand 5084 states and 15419 transitions. [2021-03-10 21:25:00,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:00,948 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:00,948 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:01,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3225,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:01,169 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:01,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:01,169 INFO L82 PathProgramCache]: Analyzing trace with hash -175700274, now seen corresponding path program 217 times [2021-03-10 21:25:01,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:01,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261828399] [2021-03-10 21:25:01,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:01,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:01,257 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 18 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:01,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261828399] [2021-03-10 21:25:01,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045903893] [2021-03-10 21:25:01,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:01,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:01,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:01,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:01,320 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 22 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:01,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:01,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:25:01,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393020051] [2021-03-10 21:25:01,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:25:01,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:01,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:25:01,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:25:01,320 INFO L87 Difference]: Start difference. First operand 5084 states and 15419 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:01,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:01,481 INFO L93 Difference]: Finished difference Result 5286 states and 15759 transitions. [2021-03-10 21:25:01,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:25:01,482 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:01,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:01,487 INFO L225 Difference]: With dead ends: 5286 [2021-03-10 21:25:01,487 INFO L226 Difference]: Without dead ends: 5280 [2021-03-10 21:25:01,487 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 139.9ms TimeCoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:25:01,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5280 states. [2021-03-10 21:25:01,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5280 to 5075. [2021-03-10 21:25:01,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5075 states, 5074 states have (on average 3.034095388253843) internal successors, (15395), 5074 states have internal predecessors, (15395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:01,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5075 states to 5075 states and 15395 transitions. [2021-03-10 21:25:01,544 INFO L78 Accepts]: Start accepts. Automaton has 5075 states and 15395 transitions. Word has length 22 [2021-03-10 21:25:01,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:01,545 INFO L480 AbstractCegarLoop]: Abstraction has 5075 states and 15395 transitions. [2021-03-10 21:25:01,545 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:01,545 INFO L276 IsEmpty]: Start isEmpty. Operand 5075 states and 15395 transitions. [2021-03-10 21:25:01,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:01,549 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:01,549 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:01,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3226 [2021-03-10 21:25:01,749 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:01,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:01,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1953602065, now seen corresponding path program 218 times [2021-03-10 21:25:01,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:01,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480721601] [2021-03-10 21:25:01,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:01,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:01,810 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:01,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480721601] [2021-03-10 21:25:01,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883615034] [2021-03-10 21:25:01,810 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:01,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:25:01,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:01,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:01,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:01,872 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:01,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:01,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:25:01,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061483022] [2021-03-10 21:25:01,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:25:01,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:01,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:25:01,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:25:01,873 INFO L87 Difference]: Start difference. First operand 5075 states and 15395 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:01,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:01,978 INFO L93 Difference]: Finished difference Result 6136 states and 17834 transitions. [2021-03-10 21:25:01,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:25:01,979 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:01,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:01,986 INFO L225 Difference]: With dead ends: 6136 [2021-03-10 21:25:01,986 INFO L226 Difference]: Without dead ends: 6136 [2021-03-10 21:25:01,986 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 88.2ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:25:01,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6136 states. [2021-03-10 21:25:02,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6136 to 3901. [2021-03-10 21:25:02,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 2.9856410256410255) internal successors, (11644), 3900 states have internal predecessors, (11644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:02,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 11644 transitions. [2021-03-10 21:25:02,046 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 11644 transitions. Word has length 22 [2021-03-10 21:25:02,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:02,046 INFO L480 AbstractCegarLoop]: Abstraction has 3901 states and 11644 transitions. [2021-03-10 21:25:02,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:02,046 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 11644 transitions. [2021-03-10 21:25:02,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:02,049 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:02,049 INFO L519 BasicCegarLoop]: trace histogram [9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:02,250 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3227,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:02,250 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:02,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:02,250 INFO L82 PathProgramCache]: Analyzing trace with hash -1332552238, now seen corresponding path program 219 times [2021-03-10 21:25:02,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:02,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278869257] [2021-03-10 21:25:02,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:02,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:02,309 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 12 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:02,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278869257] [2021-03-10 21:25:02,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160868661] [2021-03-10 21:25:02,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:02,368 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:25:02,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:02,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-03-10 21:25:02,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:02,512 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 4 proven. 45 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-03-10 21:25:02,513 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:02,513 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-03-10 21:25:02,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697523127] [2021-03-10 21:25:02,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:25:02,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:02,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:25:02,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:25:02,513 INFO L87 Difference]: Start difference. First operand 3901 states and 11644 transitions. Second operand has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:03,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:03,734 INFO L93 Difference]: Finished difference Result 9069 states and 26193 transitions. [2021-03-10 21:25:03,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-03-10 21:25:03,735 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:03,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:03,746 INFO L225 Difference]: With dead ends: 9069 [2021-03-10 21:25:03,746 INFO L226 Difference]: Without dead ends: 9055 [2021-03-10 21:25:03,747 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3104 ImplicationChecksByTransitivity, 968.7ms TimeCoverageRelationStatistics Valid=1057, Invalid=8255, Unknown=0, NotChecked=0, Total=9312 [2021-03-10 21:25:03,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9055 states. [2021-03-10 21:25:03,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9055 to 5387. [2021-03-10 21:25:03,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5387 states, 5386 states have (on average 2.9433717044188636) internal successors, (15853), 5386 states have internal predecessors, (15853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:03,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5387 states to 5387 states and 15853 transitions. [2021-03-10 21:25:03,839 INFO L78 Accepts]: Start accepts. Automaton has 5387 states and 15853 transitions. Word has length 22 [2021-03-10 21:25:03,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:03,840 INFO L480 AbstractCegarLoop]: Abstraction has 5387 states and 15853 transitions. [2021-03-10 21:25:03,840 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.608695652173913) internal successors, (37), 22 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:03,840 INFO L276 IsEmpty]: Start isEmpty. Operand 5387 states and 15853 transitions. [2021-03-10 21:25:03,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:03,844 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:03,844 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:04,044 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3228,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:04,045 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:04,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:04,045 INFO L82 PathProgramCache]: Analyzing trace with hash -387790255, now seen corresponding path program 220 times [2021-03-10 21:25:04,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:04,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252449343] [2021-03-10 21:25:04,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:04,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:04,125 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 27 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:04,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252449343] [2021-03-10 21:25:04,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317713271] [2021-03-10 21:25:04,125 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:04,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:25:04,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:04,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:04,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:04,189 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:04,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:04,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:25:04,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077443300] [2021-03-10 21:25:04,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:25:04,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:04,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:25:04,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:25:04,190 INFO L87 Difference]: Start difference. First operand 5387 states and 15853 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:04,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:04,345 INFO L93 Difference]: Finished difference Result 5771 states and 16395 transitions. [2021-03-10 21:25:04,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:25:04,346 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:04,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:04,352 INFO L225 Difference]: With dead ends: 5771 [2021-03-10 21:25:04,352 INFO L226 Difference]: Without dead ends: 5767 [2021-03-10 21:25:04,352 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 133.5ms TimeCoverageRelationStatistics Valid=173, Invalid=289, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:25:04,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5767 states. [2021-03-10 21:25:04,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5767 to 5367. [2021-03-10 21:25:04,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5367 states, 5366 states have (on average 2.9403652627655608) internal successors, (15778), 5366 states have internal predecessors, (15778), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:04,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5367 states to 5367 states and 15778 transitions. [2021-03-10 21:25:04,427 INFO L78 Accepts]: Start accepts. Automaton has 5367 states and 15778 transitions. Word has length 22 [2021-03-10 21:25:04,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:04,427 INFO L480 AbstractCegarLoop]: Abstraction has 5367 states and 15778 transitions. [2021-03-10 21:25:04,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:04,427 INFO L276 IsEmpty]: Start isEmpty. Operand 5367 states and 15778 transitions. [2021-03-10 21:25:04,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:04,431 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:04,431 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:04,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3229 [2021-03-10 21:25:04,632 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:04,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:04,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1329958805, now seen corresponding path program 221 times [2021-03-10 21:25:04,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:04,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659473651] [2021-03-10 21:25:04,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:04,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:04,686 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:04,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659473651] [2021-03-10 21:25:04,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784539415] [2021-03-10 21:25:04,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:04,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:25:04,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:04,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:04,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:04,754 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:04,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:04,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:25:04,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248523464] [2021-03-10 21:25:04,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:25:04,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:04,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:25:04,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:25:04,755 INFO L87 Difference]: Start difference. First operand 5367 states and 15778 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:04,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:04,832 INFO L93 Difference]: Finished difference Result 5976 states and 16857 transitions. [2021-03-10 21:25:04,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:25:04,832 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:04,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:04,838 INFO L225 Difference]: With dead ends: 5976 [2021-03-10 21:25:04,838 INFO L226 Difference]: Without dead ends: 5976 [2021-03-10 21:25:04,838 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 59.4ms TimeCoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:04,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5976 states. [2021-03-10 21:25:04,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5976 to 5368. [2021-03-10 21:25:04,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5368 states, 5367 states have (on average 2.9381404881684365) internal successors, (15769), 5367 states have internal predecessors, (15769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:04,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5368 states to 5368 states and 15769 transitions. [2021-03-10 21:25:04,907 INFO L78 Accepts]: Start accepts. Automaton has 5368 states and 15769 transitions. Word has length 22 [2021-03-10 21:25:04,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:04,907 INFO L480 AbstractCegarLoop]: Abstraction has 5368 states and 15769 transitions. [2021-03-10 21:25:04,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:04,907 INFO L276 IsEmpty]: Start isEmpty. Operand 5368 states and 15769 transitions. [2021-03-10 21:25:04,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:04,912 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:04,912 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:05,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3230,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:05,112 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:05,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:05,112 INFO L82 PathProgramCache]: Analyzing trace with hash -399088529, now seen corresponding path program 222 times [2021-03-10 21:25:05,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:05,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665569022] [2021-03-10 21:25:05,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:05,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:05,164 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:05,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665569022] [2021-03-10 21:25:05,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801332679] [2021-03-10 21:25:05,165 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:05,185 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:25:05,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:05,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:05,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:05,233 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:05,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:05,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:25:05,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498351659] [2021-03-10 21:25:05,233 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:25:05,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:05,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:25:05,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:25:05,234 INFO L87 Difference]: Start difference. First operand 5368 states and 15769 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:05,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:05,311 INFO L93 Difference]: Finished difference Result 5731 states and 16223 transitions. [2021-03-10 21:25:05,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:25:05,311 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:05,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:05,316 INFO L225 Difference]: With dead ends: 5731 [2021-03-10 21:25:05,316 INFO L226 Difference]: Without dead ends: 5731 [2021-03-10 21:25:05,317 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:05,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5731 states. [2021-03-10 21:25:05,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5731 to 5320. [2021-03-10 21:25:05,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5320 states, 5319 states have (on average 2.9332581312276744) internal successors, (15602), 5319 states have internal predecessors, (15602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:05,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5320 states to 5320 states and 15602 transitions. [2021-03-10 21:25:05,376 INFO L78 Accepts]: Start accepts. Automaton has 5320 states and 15602 transitions. Word has length 22 [2021-03-10 21:25:05,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:05,376 INFO L480 AbstractCegarLoop]: Abstraction has 5320 states and 15602 transitions. [2021-03-10 21:25:05,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:05,376 INFO L276 IsEmpty]: Start isEmpty. Operand 5320 states and 15602 transitions. [2021-03-10 21:25:05,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:05,381 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:05,381 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:05,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3231 [2021-03-10 21:25:05,581 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:05,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:05,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1835018965, now seen corresponding path program 223 times [2021-03-10 21:25:05,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:05,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412632757] [2021-03-10 21:25:05,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:05,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:05,641 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:05,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412632757] [2021-03-10 21:25:05,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165308373] [2021-03-10 21:25:05,641 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:05,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:05,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:05,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:05,708 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:05,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:05,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:25:05,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91334544] [2021-03-10 21:25:05,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:05,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:05,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:05,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:05,709 INFO L87 Difference]: Start difference. First operand 5320 states and 15602 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:05,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:05,819 INFO L93 Difference]: Finished difference Result 6238 states and 17516 transitions. [2021-03-10 21:25:05,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:25:05,819 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:05,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:05,825 INFO L225 Difference]: With dead ends: 6238 [2021-03-10 21:25:05,825 INFO L226 Difference]: Without dead ends: 6238 [2021-03-10 21:25:05,826 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 89.0ms TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:25:05,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6238 states. [2021-03-10 21:25:05,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6238 to 5233. [2021-03-10 21:25:05,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5233 states, 5232 states have (on average 2.922400611620795) internal successors, (15290), 5232 states have internal predecessors, (15290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:05,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5233 states to 5233 states and 15290 transitions. [2021-03-10 21:25:05,886 INFO L78 Accepts]: Start accepts. Automaton has 5233 states and 15290 transitions. Word has length 22 [2021-03-10 21:25:05,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:05,886 INFO L480 AbstractCegarLoop]: Abstraction has 5233 states and 15290 transitions. [2021-03-10 21:25:05,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:05,886 INFO L276 IsEmpty]: Start isEmpty. Operand 5233 states and 15290 transitions. [2021-03-10 21:25:05,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:05,890 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:05,891 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:06,091 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3232 [2021-03-10 21:25:06,091 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:06,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:06,091 INFO L82 PathProgramCache]: Analyzing trace with hash -1922092753, now seen corresponding path program 224 times [2021-03-10 21:25:06,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:06,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016674623] [2021-03-10 21:25:06,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:06,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:06,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016674623] [2021-03-10 21:25:06,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686543025] [2021-03-10 21:25:06,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:06,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:25:06,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:06,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:06,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:06,223 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:06,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:06,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:25:06,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857196969] [2021-03-10 21:25:06,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:06,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:06,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:06,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:06,224 INFO L87 Difference]: Start difference. First operand 5233 states and 15290 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:06,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:06,384 INFO L93 Difference]: Finished difference Result 8227 states and 23267 transitions. [2021-03-10 21:25:06,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:25:06,385 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:06,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:06,395 INFO L225 Difference]: With dead ends: 8227 [2021-03-10 21:25:06,395 INFO L226 Difference]: Without dead ends: 8227 [2021-03-10 21:25:06,395 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 120.6ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:25:06,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8227 states. [2021-03-10 21:25:06,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8227 to 6539. [2021-03-10 21:25:06,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6539 states, 6538 states have (on average 2.962220862649128) internal successors, (19367), 6538 states have internal predecessors, (19367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:06,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6539 states to 6539 states and 19367 transitions. [2021-03-10 21:25:06,483 INFO L78 Accepts]: Start accepts. Automaton has 6539 states and 19367 transitions. Word has length 22 [2021-03-10 21:25:06,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:06,483 INFO L480 AbstractCegarLoop]: Abstraction has 6539 states and 19367 transitions. [2021-03-10 21:25:06,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:06,483 INFO L276 IsEmpty]: Start isEmpty. Operand 6539 states and 19367 transitions. [2021-03-10 21:25:06,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:06,489 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:06,489 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:06,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3233,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:06,689 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:06,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:06,690 INFO L82 PathProgramCache]: Analyzing trace with hash 971614503, now seen corresponding path program 225 times [2021-03-10 21:25:06,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:06,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674764434] [2021-03-10 21:25:06,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:06,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:06,753 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:06,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674764434] [2021-03-10 21:25:06,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1714293723] [2021-03-10 21:25:06,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:06,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:25:06,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:06,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:06,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:06,818 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:06,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:06,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:25:06,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554415170] [2021-03-10 21:25:06,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:06,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:06,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:06,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:06,819 INFO L87 Difference]: Start difference. First operand 6539 states and 19367 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:06,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:06,966 INFO L93 Difference]: Finished difference Result 8105 states and 23072 transitions. [2021-03-10 21:25:06,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:25:06,966 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:06,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:06,974 INFO L225 Difference]: With dead ends: 8105 [2021-03-10 21:25:06,975 INFO L226 Difference]: Without dead ends: 8105 [2021-03-10 21:25:06,975 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 115.4ms TimeCoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:25:06,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8105 states. [2021-03-10 21:25:07,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8105 to 5159. [2021-03-10 21:25:07,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5159 states, 5158 states have (on average 2.929042264443583) internal successors, (15108), 5158 states have internal predecessors, (15108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:07,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5159 states to 5159 states and 15108 transitions. [2021-03-10 21:25:07,068 INFO L78 Accepts]: Start accepts. Automaton has 5159 states and 15108 transitions. Word has length 22 [2021-03-10 21:25:07,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:07,068 INFO L480 AbstractCegarLoop]: Abstraction has 5159 states and 15108 transitions. [2021-03-10 21:25:07,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:07,068 INFO L276 IsEmpty]: Start isEmpty. Operand 5159 states and 15108 transitions. [2021-03-10 21:25:07,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:07,072 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:07,072 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:07,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3234,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:07,273 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:07,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:07,273 INFO L82 PathProgramCache]: Analyzing trace with hash -305915357, now seen corresponding path program 226 times [2021-03-10 21:25:07,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:07,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731144642] [2021-03-10 21:25:07,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:07,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:07,323 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:07,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731144642] [2021-03-10 21:25:07,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127108015] [2021-03-10 21:25:07,323 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:07,341 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:25:07,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:07,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:07,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:07,379 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:07,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:07,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:25:07,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75018827] [2021-03-10 21:25:07,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:25:07,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:07,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:25:07,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:25:07,380 INFO L87 Difference]: Start difference. First operand 5159 states and 15108 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:07,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:07,520 INFO L93 Difference]: Finished difference Result 5517 states and 15611 transitions. [2021-03-10 21:25:07,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:25:07,521 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:07,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:07,526 INFO L225 Difference]: With dead ends: 5517 [2021-03-10 21:25:07,526 INFO L226 Difference]: Without dead ends: 5513 [2021-03-10 21:25:07,526 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 98.4ms TimeCoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:25:07,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5513 states. [2021-03-10 21:25:07,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5513 to 5171. [2021-03-10 21:25:07,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5171 states, 5170 states have (on average 2.927852998065764) internal successors, (15137), 5170 states have internal predecessors, (15137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:07,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5171 states to 5171 states and 15137 transitions. [2021-03-10 21:25:07,588 INFO L78 Accepts]: Start accepts. Automaton has 5171 states and 15137 transitions. Word has length 22 [2021-03-10 21:25:07,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:07,588 INFO L480 AbstractCegarLoop]: Abstraction has 5171 states and 15137 transitions. [2021-03-10 21:25:07,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:07,588 INFO L276 IsEmpty]: Start isEmpty. Operand 5171 states and 15137 transitions. [2021-03-10 21:25:07,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:07,592 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:07,592 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:07,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3235,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:07,793 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:07,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:07,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1411833703, now seen corresponding path program 227 times [2021-03-10 21:25:07,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:07,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22699548] [2021-03-10 21:25:07,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:07,841 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:07,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22699548] [2021-03-10 21:25:07,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625725731] [2021-03-10 21:25:07,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:07,862 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:25:07,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:07,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:07,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:07,904 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 29 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:07,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:07,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:25:07,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666050058] [2021-03-10 21:25:07,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:25:07,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:07,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:25:07,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:25:07,905 INFO L87 Difference]: Start difference. First operand 5171 states and 15137 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:07,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:07,983 INFO L93 Difference]: Finished difference Result 5892 states and 16526 transitions. [2021-03-10 21:25:07,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:25:07,983 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:07,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:07,988 INFO L225 Difference]: With dead ends: 5892 [2021-03-10 21:25:07,989 INFO L226 Difference]: Without dead ends: 5892 [2021-03-10 21:25:07,989 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=100, Invalid=140, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:07,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5892 states. [2021-03-10 21:25:08,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5892 to 5183. [2021-03-10 21:25:08,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5183 states, 5182 states have (on average 2.9260903126206097) internal successors, (15163), 5182 states have internal predecessors, (15163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:08,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5183 states to 5183 states and 15163 transitions. [2021-03-10 21:25:08,046 INFO L78 Accepts]: Start accepts. Automaton has 5183 states and 15163 transitions. Word has length 22 [2021-03-10 21:25:08,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:08,047 INFO L480 AbstractCegarLoop]: Abstraction has 5183 states and 15163 transitions. [2021-03-10 21:25:08,047 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:08,047 INFO L276 IsEmpty]: Start isEmpty. Operand 5183 states and 15163 transitions. [2021-03-10 21:25:08,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:08,051 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:08,051 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:08,251 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3236,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:08,251 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:08,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:08,252 INFO L82 PathProgramCache]: Analyzing trace with hash -317213631, now seen corresponding path program 228 times [2021-03-10 21:25:08,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:08,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639932233] [2021-03-10 21:25:08,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:08,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:08,305 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:08,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639932233] [2021-03-10 21:25:08,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477516940] [2021-03-10 21:25:08,305 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:08,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:25:08,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:08,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:08,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:08,368 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 26 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:08,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:08,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:25:08,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476575469] [2021-03-10 21:25:08,368 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:25:08,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:08,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:25:08,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:25:08,368 INFO L87 Difference]: Start difference. First operand 5183 states and 15163 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:08,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:08,458 INFO L93 Difference]: Finished difference Result 5922 states and 16620 transitions. [2021-03-10 21:25:08,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:25:08,458 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:08,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:08,463 INFO L225 Difference]: With dead ends: 5922 [2021-03-10 21:25:08,464 INFO L226 Difference]: Without dead ends: 5922 [2021-03-10 21:25:08,464 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 70.8ms TimeCoverageRelationStatistics Valid=119, Invalid=187, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:25:08,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5922 states. [2021-03-10 21:25:08,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5922 to 5178. [2021-03-10 21:25:08,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5178 states, 5177 states have (on average 2.924666795441375) internal successors, (15141), 5177 states have internal predecessors, (15141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:08,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5178 states to 5178 states and 15141 transitions. [2021-03-10 21:25:08,526 INFO L78 Accepts]: Start accepts. Automaton has 5178 states and 15141 transitions. Word has length 22 [2021-03-10 21:25:08,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:08,526 INFO L480 AbstractCegarLoop]: Abstraction has 5178 states and 15141 transitions. [2021-03-10 21:25:08,526 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:08,526 INFO L276 IsEmpty]: Start isEmpty. Operand 5178 states and 15141 transitions. [2021-03-10 21:25:08,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:08,531 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:08,531 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:08,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3237,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:08,731 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:08,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:08,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1916893863, now seen corresponding path program 229 times [2021-03-10 21:25:08,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:08,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608720491] [2021-03-10 21:25:08,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:08,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:08,787 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:08,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608720491] [2021-03-10 21:25:08,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143842854] [2021-03-10 21:25:08,787 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:08,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:08,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:08,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:08,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:08,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:25:08,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452794156] [2021-03-10 21:25:08,847 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:25:08,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:08,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:25:08,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:25:08,848 INFO L87 Difference]: Start difference. First operand 5178 states and 15141 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:08,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:08,931 INFO L93 Difference]: Finished difference Result 8667 states and 25108 transitions. [2021-03-10 21:25:08,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:25:08,932 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:08,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:08,940 INFO L225 Difference]: With dead ends: 8667 [2021-03-10 21:25:08,940 INFO L226 Difference]: Without dead ends: 8667 [2021-03-10 21:25:08,940 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 67.4ms TimeCoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:25:08,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8667 states. [2021-03-10 21:25:09,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8667 to 8167. [2021-03-10 21:25:09,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8167 states, 8166 states have (on average 2.984570168993387) internal successors, (24372), 8166 states have internal predecessors, (24372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:09,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8167 states to 8167 states and 24372 transitions. [2021-03-10 21:25:09,050 INFO L78 Accepts]: Start accepts. Automaton has 8167 states and 24372 transitions. Word has length 22 [2021-03-10 21:25:09,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:09,050 INFO L480 AbstractCegarLoop]: Abstraction has 8167 states and 24372 transitions. [2021-03-10 21:25:09,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:09,050 INFO L276 IsEmpty]: Start isEmpty. Operand 8167 states and 24372 transitions. [2021-03-10 21:25:09,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:09,058 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:09,058 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:09,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3238 [2021-03-10 21:25:09,259 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:09,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:09,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1840217855, now seen corresponding path program 230 times [2021-03-10 21:25:09,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:09,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976341015] [2021-03-10 21:25:09,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:09,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:09,323 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:09,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976341015] [2021-03-10 21:25:09,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395143195] [2021-03-10 21:25:09,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:09,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:25:09,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:09,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:09,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:09,387 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:09,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:09,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:25:09,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120052116] [2021-03-10 21:25:09,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:09,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:09,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:09,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:09,388 INFO L87 Difference]: Start difference. First operand 8167 states and 24372 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:09,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:09,520 INFO L93 Difference]: Finished difference Result 9066 states and 26143 transitions. [2021-03-10 21:25:09,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:25:09,521 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:09,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:09,531 INFO L225 Difference]: With dead ends: 9066 [2021-03-10 21:25:09,531 INFO L226 Difference]: Without dead ends: 9066 [2021-03-10 21:25:09,531 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=164, Invalid=298, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:25:09,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9066 states. [2021-03-10 21:25:09,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9066 to 8041. [2021-03-10 21:25:09,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8041 states, 8040 states have (on average 2.981218905472637) internal successors, (23969), 8040 states have internal predecessors, (23969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:09,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8041 states to 8041 states and 23969 transitions. [2021-03-10 21:25:09,632 INFO L78 Accepts]: Start accepts. Automaton has 8041 states and 23969 transitions. Word has length 22 [2021-03-10 21:25:09,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:09,632 INFO L480 AbstractCegarLoop]: Abstraction has 8041 states and 23969 transitions. [2021-03-10 21:25:09,632 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:09,632 INFO L276 IsEmpty]: Start isEmpty. Operand 8041 states and 23969 transitions. [2021-03-10 21:25:09,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:09,639 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:09,639 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:09,839 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3239,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:09,840 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:09,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:09,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1948403175, now seen corresponding path program 231 times [2021-03-10 21:25:09,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:09,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587672600] [2021-03-10 21:25:09,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:09,909 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:09,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587672600] [2021-03-10 21:25:09,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257721099] [2021-03-10 21:25:09,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:09,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:25:09,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:09,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:09,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:10,023 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:10,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:10,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:25:10,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671138057] [2021-03-10 21:25:10,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:10,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:10,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:10,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:10,023 INFO L87 Difference]: Start difference. First operand 8041 states and 23969 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:10,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:10,211 INFO L93 Difference]: Finished difference Result 12727 states and 37454 transitions. [2021-03-10 21:25:10,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:25:10,212 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:10,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:10,227 INFO L225 Difference]: With dead ends: 12727 [2021-03-10 21:25:10,227 INFO L226 Difference]: Without dead ends: 12727 [2021-03-10 21:25:10,227 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 152.4ms TimeCoverageRelationStatistics Valid=264, Invalid=492, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:25:10,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12727 states. [2021-03-10 21:25:10,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12727 to 11269. [2021-03-10 21:25:10,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11269 states, 11268 states have (on average 3.0277777777777777) internal successors, (34117), 11268 states have internal predecessors, (34117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:10,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11269 states to 11269 states and 34117 transitions. [2021-03-10 21:25:10,391 INFO L78 Accepts]: Start accepts. Automaton has 11269 states and 34117 transitions. Word has length 22 [2021-03-10 21:25:10,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:10,391 INFO L480 AbstractCegarLoop]: Abstraction has 11269 states and 34117 transitions. [2021-03-10 21:25:10,391 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:10,391 INFO L276 IsEmpty]: Start isEmpty. Operand 11269 states and 34117 transitions. [2021-03-10 21:25:10,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:10,401 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:10,401 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:10,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3240 [2021-03-10 21:25:10,601 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:10,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:10,601 INFO L82 PathProgramCache]: Analyzing trace with hash 2063972437, now seen corresponding path program 232 times [2021-03-10 21:25:10,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:10,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776108933] [2021-03-10 21:25:10,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:10,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:10,657 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:10,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776108933] [2021-03-10 21:25:10,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612390590] [2021-03-10 21:25:10,658 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:10,677 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:25:10,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:10,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:10,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:10,719 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:10,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:10,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:25:10,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999669856] [2021-03-10 21:25:10,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:25:10,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:10,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:25:10,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:25:10,720 INFO L87 Difference]: Start difference. First operand 11269 states and 34117 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:10,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:10,814 INFO L93 Difference]: Finished difference Result 11783 states and 35094 transitions. [2021-03-10 21:25:10,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:25:10,815 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:10,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:10,831 INFO L225 Difference]: With dead ends: 11783 [2021-03-10 21:25:10,831 INFO L226 Difference]: Without dead ends: 11783 [2021-03-10 21:25:10,831 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:25:10,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11783 states. [2021-03-10 21:25:10,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11783 to 11255. [2021-03-10 21:25:10,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11255 states, 11254 states have (on average 3.027368046916652) internal successors, (34070), 11254 states have internal predecessors, (34070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:10,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11255 states to 11255 states and 34070 transitions. [2021-03-10 21:25:10,983 INFO L78 Accepts]: Start accepts. Automaton has 11255 states and 34070 transitions. Word has length 22 [2021-03-10 21:25:10,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:10,983 INFO L480 AbstractCegarLoop]: Abstraction has 11255 states and 34070 transitions. [2021-03-10 21:25:10,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:10,983 INFO L276 IsEmpty]: Start isEmpty. Operand 11255 states and 34070 transitions. [2021-03-10 21:25:10,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:10,993 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:10,993 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:11,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3241 [2021-03-10 21:25:11,193 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:11,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:11,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1693139281, now seen corresponding path program 233 times [2021-03-10 21:25:11,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:11,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322911607] [2021-03-10 21:25:11,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:11,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:11,259 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:11,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322911607] [2021-03-10 21:25:11,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151033337] [2021-03-10 21:25:11,259 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:11,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:25:11,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:11,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:11,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:11,323 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:11,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:11,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:25:11,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537704261] [2021-03-10 21:25:11,324 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:11,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:11,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:11,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:11,324 INFO L87 Difference]: Start difference. First operand 11255 states and 34070 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:11,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:11,468 INFO L93 Difference]: Finished difference Result 12824 states and 38032 transitions. [2021-03-10 21:25:11,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:25:11,469 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:11,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:11,485 INFO L225 Difference]: With dead ends: 12824 [2021-03-10 21:25:11,485 INFO L226 Difference]: Without dead ends: 12824 [2021-03-10 21:25:11,485 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=163, Invalid=299, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:25:11,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12824 states. [2021-03-10 21:25:11,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12824 to 7201. [2021-03-10 21:25:11,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7201 states, 7200 states have (on average 2.9608333333333334) internal successors, (21318), 7200 states have internal predecessors, (21318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:11,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7201 states to 7201 states and 21318 transitions. [2021-03-10 21:25:11,624 INFO L78 Accepts]: Start accepts. Automaton has 7201 states and 21318 transitions. Word has length 22 [2021-03-10 21:25:11,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:11,624 INFO L480 AbstractCegarLoop]: Abstraction has 7201 states and 21318 transitions. [2021-03-10 21:25:11,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:11,624 INFO L276 IsEmpty]: Start isEmpty. Operand 7201 states and 21318 transitions. [2021-03-10 21:25:11,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:11,630 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:11,630 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:11,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3242 [2021-03-10 21:25:11,835 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:11,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:11,835 INFO L82 PathProgramCache]: Analyzing trace with hash 2095481749, now seen corresponding path program 234 times [2021-03-10 21:25:11,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:11,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262356772] [2021-03-10 21:25:11,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:11,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:11,902 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:11,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262356772] [2021-03-10 21:25:11,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113267752] [2021-03-10 21:25:11,903 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:11,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:25:11,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:11,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:11,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:11,965 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:11,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:11,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:25:11,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504973367] [2021-03-10 21:25:11,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:11,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:11,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:11,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:11,966 INFO L87 Difference]: Start difference. First operand 7201 states and 21318 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:12,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:12,173 INFO L93 Difference]: Finished difference Result 10561 states and 30382 transitions. [2021-03-10 21:25:12,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:25:12,173 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:12,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:12,185 INFO L225 Difference]: With dead ends: 10561 [2021-03-10 21:25:12,185 INFO L226 Difference]: Without dead ends: 10561 [2021-03-10 21:25:12,185 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 151.0ms TimeCoverageRelationStatistics Valid=263, Invalid=493, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:25:12,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10561 states. [2021-03-10 21:25:12,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10561 to 6109. [2021-03-10 21:25:12,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6109 states, 6108 states have (on average 2.947282252783235) internal successors, (18002), 6108 states have internal predecessors, (18002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:12,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6109 states to 6109 states and 18002 transitions. [2021-03-10 21:25:12,307 INFO L78 Accepts]: Start accepts. Automaton has 6109 states and 18002 transitions. Word has length 22 [2021-03-10 21:25:12,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:12,307 INFO L480 AbstractCegarLoop]: Abstraction has 6109 states and 18002 transitions. [2021-03-10 21:25:12,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:12,307 INFO L276 IsEmpty]: Start isEmpty. Operand 6109 states and 18002 transitions. [2021-03-10 21:25:12,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:12,312 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:12,312 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:12,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3243 [2021-03-10 21:25:12,513 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:12,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:12,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1959701393, now seen corresponding path program 235 times [2021-03-10 21:25:12,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:12,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137554995] [2021-03-10 21:25:12,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:12,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:12,559 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:25:12,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137554995] [2021-03-10 21:25:12,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945403718] [2021-03-10 21:25:12,560 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:12,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:12,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:12,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:12,636 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:25:12,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:12,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-03-10 21:25:12,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837560646] [2021-03-10 21:25:12,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:25:12,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:12,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:25:12,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:25:12,637 INFO L87 Difference]: Start difference. First operand 6109 states and 18002 transitions. Second operand has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:12,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:12,787 INFO L93 Difference]: Finished difference Result 6375 states and 18328 transitions. [2021-03-10 21:25:12,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:25:12,787 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:12,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:12,794 INFO L225 Difference]: With dead ends: 6375 [2021-03-10 21:25:12,794 INFO L226 Difference]: Without dead ends: 6371 [2021-03-10 21:25:12,794 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 92.8ms TimeCoverageRelationStatistics Valid=147, Invalid=273, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:25:12,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6371 states. [2021-03-10 21:25:12,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6371 to 6109. [2021-03-10 21:25:12,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6109 states, 6108 states have (on average 2.9466273739358217) internal successors, (17998), 6108 states have internal predecessors, (17998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:12,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6109 states to 6109 states and 17998 transitions. [2021-03-10 21:25:12,862 INFO L78 Accepts]: Start accepts. Automaton has 6109 states and 17998 transitions. Word has length 22 [2021-03-10 21:25:12,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:12,862 INFO L480 AbstractCegarLoop]: Abstraction has 6109 states and 17998 transitions. [2021-03-10 21:25:12,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 11 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:12,863 INFO L276 IsEmpty]: Start isEmpty. Operand 6109 states and 17998 transitions. [2021-03-10 21:25:12,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:12,868 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:12,868 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:13,068 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3244,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:13,068 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:13,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:13,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1459014895, now seen corresponding path program 236 times [2021-03-10 21:25:13,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:13,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751087288] [2021-03-10 21:25:13,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:13,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751087288] [2021-03-10 21:25:13,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366716294] [2021-03-10 21:25:13,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:13,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:25:13,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:13,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:13,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:13,206 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:13,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:13,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:25:13,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866522859] [2021-03-10 21:25:13,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:13,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:13,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:13,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:13,207 INFO L87 Difference]: Start difference. First operand 6109 states and 17998 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:13,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:13,382 INFO L93 Difference]: Finished difference Result 7567 states and 21448 transitions. [2021-03-10 21:25:13,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:25:13,382 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:13,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:13,391 INFO L225 Difference]: With dead ends: 7567 [2021-03-10 21:25:13,391 INFO L226 Difference]: Without dead ends: 7567 [2021-03-10 21:25:13,391 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 151.0ms TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:25:13,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7567 states. [2021-03-10 21:25:13,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7567 to 4949. [2021-03-10 21:25:13,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4949 states, 4948 states have (on average 2.927445432497979) internal successors, (14485), 4948 states have internal predecessors, (14485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:13,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4949 states to 4949 states and 14485 transitions. [2021-03-10 21:25:13,466 INFO L78 Accepts]: Start accepts. Automaton has 4949 states and 14485 transitions. Word has length 22 [2021-03-10 21:25:13,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:13,466 INFO L480 AbstractCegarLoop]: Abstraction has 4949 states and 14485 transitions. [2021-03-10 21:25:13,466 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:13,466 INFO L276 IsEmpty]: Start isEmpty. Operand 4949 states and 14485 transitions. [2021-03-10 21:25:13,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:13,470 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:13,470 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:13,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3245,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:13,670 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:13,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:13,670 INFO L82 PathProgramCache]: Analyzing trace with hash -2062760815, now seen corresponding path program 237 times [2021-03-10 21:25:13,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:13,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104409013] [2021-03-10 21:25:13,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:13,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:13,719 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:13,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104409013] [2021-03-10 21:25:13,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902546188] [2021-03-10 21:25:13,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:13,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:25:13,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:13,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:13,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:13,780 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:13,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:13,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:25:13,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206915890] [2021-03-10 21:25:13,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:25:13,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:13,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:25:13,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:25:13,781 INFO L87 Difference]: Start difference. First operand 4949 states and 14485 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:13,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:13,922 INFO L93 Difference]: Finished difference Result 5274 states and 14931 transitions. [2021-03-10 21:25:13,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:25:13,922 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:13,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:13,928 INFO L225 Difference]: With dead ends: 5274 [2021-03-10 21:25:13,928 INFO L226 Difference]: Without dead ends: 5270 [2021-03-10 21:25:13,928 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:25:13,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5270 states. [2021-03-10 21:25:13,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5270 to 4961. [2021-03-10 21:25:13,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4961 states, 4960 states have (on average 2.926209677419355) internal successors, (14514), 4960 states have internal predecessors, (14514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:13,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4961 states to 4961 states and 14514 transitions. [2021-03-10 21:25:13,984 INFO L78 Accepts]: Start accepts. Automaton has 4961 states and 14514 transitions. Word has length 22 [2021-03-10 21:25:13,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:13,984 INFO L480 AbstractCegarLoop]: Abstraction has 4961 states and 14514 transitions. [2021-03-10 21:25:13,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:13,984 INFO L276 IsEmpty]: Start isEmpty. Operand 4961 states and 14514 transitions. [2021-03-10 21:25:13,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:13,988 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:13,988 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:14,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3246,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:14,189 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:14,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:14,189 INFO L82 PathProgramCache]: Analyzing trace with hash -345011755, now seen corresponding path program 238 times [2021-03-10 21:25:14,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:14,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939901245] [2021-03-10 21:25:14,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:14,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:14,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939901245] [2021-03-10 21:25:14,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060401729] [2021-03-10 21:25:14,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:14,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:25:14,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:14,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:14,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 28 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:14,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:14,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:25:14,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536760403] [2021-03-10 21:25:14,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:25:14,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:14,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:25:14,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:25:14,320 INFO L87 Difference]: Start difference. First operand 4961 states and 14514 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:14,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:14,412 INFO L93 Difference]: Finished difference Result 5690 states and 15948 transitions. [2021-03-10 21:25:14,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:25:14,412 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:14,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:14,418 INFO L225 Difference]: With dead ends: 5690 [2021-03-10 21:25:14,418 INFO L226 Difference]: Without dead ends: 5690 [2021-03-10 21:25:14,418 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=111, Invalid=161, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:25:14,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5690 states. [2021-03-10 21:25:14,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5690 to 4969. [2021-03-10 21:25:14,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4969 states, 4968 states have (on average 2.9253220611916264) internal successors, (14533), 4968 states have internal predecessors, (14533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:14,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4969 states to 4969 states and 14533 transitions. [2021-03-10 21:25:14,475 INFO L78 Accepts]: Start accepts. Automaton has 4969 states and 14533 transitions. Word has length 22 [2021-03-10 21:25:14,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:14,475 INFO L480 AbstractCegarLoop]: Abstraction has 4969 states and 14533 transitions. [2021-03-10 21:25:14,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:14,475 INFO L276 IsEmpty]: Start isEmpty. Operand 4969 states and 14533 transitions. [2021-03-10 21:25:14,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:14,479 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:14,479 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:14,680 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3247 [2021-03-10 21:25:14,680 INFO L428 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:14,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:14,680 INFO L82 PathProgramCache]: Analyzing trace with hash -2074059089, now seen corresponding path program 239 times [2021-03-10 21:25:14,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:14,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081330891] [2021-03-10 21:25:14,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:14,731 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:14,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081330891] [2021-03-10 21:25:14,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248472805] [2021-03-10 21:25:14,732 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:14,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:25:14,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:14,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:14,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:14,801 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:14,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:14,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:25:14,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900561477] [2021-03-10 21:25:14,803 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:25:14,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:14,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:25:14,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:25:14,803 INFO L87 Difference]: Start difference. First operand 4969 states and 14533 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:14,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:14,933 INFO L93 Difference]: Finished difference Result 5878 states and 16463 transitions. [2021-03-10 21:25:14,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:25:14,933 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:14,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:14,939 INFO L225 Difference]: With dead ends: 5878 [2021-03-10 21:25:14,939 INFO L226 Difference]: Without dead ends: 5878 [2021-03-10 21:25:14,939 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 86.8ms TimeCoverageRelationStatistics Valid=146, Invalid=234, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:25:14,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5878 states. [2021-03-10 21:25:14,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5878 to 4973. [2021-03-10 21:25:14,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4973 states, 4972 states have (on average 2.924979887369268) internal successors, (14543), 4972 states have internal predecessors, (14543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:14,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4973 states to 4973 states and 14543 transitions. [2021-03-10 21:25:14,998 INFO L78 Accepts]: Start accepts. Automaton has 4973 states and 14543 transitions. Word has length 22 [2021-03-10 21:25:14,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:14,998 INFO L480 AbstractCegarLoop]: Abstraction has 4973 states and 14543 transitions. [2021-03-10 21:25:14,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:14,998 INFO L276 IsEmpty]: Start isEmpty. Operand 4973 states and 14543 transitions. [2021-03-10 21:25:15,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:15,002 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:15,002 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:15,202 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3248,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:15,203 INFO L428 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:15,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:15,203 INFO L82 PathProgramCache]: Analyzing trace with hash 160048405, now seen corresponding path program 240 times [2021-03-10 21:25:15,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:15,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607899771] [2021-03-10 21:25:15,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:15,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:15,262 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:15,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607899771] [2021-03-10 21:25:15,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625979615] [2021-03-10 21:25:15,262 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:15,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:25:15,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:15,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:15,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:15,339 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:15,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:15,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:25:15,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608574478] [2021-03-10 21:25:15,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:15,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:15,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:15,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:15,340 INFO L87 Difference]: Start difference. First operand 4973 states and 14543 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:15,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:15,471 INFO L93 Difference]: Finished difference Result 5765 states and 16200 transitions. [2021-03-10 21:25:15,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:25:15,472 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:15,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:15,477 INFO L225 Difference]: With dead ends: 5765 [2021-03-10 21:25:15,477 INFO L226 Difference]: Without dead ends: 5765 [2021-03-10 21:25:15,477 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=154, Invalid=266, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:25:15,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5765 states. [2021-03-10 21:25:15,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5765 to 4919. [2021-03-10 21:25:15,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4919 states, 4918 states have (on average 2.9217161447742983) internal successors, (14369), 4918 states have internal predecessors, (14369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:15,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4919 states to 4919 states and 14369 transitions. [2021-03-10 21:25:15,527 INFO L78 Accepts]: Start accepts. Automaton has 4919 states and 14369 transitions. Word has length 22 [2021-03-10 21:25:15,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:15,528 INFO L480 AbstractCegarLoop]: Abstraction has 4919 states and 14369 transitions. [2021-03-10 21:25:15,528 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:15,528 INFO L276 IsEmpty]: Start isEmpty. Operand 4919 states and 14369 transitions. [2021-03-10 21:25:15,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:15,532 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:15,532 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:15,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3249,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:15,732 INFO L428 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:15,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:15,732 INFO L82 PathProgramCache]: Analyzing trace with hash 697903983, now seen corresponding path program 241 times [2021-03-10 21:25:15,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:15,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504267612] [2021-03-10 21:25:15,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:15,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:15,793 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:15,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504267612] [2021-03-10 21:25:15,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369452726] [2021-03-10 21:25:15,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:15,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:15,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:15,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:15,883 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:15,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:15,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:25:15,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157783380] [2021-03-10 21:25:15,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:15,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:15,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:15,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:15,884 INFO L87 Difference]: Start difference. First operand 4919 states and 14369 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:15,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:16,000 INFO L93 Difference]: Finished difference Result 8014 states and 23033 transitions. [2021-03-10 21:25:16,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:25:16,000 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:16,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:16,011 INFO L225 Difference]: With dead ends: 8014 [2021-03-10 21:25:16,011 INFO L226 Difference]: Without dead ends: 8014 [2021-03-10 21:25:16,011 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 91.9ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:25:16,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8014 states. [2021-03-10 21:25:16,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8014 to 7160. [2021-03-10 21:25:16,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7160 states, 7159 states have (on average 2.966894817711971) internal successors, (21240), 7159 states have internal predecessors, (21240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:16,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7160 states to 7160 states and 21240 transitions. [2021-03-10 21:25:16,108 INFO L78 Accepts]: Start accepts. Automaton has 7160 states and 21240 transitions. Word has length 22 [2021-03-10 21:25:16,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:16,108 INFO L480 AbstractCegarLoop]: Abstraction has 7160 states and 21240 transitions. [2021-03-10 21:25:16,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:16,108 INFO L276 IsEmpty]: Start isEmpty. Operand 7160 states and 21240 transitions. [2021-03-10 21:25:16,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:16,115 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:16,115 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:16,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3250 [2021-03-10 21:25:16,315 INFO L428 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:16,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:16,315 INFO L82 PathProgramCache]: Analyzing trace with hash 191557717, now seen corresponding path program 242 times [2021-03-10 21:25:16,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:16,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137065917] [2021-03-10 21:25:16,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:16,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:16,398 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:16,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137065917] [2021-03-10 21:25:16,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036153173] [2021-03-10 21:25:16,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:16,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:25:16,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:16,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:16,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:16,468 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:16,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:16,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:25:16,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359424542] [2021-03-10 21:25:16,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:16,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:16,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:16,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:16,469 INFO L87 Difference]: Start difference. First operand 7160 states and 21240 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:16,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:16,622 INFO L93 Difference]: Finished difference Result 8322 states and 23810 transitions. [2021-03-10 21:25:16,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:25:16,623 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:16,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:16,631 INFO L225 Difference]: With dead ends: 8322 [2021-03-10 21:25:16,631 INFO L226 Difference]: Without dead ends: 8322 [2021-03-10 21:25:16,632 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 136.7ms TimeCoverageRelationStatistics Valid=206, Invalid=394, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:25:16,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8322 states. [2021-03-10 21:25:16,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8322 to 7016. [2021-03-10 21:25:16,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7016 states, 7015 states have (on average 2.9642195295794727) internal successors, (20794), 7015 states have internal predecessors, (20794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:16,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7016 states to 7016 states and 20794 transitions. [2021-03-10 21:25:16,720 INFO L78 Accepts]: Start accepts. Automaton has 7016 states and 20794 transitions. Word has length 22 [2021-03-10 21:25:16,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:16,721 INFO L480 AbstractCegarLoop]: Abstraction has 7016 states and 20794 transitions. [2021-03-10 21:25:16,721 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:16,721 INFO L276 IsEmpty]: Start isEmpty. Operand 7016 states and 20794 transitions. [2021-03-10 21:25:16,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:16,727 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:16,727 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:16,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 244 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3251 [2021-03-10 21:25:16,927 INFO L428 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:16,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:16,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1674692655, now seen corresponding path program 243 times [2021-03-10 21:25:16,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:16,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218420063] [2021-03-10 21:25:16,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:16,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:17,000 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:17,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218420063] [2021-03-10 21:25:17,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753513420] [2021-03-10 21:25:17,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:17,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:25:17,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:17,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:17,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:17,072 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:17,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:17,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:25:17,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875652920] [2021-03-10 21:25:17,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:17,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:17,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:17,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:17,073 INFO L87 Difference]: Start difference. First operand 7016 states and 20794 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:17,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:17,308 INFO L93 Difference]: Finished difference Result 10804 states and 31397 transitions. [2021-03-10 21:25:17,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:25:17,308 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:17,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:17,320 INFO L225 Difference]: With dead ends: 10804 [2021-03-10 21:25:17,320 INFO L226 Difference]: Without dead ends: 10804 [2021-03-10 21:25:17,321 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 197.9ms TimeCoverageRelationStatistics Valid=363, Invalid=693, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:25:17,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10804 states. [2021-03-10 21:25:17,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10804 to 8931. [2021-03-10 21:25:17,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8931 states, 8930 states have (on average 3.0094064949608064) internal successors, (26874), 8930 states have internal predecessors, (26874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:17,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8931 states to 8931 states and 26874 transitions. [2021-03-10 21:25:17,450 INFO L78 Accepts]: Start accepts. Automaton has 8931 states and 26874 transitions. Word has length 22 [2021-03-10 21:25:17,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:17,450 INFO L480 AbstractCegarLoop]: Abstraction has 8931 states and 26874 transitions. [2021-03-10 21:25:17,450 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:17,450 INFO L276 IsEmpty]: Start isEmpty. Operand 8931 states and 26874 transitions. [2021-03-10 21:25:17,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:17,457 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:17,457 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:17,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3252 [2021-03-10 21:25:17,658 INFO L428 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:17,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:17,658 INFO L82 PathProgramCache]: Analyzing trace with hash 962372481, now seen corresponding path program 244 times [2021-03-10 21:25:17,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:17,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714025394] [2021-03-10 21:25:17,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:17,721 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:17,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714025394] [2021-03-10 21:25:17,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694268074] [2021-03-10 21:25:17,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:17,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:25:17,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:17,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:17,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:17,784 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:17,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:17,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:25:17,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035307361] [2021-03-10 21:25:17,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:17,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:17,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:17,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:17,784 INFO L87 Difference]: Start difference. First operand 8931 states and 26874 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:17,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:17,883 INFO L93 Difference]: Finished difference Result 9250 states and 27288 transitions. [2021-03-10 21:25:17,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:25:17,884 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:17,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:17,893 INFO L225 Difference]: With dead ends: 9250 [2021-03-10 21:25:17,893 INFO L226 Difference]: Without dead ends: 9249 [2021-03-10 21:25:17,894 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:25:17,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9249 states. [2021-03-10 21:25:17,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9249 to 8667. [2021-03-10 21:25:17,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8667 states, 8666 states have (on average 3.0012693284098777) internal successors, (26009), 8666 states have internal predecessors, (26009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:18,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8667 states to 8667 states and 26009 transitions. [2021-03-10 21:25:18,007 INFO L78 Accepts]: Start accepts. Automaton has 8667 states and 26009 transitions. Word has length 22 [2021-03-10 21:25:18,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:18,007 INFO L480 AbstractCegarLoop]: Abstraction has 8667 states and 26009 transitions. [2021-03-10 21:25:18,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:18,007 INFO L276 IsEmpty]: Start isEmpty. Operand 8667 states and 26009 transitions. [2021-03-10 21:25:18,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:18,015 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:18,015 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:18,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3253,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:18,215 INFO L428 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:18,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:18,215 INFO L82 PathProgramCache]: Analyzing trace with hash 456026215, now seen corresponding path program 245 times [2021-03-10 21:25:18,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:18,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294820491] [2021-03-10 21:25:18,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:18,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:18,359 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:18,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294820491] [2021-03-10 21:25:18,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671225277] [2021-03-10 21:25:18,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:18,380 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:25:18,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:18,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:18,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:18,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:18,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:25:18,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793762530] [2021-03-10 21:25:18,422 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:18,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:18,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:18,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:18,423 INFO L87 Difference]: Start difference. First operand 8667 states and 26009 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:18,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:18,571 INFO L93 Difference]: Finished difference Result 9868 states and 29015 transitions. [2021-03-10 21:25:18,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:25:18,572 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:18,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:18,583 INFO L225 Difference]: With dead ends: 9868 [2021-03-10 21:25:18,583 INFO L226 Difference]: Without dead ends: 9868 [2021-03-10 21:25:18,584 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 197.1ms TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:25:18,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9868 states. [2021-03-10 21:25:18,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9868 to 6055. [2021-03-10 21:25:18,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6055 states, 6054 states have (on average 2.9398744631648497) internal successors, (17798), 6054 states have internal predecessors, (17798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:18,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6055 states to 6055 states and 17798 transitions. [2021-03-10 21:25:18,672 INFO L78 Accepts]: Start accepts. Automaton has 6055 states and 17798 transitions. Word has length 22 [2021-03-10 21:25:18,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:18,672 INFO L480 AbstractCegarLoop]: Abstraction has 6055 states and 17798 transitions. [2021-03-10 21:25:18,672 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:18,672 INFO L276 IsEmpty]: Start isEmpty. Operand 6055 states and 17798 transitions. [2021-03-10 21:25:18,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:18,678 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:18,678 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:18,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3254 [2021-03-10 21:25:18,878 INFO L428 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:18,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:18,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1939161153, now seen corresponding path program 246 times [2021-03-10 21:25:18,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:18,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483630312] [2021-03-10 21:25:18,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:18,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:18,952 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:18,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483630312] [2021-03-10 21:25:18,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847595078] [2021-03-10 21:25:18,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:18,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:25:18,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:18,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:18,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:19,016 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:19,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:19,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:25:19,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824219462] [2021-03-10 21:25:19,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:19,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:19,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:19,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:19,017 INFO L87 Difference]: Start difference. First operand 6055 states and 17798 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:19,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:19,261 INFO L93 Difference]: Finished difference Result 8378 states and 23833 transitions. [2021-03-10 21:25:19,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:25:19,261 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:19,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:19,270 INFO L225 Difference]: With dead ends: 8378 [2021-03-10 21:25:19,270 INFO L226 Difference]: Without dead ends: 8378 [2021-03-10 21:25:19,270 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 192.4ms TimeCoverageRelationStatistics Valid=362, Invalid=694, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:25:19,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8378 states. [2021-03-10 21:25:19,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8378 to 4616. [2021-03-10 21:25:19,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4616 states, 4615 states have (on average 2.9371614301191764) internal successors, (13555), 4615 states have internal predecessors, (13555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:19,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4616 states to 4616 states and 13555 transitions. [2021-03-10 21:25:19,339 INFO L78 Accepts]: Start accepts. Automaton has 4616 states and 13555 transitions. Word has length 22 [2021-03-10 21:25:19,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:19,339 INFO L480 AbstractCegarLoop]: Abstraction has 4616 states and 13555 transitions. [2021-03-10 21:25:19,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:19,339 INFO L276 IsEmpty]: Start isEmpty. Operand 4616 states and 13555 transitions. [2021-03-10 21:25:19,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:19,343 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:19,343 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:19,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3255,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:19,551 INFO L428 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:19,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:19,551 INFO L82 PathProgramCache]: Analyzing trace with hash -611442137, now seen corresponding path program 247 times [2021-03-10 21:25:19,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:19,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605705083] [2021-03-10 21:25:19,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:19,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:19,626 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:19,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605705083] [2021-03-10 21:25:19,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032231980] [2021-03-10 21:25:19,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:19,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:19,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:19,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:19,688 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:19,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:19,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:25:19,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35985462] [2021-03-10 21:25:19,689 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:19,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:19,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:19,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:19,689 INFO L87 Difference]: Start difference. First operand 4616 states and 13555 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:19,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:19,908 INFO L93 Difference]: Finished difference Result 7421 states and 21200 transitions. [2021-03-10 21:25:19,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:25:19,908 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:19,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:19,916 INFO L225 Difference]: With dead ends: 7421 [2021-03-10 21:25:19,916 INFO L226 Difference]: Without dead ends: 7421 [2021-03-10 21:25:19,916 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 177.0ms TimeCoverageRelationStatistics Valid=319, Invalid=611, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:25:19,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7421 states. [2021-03-10 21:25:19,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7421 to 6529. [2021-03-10 21:25:19,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6529 states, 6528 states have (on average 2.9543504901960786) internal successors, (19286), 6528 states have internal predecessors, (19286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:19,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6529 states to 6529 states and 19286 transitions. [2021-03-10 21:25:19,997 INFO L78 Accepts]: Start accepts. Automaton has 6529 states and 19286 transitions. Word has length 22 [2021-03-10 21:25:19,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:19,997 INFO L480 AbstractCegarLoop]: Abstraction has 6529 states and 19286 transitions. [2021-03-10 21:25:19,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:19,998 INFO L276 IsEmpty]: Start isEmpty. Operand 6529 states and 19286 transitions. [2021-03-10 21:25:20,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:20,003 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:20,003 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:20,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3256,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:20,204 INFO L428 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:20,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:20,204 INFO L82 PathProgramCache]: Analyzing trace with hash -690395165, now seen corresponding path program 248 times [2021-03-10 21:25:20,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:20,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378709511] [2021-03-10 21:25:20,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:20,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:20,254 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:20,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378709511] [2021-03-10 21:25:20,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381441125] [2021-03-10 21:25:20,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:20,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:25:20,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:20,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:20,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:20,324 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:20,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:20,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:25:20,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519283210] [2021-03-10 21:25:20,325 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:25:20,325 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:20,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:25:20,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:25:20,325 INFO L87 Difference]: Start difference. First operand 6529 states and 19286 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:20,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:20,472 INFO L93 Difference]: Finished difference Result 6802 states and 19658 transitions. [2021-03-10 21:25:20,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:25:20,472 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:20,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:20,481 INFO L225 Difference]: With dead ends: 6802 [2021-03-10 21:25:20,481 INFO L226 Difference]: Without dead ends: 6798 [2021-03-10 21:25:20,481 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:25:20,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6798 states. [2021-03-10 21:25:20,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6798 to 6498. [2021-03-10 21:25:20,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6498 states, 6497 states have (on average 2.950592581191319) internal successors, (19170), 6497 states have internal predecessors, (19170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:20,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6498 states to 6498 states and 19170 transitions. [2021-03-10 21:25:20,570 INFO L78 Accepts]: Start accepts. Automaton has 6498 states and 19170 transitions. Word has length 22 [2021-03-10 21:25:20,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:20,570 INFO L480 AbstractCegarLoop]: Abstraction has 6498 states and 19170 transitions. [2021-03-10 21:25:20,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:20,570 INFO L276 IsEmpty]: Start isEmpty. Operand 6498 states and 19170 transitions. [2021-03-10 21:25:20,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:20,575 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:20,575 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:20,776 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3257,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:20,776 INFO L428 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:20,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:20,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1027353895, now seen corresponding path program 249 times [2021-03-10 21:25:20,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:20,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072417219] [2021-03-10 21:25:20,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:20,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:20,826 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:20,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072417219] [2021-03-10 21:25:20,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136869246] [2021-03-10 21:25:20,827 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:20,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:25:20,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:20,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:20,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:20,890 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 24 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:20,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:20,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:25:20,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844143832] [2021-03-10 21:25:20,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:25:20,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:20,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:25:20,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:25:20,891 INFO L87 Difference]: Start difference. First operand 6498 states and 19170 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:20,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:20,998 INFO L93 Difference]: Finished difference Result 7322 states and 20998 transitions. [2021-03-10 21:25:20,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:25:20,999 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:20,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:21,007 INFO L225 Difference]: With dead ends: 7322 [2021-03-10 21:25:21,007 INFO L226 Difference]: Without dead ends: 7322 [2021-03-10 21:25:21,007 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 72.8ms TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:25:21,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7322 states. [2021-03-10 21:25:21,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7322 to 6505. [2021-03-10 21:25:21,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6505 states, 6504 states have (on average 2.950030750307503) internal successors, (19187), 6504 states have internal predecessors, (19187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:21,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6505 states to 6505 states and 19187 transitions. [2021-03-10 21:25:21,128 INFO L78 Accepts]: Start accepts. Automaton has 6505 states and 19187 transitions. Word has length 22 [2021-03-10 21:25:21,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:21,128 INFO L480 AbstractCegarLoop]: Abstraction has 6505 states and 19187 transitions. [2021-03-10 21:25:21,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:21,128 INFO L276 IsEmpty]: Start isEmpty. Operand 6505 states and 19187 transitions. [2021-03-10 21:25:21,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:21,133 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:21,133 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:21,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3258,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:21,334 INFO L428 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:21,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:21,335 INFO L82 PathProgramCache]: Analyzing trace with hash -701693439, now seen corresponding path program 250 times [2021-03-10 21:25:21,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:21,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325161434] [2021-03-10 21:25:21,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:21,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:21,390 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:21,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325161434] [2021-03-10 21:25:21,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861953467] [2021-03-10 21:25:21,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:21,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:25:21,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:21,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:21,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:21,453 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:21,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:21,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:25:21,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842229787] [2021-03-10 21:25:21,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:25:21,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:21,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:25:21,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:25:21,454 INFO L87 Difference]: Start difference. First operand 6505 states and 19187 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:21,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:21,583 INFO L93 Difference]: Finished difference Result 7657 states and 21924 transitions. [2021-03-10 21:25:21,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:25:21,584 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:21,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:21,592 INFO L225 Difference]: With dead ends: 7657 [2021-03-10 21:25:21,592 INFO L226 Difference]: Without dead ends: 7657 [2021-03-10 21:25:21,592 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 98.9ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:25:21,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7657 states. [2021-03-10 21:25:21,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7657 to 6280. [2021-03-10 21:25:21,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6280 states, 6279 states have (on average 2.94186972447842) internal successors, (18472), 6279 states have internal predecessors, (18472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:21,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6280 states to 6280 states and 18472 transitions. [2021-03-10 21:25:21,675 INFO L78 Accepts]: Start accepts. Automaton has 6280 states and 18472 transitions. Word has length 22 [2021-03-10 21:25:21,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:21,675 INFO L480 AbstractCegarLoop]: Abstraction has 6280 states and 18472 transitions. [2021-03-10 21:25:21,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:21,676 INFO L276 IsEmpty]: Start isEmpty. Operand 6280 states and 18472 transitions. [2021-03-10 21:25:21,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:21,680 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:21,680 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:21,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3259 [2021-03-10 21:25:21,881 INFO L428 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:21,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:21,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1532414055, now seen corresponding path program 251 times [2021-03-10 21:25:21,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:21,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147514955] [2021-03-10 21:25:21,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:21,938 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:21,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147514955] [2021-03-10 21:25:21,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841450855] [2021-03-10 21:25:21,939 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:21,959 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:25:21,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:21,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:21,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:22,002 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:22,002 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:22,002 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:25:22,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836328418] [2021-03-10 21:25:22,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:25:22,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:22,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:25:22,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:25:22,003 INFO L87 Difference]: Start difference. First operand 6280 states and 18472 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:22,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:22,135 INFO L93 Difference]: Finished difference Result 8774 states and 25325 transitions. [2021-03-10 21:25:22,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:25:22,136 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:22,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:22,145 INFO L225 Difference]: With dead ends: 8774 [2021-03-10 21:25:22,145 INFO L226 Difference]: Without dead ends: 8774 [2021-03-10 21:25:22,145 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 109.6ms TimeCoverageRelationStatistics Valid=183, Invalid=323, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:25:22,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8774 states. [2021-03-10 21:25:22,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8774 to 7854. [2021-03-10 21:25:22,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7854 states, 7853 states have (on average 2.9848465554565133) internal successors, (23440), 7853 states have internal predecessors, (23440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:22,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7854 states to 7854 states and 23440 transitions. [2021-03-10 21:25:22,244 INFO L78 Accepts]: Start accepts. Automaton has 7854 states and 23440 transitions. Word has length 22 [2021-03-10 21:25:22,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:22,244 INFO L480 AbstractCegarLoop]: Abstraction has 7854 states and 23440 transitions. [2021-03-10 21:25:22,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:22,244 INFO L276 IsEmpty]: Start isEmpty. Operand 7854 states and 23440 transitions. [2021-03-10 21:25:22,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:22,251 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:22,251 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:22,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3260 [2021-03-10 21:25:22,453 INFO L428 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:22,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:22,453 INFO L82 PathProgramCache]: Analyzing trace with hash 2070269633, now seen corresponding path program 252 times [2021-03-10 21:25:22,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:22,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983262447] [2021-03-10 21:25:22,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:22,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:22,517 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:22,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983262447] [2021-03-10 21:25:22,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662561144] [2021-03-10 21:25:22,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:22,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:25:22,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:22,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:22,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:22,581 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:22,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:22,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:25:22,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370636581] [2021-03-10 21:25:22,581 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:22,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:22,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:22,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:22,582 INFO L87 Difference]: Start difference. First operand 7854 states and 23440 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:22,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:22,715 INFO L93 Difference]: Finished difference Result 8525 states and 24660 transitions. [2021-03-10 21:25:22,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:25:22,716 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:22,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:22,729 INFO L225 Difference]: With dead ends: 8525 [2021-03-10 21:25:22,729 INFO L226 Difference]: Without dead ends: 8525 [2021-03-10 21:25:22,730 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 109.5ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:25:22,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8525 states. [2021-03-10 21:25:22,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8525 to 7170. [2021-03-10 21:25:22,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7170 states, 7169 states have (on average 2.9768447482215095) internal successors, (21341), 7169 states have internal predecessors, (21341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:22,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7170 states to 7170 states and 21341 transitions. [2021-03-10 21:25:22,844 INFO L78 Accepts]: Start accepts. Automaton has 7170 states and 21341 transitions. Word has length 22 [2021-03-10 21:25:22,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:22,844 INFO L480 AbstractCegarLoop]: Abstraction has 7170 states and 21341 transitions. [2021-03-10 21:25:22,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:22,844 INFO L276 IsEmpty]: Start isEmpty. Operand 7170 states and 21341 transitions. [2021-03-10 21:25:22,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:22,850 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:22,850 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:23,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3261,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:23,052 INFO L428 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:23,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:23,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1563923367, now seen corresponding path program 253 times [2021-03-10 21:25:23,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:23,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972446051] [2021-03-10 21:25:23,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:23,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:23,120 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:23,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972446051] [2021-03-10 21:25:23,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725199083] [2021-03-10 21:25:23,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:23,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:23,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:23,185 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:23,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:23,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:25:23,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338650407] [2021-03-10 21:25:23,185 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:23,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:23,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:23,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:23,186 INFO L87 Difference]: Start difference. First operand 7170 states and 21341 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:23,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:23,302 INFO L93 Difference]: Finished difference Result 10318 states and 30338 transitions. [2021-03-10 21:25:23,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:25:23,303 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:23,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:23,315 INFO L225 Difference]: With dead ends: 10318 [2021-03-10 21:25:23,315 INFO L226 Difference]: Without dead ends: 10318 [2021-03-10 21:25:23,315 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:25:23,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10318 states. [2021-03-10 21:25:23,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10318 to 9947. [2021-03-10 21:25:23,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9947 states, 9946 states have (on average 2.995475568067565) internal successors, (29793), 9946 states have internal predecessors, (29793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:23,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9947 states to 9947 states and 29793 transitions. [2021-03-10 21:25:23,437 INFO L78 Accepts]: Start accepts. Automaton has 9947 states and 29793 transitions. Word has length 22 [2021-03-10 21:25:23,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:23,437 INFO L480 AbstractCegarLoop]: Abstraction has 9947 states and 29793 transitions. [2021-03-10 21:25:23,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:23,437 INFO L276 IsEmpty]: Start isEmpty. Operand 9947 states and 29793 transitions. [2021-03-10 21:25:23,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:23,445 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:23,445 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:23,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3262 [2021-03-10 21:25:23,646 INFO L428 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:23,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:23,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1247908991, now seen corresponding path program 254 times [2021-03-10 21:25:23,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:23,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416138568] [2021-03-10 21:25:23,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:23,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:23,735 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:23,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416138568] [2021-03-10 21:25:23,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391731571] [2021-03-10 21:25:23,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:23,761 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:25:23,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:23,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:23,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:23,804 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:23,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:23,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:25:23,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548090100] [2021-03-10 21:25:23,805 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:23,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:23,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:23,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:23,805 INFO L87 Difference]: Start difference. First operand 9947 states and 29793 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:24,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:24,013 INFO L93 Difference]: Finished difference Result 10463 states and 30703 transitions. [2021-03-10 21:25:24,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:25:24,013 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:24,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:24,025 INFO L225 Difference]: With dead ends: 10463 [2021-03-10 21:25:24,025 INFO L226 Difference]: Without dead ends: 10463 [2021-03-10 21:25:24,025 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 179.5ms TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:25:24,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10463 states. [2021-03-10 21:25:24,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10463 to 9768. [2021-03-10 21:25:24,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9768 states, 9767 states have (on average 2.995392648715061) internal successors, (29256), 9767 states have internal predecessors, (29256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:24,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9768 states to 9768 states and 29256 transitions. [2021-03-10 21:25:24,157 INFO L78 Accepts]: Start accepts. Automaton has 9768 states and 29256 transitions. Word has length 22 [2021-03-10 21:25:24,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:24,157 INFO L480 AbstractCegarLoop]: Abstraction has 9768 states and 29256 transitions. [2021-03-10 21:25:24,157 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:24,158 INFO L276 IsEmpty]: Start isEmpty. Operand 9768 states and 29256 transitions. [2021-03-10 21:25:24,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:24,165 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:24,165 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:24,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3263,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:24,366 INFO L428 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:24,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:24,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1779601127, now seen corresponding path program 255 times [2021-03-10 21:25:24,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:24,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439524287] [2021-03-10 21:25:24,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:24,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:24,444 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:24,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439524287] [2021-03-10 21:25:24,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865506241] [2021-03-10 21:25:24,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:24,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:25:24,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:24,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:24,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:24,518 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:24,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:24,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:25:24,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310188740] [2021-03-10 21:25:24,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:24,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:24,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:24,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:24,519 INFO L87 Difference]: Start difference. First operand 9768 states and 29256 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:24,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:24,800 INFO L93 Difference]: Finished difference Result 11837 states and 34803 transitions. [2021-03-10 21:25:24,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:25:24,801 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:24,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:24,814 INFO L225 Difference]: With dead ends: 11837 [2021-03-10 21:25:24,814 INFO L226 Difference]: Without dead ends: 11837 [2021-03-10 21:25:24,815 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 234.0ms TimeCoverageRelationStatistics Valid=448, Invalid=884, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:25:24,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11837 states. [2021-03-10 21:25:24,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11837 to 11079. [2021-03-10 21:25:24,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11079 states, 11078 states have (on average 2.998826502978877) internal successors, (33221), 11078 states have internal predecessors, (33221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:24,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11079 states to 11079 states and 33221 transitions. [2021-03-10 21:25:24,957 INFO L78 Accepts]: Start accepts. Automaton has 11079 states and 33221 transitions. Word has length 22 [2021-03-10 21:25:24,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:24,957 INFO L480 AbstractCegarLoop]: Abstraction has 11079 states and 33221 transitions. [2021-03-10 21:25:24,958 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:24,958 INFO L276 IsEmpty]: Start isEmpty. Operand 11079 states and 33221 transitions. [2021-03-10 21:25:24,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:24,967 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:24,967 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:25,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3264 [2021-03-10 21:25:25,170 INFO L428 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:25,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:25,170 INFO L82 PathProgramCache]: Analyzing trace with hash 1826781103, now seen corresponding path program 256 times [2021-03-10 21:25:25,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:25,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739413244] [2021-03-10 21:25:25,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:25,238 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:25,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739413244] [2021-03-10 21:25:25,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484063723] [2021-03-10 21:25:25,238 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:25,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:25:25,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:25,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:25,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:25,295 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:25,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:25,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:25:25,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993849039] [2021-03-10 21:25:25,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:25,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:25,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:25,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:25,296 INFO L87 Difference]: Start difference. First operand 11079 states and 33221 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:25,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:25,536 INFO L93 Difference]: Finished difference Result 11467 states and 33833 transitions. [2021-03-10 21:25:25,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:25:25,536 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:25,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:25,548 INFO L225 Difference]: With dead ends: 11467 [2021-03-10 21:25:25,549 INFO L226 Difference]: Without dead ends: 11459 [2021-03-10 21:25:25,549 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 163.9ms TimeCoverageRelationStatistics Valid=273, Invalid=539, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:25:25,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11459 states. [2021-03-10 21:25:25,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11459 to 11123. [2021-03-10 21:25:25,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11123 states, 11122 states have (on average 2.999550440568243) internal successors, (33361), 11122 states have internal predecessors, (33361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:25,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11123 states to 11123 states and 33361 transitions. [2021-03-10 21:25:25,687 INFO L78 Accepts]: Start accepts. Automaton has 11123 states and 33361 transitions. Word has length 22 [2021-03-10 21:25:25,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:25,687 INFO L480 AbstractCegarLoop]: Abstraction has 11123 states and 33361 transitions. [2021-03-10 21:25:25,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:25,687 INFO L276 IsEmpty]: Start isEmpty. Operand 11123 states and 33361 transitions. [2021-03-10 21:25:25,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:25,696 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:25,696 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:25,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3265 [2021-03-10 21:25:25,899 INFO L428 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:25,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:25,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1995549679, now seen corresponding path program 257 times [2021-03-10 21:25:25,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:25,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266244535] [2021-03-10 21:25:25,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:25,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:25,977 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:25,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266244535] [2021-03-10 21:25:25,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064558597] [2021-03-10 21:25:25,977 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:25,997 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:25:25,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:25,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:25,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:26,040 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:26,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:26,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:25:26,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923021002] [2021-03-10 21:25:26,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:26,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:26,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:26,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:26,041 INFO L87 Difference]: Start difference. First operand 11123 states and 33361 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:26,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:26,268 INFO L93 Difference]: Finished difference Result 14272 states and 42332 transitions. [2021-03-10 21:25:26,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:25:26,268 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:26,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:26,287 INFO L225 Difference]: With dead ends: 14272 [2021-03-10 21:25:26,287 INFO L226 Difference]: Without dead ends: 14272 [2021-03-10 21:25:26,287 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 179.8ms TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:25:26,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14272 states. [2021-03-10 21:25:26,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14272 to 8542. [2021-03-10 21:25:26,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8542 states, 8541 states have (on average 2.9779885259337315) internal successors, (25435), 8541 states have internal predecessors, (25435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:26,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8542 states to 8542 states and 25435 transitions. [2021-03-10 21:25:26,474 INFO L78 Accepts]: Start accepts. Automaton has 8542 states and 25435 transitions. Word has length 22 [2021-03-10 21:25:26,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:26,475 INFO L480 AbstractCegarLoop]: Abstraction has 8542 states and 25435 transitions. [2021-03-10 21:25:26,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:26,475 INFO L276 IsEmpty]: Start isEmpty. Operand 8542 states and 25435 transitions. [2021-03-10 21:25:26,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:26,485 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:26,485 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:26,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3266,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:26,685 INFO L428 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:26,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:26,685 INFO L82 PathProgramCache]: Analyzing trace with hash -155561425, now seen corresponding path program 258 times [2021-03-10 21:25:26,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:26,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157894159] [2021-03-10 21:25:26,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:26,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:26,746 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:26,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157894159] [2021-03-10 21:25:26,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3988444] [2021-03-10 21:25:26,746 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:26,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:25:26,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:26,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:26,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:26,810 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 22 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:26,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:26,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:25:26,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451832270] [2021-03-10 21:25:26,810 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:25:26,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:26,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:25:26,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:25:26,811 INFO L87 Difference]: Start difference. First operand 8542 states and 25435 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:26,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:26,954 INFO L93 Difference]: Finished difference Result 9541 states and 27821 transitions. [2021-03-10 21:25:26,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:25:26,954 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:26,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:26,965 INFO L225 Difference]: With dead ends: 9541 [2021-03-10 21:25:26,965 INFO L226 Difference]: Without dead ends: 9541 [2021-03-10 21:25:26,965 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:25:26,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9541 states. [2021-03-10 21:25:27,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9541 to 8634. [2021-03-10 21:25:27,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8634 states, 8633 states have (on average 2.976833082358392) internal successors, (25699), 8633 states have internal predecessors, (25699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:27,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8634 states to 8634 states and 25699 transitions. [2021-03-10 21:25:27,082 INFO L78 Accepts]: Start accepts. Automaton has 8634 states and 25699 transitions. Word has length 22 [2021-03-10 21:25:27,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:27,082 INFO L480 AbstractCegarLoop]: Abstraction has 8634 states and 25699 transitions. [2021-03-10 21:25:27,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:27,082 INFO L276 IsEmpty]: Start isEmpty. Operand 8634 states and 25699 transitions. [2021-03-10 21:25:27,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:27,089 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:27,089 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:27,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3267,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:27,289 INFO L428 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:27,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:27,289 INFO L82 PathProgramCache]: Analyzing trace with hash 382294153, now seen corresponding path program 259 times [2021-03-10 21:25:27,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:27,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063419909] [2021-03-10 21:25:27,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:27,355 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:27,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063419909] [2021-03-10 21:25:27,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729364909] [2021-03-10 21:25:27,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:27,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:27,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:27,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:27,417 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 21 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:27,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:27,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:25:27,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218575510] [2021-03-10 21:25:27,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:27,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:27,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:27,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:27,418 INFO L87 Difference]: Start difference. First operand 8634 states and 25699 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:27,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:27,554 INFO L93 Difference]: Finished difference Result 9330 states and 27244 transitions. [2021-03-10 21:25:27,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:25:27,555 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:27,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:27,565 INFO L225 Difference]: With dead ends: 9330 [2021-03-10 21:25:27,565 INFO L226 Difference]: Without dead ends: 9330 [2021-03-10 21:25:27,565 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:25:27,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9330 states. [2021-03-10 21:25:27,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9330 to 6762. [2021-03-10 21:25:27,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6762 states, 6761 states have (on average 2.9630232214169503) internal successors, (20033), 6761 states have internal predecessors, (20033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:27,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6762 states to 6762 states and 20033 transitions. [2021-03-10 21:25:27,652 INFO L78 Accepts]: Start accepts. Automaton has 6762 states and 20033 transitions. Word has length 22 [2021-03-10 21:25:27,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:27,652 INFO L480 AbstractCegarLoop]: Abstraction has 6762 states and 20033 transitions. [2021-03-10 21:25:27,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:27,652 INFO L276 IsEmpty]: Start isEmpty. Operand 6762 states and 20033 transitions. [2021-03-10 21:25:27,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:27,657 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:27,657 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:27,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3268,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:27,857 INFO L428 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:27,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:27,857 INFO L82 PathProgramCache]: Analyzing trace with hash -124052113, now seen corresponding path program 260 times [2021-03-10 21:25:27,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:27,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955597718] [2021-03-10 21:25:27,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:27,927 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:27,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955597718] [2021-03-10 21:25:27,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475491835] [2021-03-10 21:25:27,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:27,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:25:27,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:27,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:27,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:27,990 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:27,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:27,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:25:27,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191725588] [2021-03-10 21:25:27,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:27,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:27,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:27,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:27,991 INFO L87 Difference]: Start difference. First operand 6762 states and 20033 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:28,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:28,106 INFO L93 Difference]: Finished difference Result 8299 states and 24037 transitions. [2021-03-10 21:25:28,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:25:28,106 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:28,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:28,115 INFO L225 Difference]: With dead ends: 8299 [2021-03-10 21:25:28,115 INFO L226 Difference]: Without dead ends: 8299 [2021-03-10 21:25:28,115 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 104.1ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:25:28,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8299 states. [2021-03-10 21:25:28,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8299 to 7676. [2021-03-10 21:25:28,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7676 states, 7675 states have (on average 2.9603908794788274) internal successors, (22721), 7675 states have internal predecessors, (22721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:28,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7676 states to 7676 states and 22721 transitions. [2021-03-10 21:25:28,219 INFO L78 Accepts]: Start accepts. Automaton has 7676 states and 22721 transitions. Word has length 22 [2021-03-10 21:25:28,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:28,219 INFO L480 AbstractCegarLoop]: Abstraction has 7676 states and 22721 transitions. [2021-03-10 21:25:28,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:28,219 INFO L276 IsEmpty]: Start isEmpty. Operand 7676 states and 22721 transitions. [2021-03-10 21:25:28,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:28,226 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:28,226 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:28,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3269,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:28,426 INFO L428 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:28,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:28,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1359082825, now seen corresponding path program 261 times [2021-03-10 21:25:28,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:28,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660006724] [2021-03-10 21:25:28,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:28,519 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:28,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660006724] [2021-03-10 21:25:28,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220716193] [2021-03-10 21:25:28,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:28,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:25:28,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:28,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:28,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:28,582 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:28,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:28,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:25:28,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305051656] [2021-03-10 21:25:28,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:28,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:28,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:28,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:28,583 INFO L87 Difference]: Start difference. First operand 7676 states and 22721 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:28,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:28,767 INFO L93 Difference]: Finished difference Result 8482 states and 24462 transitions. [2021-03-10 21:25:28,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:25:28,767 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:28,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:28,776 INFO L225 Difference]: With dead ends: 8482 [2021-03-10 21:25:28,776 INFO L226 Difference]: Without dead ends: 8482 [2021-03-10 21:25:28,776 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 165.8ms TimeCoverageRelationStatistics Valid=249, Invalid=507, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:25:28,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8482 states. [2021-03-10 21:25:28,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8482 to 7047. [2021-03-10 21:25:28,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7047 states, 7046 states have (on average 2.9541583877377233) internal successors, (20815), 7046 states have internal predecessors, (20815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:28,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7047 states to 7047 states and 20815 transitions. [2021-03-10 21:25:28,862 INFO L78 Accepts]: Start accepts. Automaton has 7047 states and 20815 transitions. Word has length 22 [2021-03-10 21:25:28,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:28,862 INFO L480 AbstractCegarLoop]: Abstraction has 7047 states and 20815 transitions. [2021-03-10 21:25:28,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:28,862 INFO L276 IsEmpty]: Start isEmpty. Operand 7047 states and 20815 transitions. [2021-03-10 21:25:28,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:28,867 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:28,867 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:29,067 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3270 [2021-03-10 21:25:29,068 INFO L428 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:29,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:29,068 INFO L82 PathProgramCache]: Analyzing trace with hash 91625647, now seen corresponding path program 262 times [2021-03-10 21:25:29,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:29,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313012316] [2021-03-10 21:25:29,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:29,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:29,184 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:29,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313012316] [2021-03-10 21:25:29,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703562074] [2021-03-10 21:25:29,185 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:29,203 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:25:29,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:29,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:29,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:29,246 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:29,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:29,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:25:29,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916729177] [2021-03-10 21:25:29,246 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:29,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:29,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:29,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:29,246 INFO L87 Difference]: Start difference. First operand 7047 states and 20815 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:29,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:29,521 INFO L93 Difference]: Finished difference Result 8517 states and 24388 transitions. [2021-03-10 21:25:29,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:25:29,522 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:29,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:29,532 INFO L225 Difference]: With dead ends: 8517 [2021-03-10 21:25:29,532 INFO L226 Difference]: Without dead ends: 8517 [2021-03-10 21:25:29,532 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 237.3ms TimeCoverageRelationStatistics Valid=447, Invalid=885, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:25:29,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8517 states. [2021-03-10 21:25:29,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8517 to 6822. [2021-03-10 21:25:29,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6822 states, 6821 states have (on average 2.9705321800322535) internal successors, (20262), 6821 states have internal predecessors, (20262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:29,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6822 states to 6822 states and 20262 transitions. [2021-03-10 21:25:29,618 INFO L78 Accepts]: Start accepts. Automaton has 6822 states and 20262 transitions. Word has length 22 [2021-03-10 21:25:29,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:29,618 INFO L480 AbstractCegarLoop]: Abstraction has 6822 states and 20262 transitions. [2021-03-10 21:25:29,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:29,618 INFO L276 IsEmpty]: Start isEmpty. Operand 6822 states and 20262 transitions. [2021-03-10 21:25:29,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:29,622 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:29,622 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:29,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3271 [2021-03-10 21:25:29,823 INFO L428 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:29,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:29,823 INFO L82 PathProgramCache]: Analyzing trace with hash 1108198033, now seen corresponding path program 263 times [2021-03-10 21:25:29,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:29,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760081979] [2021-03-10 21:25:29,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:29,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:29,880 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:29,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760081979] [2021-03-10 21:25:29,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248188642] [2021-03-10 21:25:29,880 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:29,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:25:29,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:29,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:29,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:29,941 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:29,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:29,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:25:29,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160730766] [2021-03-10 21:25:29,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:25:29,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:29,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:25:29,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:25:29,942 INFO L87 Difference]: Start difference. First operand 6822 states and 20262 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:30,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:30,129 INFO L93 Difference]: Finished difference Result 7102 states and 20626 transitions. [2021-03-10 21:25:30,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:25:30,130 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:30,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:30,137 INFO L225 Difference]: With dead ends: 7102 [2021-03-10 21:25:30,137 INFO L226 Difference]: Without dead ends: 7096 [2021-03-10 21:25:30,137 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 133.9ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:25:30,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7096 states. [2021-03-10 21:25:30,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7096 to 6624. [2021-03-10 21:25:30,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6624 states, 6623 states have (on average 2.958930998037143) internal successors, (19597), 6623 states have internal predecessors, (19597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:30,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6624 states to 6624 states and 19597 transitions. [2021-03-10 21:25:30,223 INFO L78 Accepts]: Start accepts. Automaton has 6624 states and 19597 transitions. Word has length 22 [2021-03-10 21:25:30,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:30,223 INFO L480 AbstractCegarLoop]: Abstraction has 6624 states and 19597 transitions. [2021-03-10 21:25:30,223 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 13 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:30,223 INFO L276 IsEmpty]: Start isEmpty. Operand 6624 states and 19597 transitions. [2021-03-10 21:25:30,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:30,228 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:30,228 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:30,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3272 [2021-03-10 21:25:30,428 INFO L428 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:30,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:30,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1172512213, now seen corresponding path program 264 times [2021-03-10 21:25:30,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:30,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434813223] [2021-03-10 21:25:30,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:30,498 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:30,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434813223] [2021-03-10 21:25:30,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702161665] [2021-03-10 21:25:30,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:30,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:25:30,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:30,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:30,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:30,568 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:30,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:30,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:25:30,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361353747] [2021-03-10 21:25:30,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:30,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:30,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:30,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:30,569 INFO L87 Difference]: Start difference. First operand 6624 states and 19597 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:30,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:30,673 INFO L93 Difference]: Finished difference Result 6797 states and 19752 transitions. [2021-03-10 21:25:30,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:25:30,673 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:30,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:30,680 INFO L225 Difference]: With dead ends: 6797 [2021-03-10 21:25:30,680 INFO L226 Difference]: Without dead ends: 6795 [2021-03-10 21:25:30,680 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 102.7ms TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:25:30,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6795 states. [2021-03-10 21:25:30,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6795 to 6384. [2021-03-10 21:25:30,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6384 states, 6383 states have (on average 2.953313488955037) internal successors, (18851), 6383 states have internal predecessors, (18851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:30,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6384 states to 6384 states and 18851 transitions. [2021-03-10 21:25:30,752 INFO L78 Accepts]: Start accepts. Automaton has 6384 states and 18851 transitions. Word has length 22 [2021-03-10 21:25:30,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:30,752 INFO L480 AbstractCegarLoop]: Abstraction has 6384 states and 18851 transitions. [2021-03-10 21:25:30,752 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:30,753 INFO L276 IsEmpty]: Start isEmpty. Operand 6384 states and 18851 transitions. [2021-03-10 21:25:30,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:30,757 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:30,757 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:30,957 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3273 [2021-03-10 21:25:30,958 INFO L428 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:30,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:30,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1639320145, now seen corresponding path program 265 times [2021-03-10 21:25:30,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:30,958 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099133595] [2021-03-10 21:25:30,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:31,035 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:31,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099133595] [2021-03-10 21:25:31,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758118874] [2021-03-10 21:25:31,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:31,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:31,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:31,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:31,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:25:31,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511638427] [2021-03-10 21:25:31,105 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:25:31,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:31,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:25:31,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:25:31,105 INFO L87 Difference]: Start difference. First operand 6384 states and 18851 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:31,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:31,272 INFO L93 Difference]: Finished difference Result 6844 states and 19836 transitions. [2021-03-10 21:25:31,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:25:31,272 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:31,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:31,280 INFO L225 Difference]: With dead ends: 6844 [2021-03-10 21:25:31,280 INFO L226 Difference]: Without dead ends: 6844 [2021-03-10 21:25:31,280 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 156.3ms TimeCoverageRelationStatistics Valid=252, Invalid=504, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:25:31,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6844 states. [2021-03-10 21:25:31,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6844 to 5821. [2021-03-10 21:25:31,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5821 states, 5820 states have (on average 2.943986254295533) internal successors, (17134), 5820 states have internal predecessors, (17134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:31,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5821 states to 5821 states and 17134 transitions. [2021-03-10 21:25:31,358 INFO L78 Accepts]: Start accepts. Automaton has 5821 states and 17134 transitions. Word has length 22 [2021-03-10 21:25:31,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:31,358 INFO L480 AbstractCegarLoop]: Abstraction has 5821 states and 17134 transitions. [2021-03-10 21:25:31,358 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:31,358 INFO L276 IsEmpty]: Start isEmpty. Operand 5821 states and 17134 transitions. [2021-03-10 21:25:31,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:31,362 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:31,362 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:31,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3274 [2021-03-10 21:25:31,563 INFO L428 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:31,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:31,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1388189973, now seen corresponding path program 266 times [2021-03-10 21:25:31,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:31,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116794384] [2021-03-10 21:25:31,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:31,644 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:31,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116794384] [2021-03-10 21:25:31,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941592233] [2021-03-10 21:25:31,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:31,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:25:31,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:31,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:31,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:31,713 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:31,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:31,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:25:31,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048077960] [2021-03-10 21:25:31,714 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:25:31,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:31,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:25:31,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:25:31,714 INFO L87 Difference]: Start difference. First operand 5821 states and 17134 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:32,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:32,001 INFO L93 Difference]: Finished difference Result 6844 states and 19503 transitions. [2021-03-10 21:25:32,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:25:32,001 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:32,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:32,008 INFO L225 Difference]: With dead ends: 6844 [2021-03-10 21:25:32,008 INFO L226 Difference]: Without dead ends: 6844 [2021-03-10 21:25:32,008 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 249.6ms TimeCoverageRelationStatistics Valid=478, Invalid=928, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:25:32,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6844 states. [2021-03-10 21:25:32,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6844 to 5659. [2021-03-10 21:25:32,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5659 states, 5658 states have (on average 2.957582184517497) internal successors, (16734), 5658 states have internal predecessors, (16734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:32,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5659 states to 5659 states and 16734 transitions. [2021-03-10 21:25:32,094 INFO L78 Accepts]: Start accepts. Automaton has 5659 states and 16734 transitions. Word has length 22 [2021-03-10 21:25:32,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:32,094 INFO L480 AbstractCegarLoop]: Abstraction has 5659 states and 16734 transitions. [2021-03-10 21:25:32,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:32,094 INFO L276 IsEmpty]: Start isEmpty. Operand 5659 states and 16734 transitions. [2021-03-10 21:25:32,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:32,098 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:32,098 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:32,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3275 [2021-03-10 21:25:32,298 INFO L428 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:32,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:32,299 INFO L82 PathProgramCache]: Analyzing trace with hash -2101570705, now seen corresponding path program 267 times [2021-03-10 21:25:32,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:32,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682711341] [2021-03-10 21:25:32,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:32,349 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:32,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682711341] [2021-03-10 21:25:32,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356787728] [2021-03-10 21:25:32,350 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:32,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:25:32,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:32,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:32,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:32,408 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:32,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:32,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:25:32,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23350170] [2021-03-10 21:25:32,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:25:32,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:32,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:25:32,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:25:32,409 INFO L87 Difference]: Start difference. First operand 5659 states and 16734 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:32,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:32,558 INFO L93 Difference]: Finished difference Result 5851 states and 16961 transitions. [2021-03-10 21:25:32,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:25:32,558 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:32,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:32,564 INFO L225 Difference]: With dead ends: 5851 [2021-03-10 21:25:32,564 INFO L226 Difference]: Without dead ends: 5847 [2021-03-10 21:25:32,564 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:25:32,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5847 states. [2021-03-10 21:25:32,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5847 to 5652. [2021-03-10 21:25:32,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5652 states, 5651 states have (on average 2.956290921960715) internal successors, (16706), 5651 states have internal predecessors, (16706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:32,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5652 states to 5652 states and 16706 transitions. [2021-03-10 21:25:32,630 INFO L78 Accepts]: Start accepts. Automaton has 5652 states and 16706 transitions. Word has length 22 [2021-03-10 21:25:32,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:32,630 INFO L480 AbstractCegarLoop]: Abstraction has 5652 states and 16706 transitions. [2021-03-10 21:25:32,630 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:32,630 INFO L276 IsEmpty]: Start isEmpty. Operand 5652 states and 16706 transitions. [2021-03-10 21:25:32,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:32,634 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:32,634 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:32,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3276 [2021-03-10 21:25:32,838 INFO L428 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:32,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:32,838 INFO L82 PathProgramCache]: Analyzing trace with hash -371100689, now seen corresponding path program 268 times [2021-03-10 21:25:32,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:32,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255251074] [2021-03-10 21:25:32,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:32,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:32,919 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:32,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255251074] [2021-03-10 21:25:32,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525284977] [2021-03-10 21:25:32,920 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:32,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:25:32,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:32,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:32,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:32,989 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:32,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:32,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:25:32,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618611488] [2021-03-10 21:25:32,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:25:32,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:32,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:25:32,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:25:32,989 INFO L87 Difference]: Start difference. First operand 5652 states and 16706 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:33,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:33,254 INFO L93 Difference]: Finished difference Result 7203 states and 20623 transitions. [2021-03-10 21:25:33,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:25:33,254 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:33,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:33,261 INFO L225 Difference]: With dead ends: 7203 [2021-03-10 21:25:33,261 INFO L226 Difference]: Without dead ends: 7203 [2021-03-10 21:25:33,262 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 222.5ms TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:25:33,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7203 states. [2021-03-10 21:25:33,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7203 to 6624. [2021-03-10 21:25:33,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6624 states, 6623 states have (on average 2.953042427902763) internal successors, (19558), 6623 states have internal predecessors, (19558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:33,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6624 states to 6624 states and 19558 transitions. [2021-03-10 21:25:33,337 INFO L78 Accepts]: Start accepts. Automaton has 6624 states and 19558 transitions. Word has length 22 [2021-03-10 21:25:33,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:33,337 INFO L480 AbstractCegarLoop]: Abstraction has 6624 states and 19558 transitions. [2021-03-10 21:25:33,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:33,337 INFO L276 IsEmpty]: Start isEmpty. Operand 6624 states and 19558 transitions. [2021-03-10 21:25:33,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:33,341 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:33,341 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:33,542 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3277,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:33,542 INFO L428 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:33,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:33,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1096732975, now seen corresponding path program 269 times [2021-03-10 21:25:33,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:33,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445854385] [2021-03-10 21:25:33,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:33,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:33,596 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:33,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445854385] [2021-03-10 21:25:33,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235987674] [2021-03-10 21:25:33,596 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:33,616 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:25:33,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:33,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:33,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:33,673 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:33,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:33,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:25:33,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253715335] [2021-03-10 21:25:33,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:25:33,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:33,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:25:33,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:25:33,674 INFO L87 Difference]: Start difference. First operand 6624 states and 19558 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:33,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:33,857 INFO L93 Difference]: Finished difference Result 6862 states and 19866 transitions. [2021-03-10 21:25:33,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:25:33,858 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:33,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:33,864 INFO L225 Difference]: With dead ends: 6862 [2021-03-10 21:25:33,864 INFO L226 Difference]: Without dead ends: 6858 [2021-03-10 21:25:33,865 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 115.6ms TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:25:33,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6858 states. [2021-03-10 21:25:33,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6858 to 6638. [2021-03-10 21:25:33,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6638 states, 6637 states have (on average 2.9532921500678015) internal successors, (19601), 6637 states have internal predecessors, (19601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:33,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6638 states to 6638 states and 19601 transitions. [2021-03-10 21:25:33,944 INFO L78 Accepts]: Start accepts. Automaton has 6638 states and 19601 transitions. Word has length 22 [2021-03-10 21:25:33,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:33,944 INFO L480 AbstractCegarLoop]: Abstraction has 6638 states and 19601 transitions. [2021-03-10 21:25:33,944 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:33,944 INFO L276 IsEmpty]: Start isEmpty. Operand 6638 states and 19601 transitions. [2021-03-10 21:25:33,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:33,948 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:33,948 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:34,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3278,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:34,149 INFO L428 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:34,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:34,149 INFO L82 PathProgramCache]: Analyzing trace with hash 621016085, now seen corresponding path program 270 times [2021-03-10 21:25:34,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:34,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275737681] [2021-03-10 21:25:34,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:34,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:34,202 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:34,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275737681] [2021-03-10 21:25:34,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228146327] [2021-03-10 21:25:34,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:34,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:25:34,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:34,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:34,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:34,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:34,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:25:34,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892997070] [2021-03-10 21:25:34,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:25:34,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:34,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:25:34,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:25:34,283 INFO L87 Difference]: Start difference. First operand 6638 states and 19601 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:34,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:34,389 INFO L93 Difference]: Finished difference Result 7175 states and 20692 transitions. [2021-03-10 21:25:34,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:25:34,390 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:34,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:34,397 INFO L225 Difference]: With dead ends: 7175 [2021-03-10 21:25:34,397 INFO L226 Difference]: Without dead ends: 7175 [2021-03-10 21:25:34,397 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 82.0ms TimeCoverageRelationStatistics Valid=133, Invalid=209, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:25:34,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7175 states. [2021-03-10 21:25:34,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7175 to 6639. [2021-03-10 21:25:34,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6639 states, 6638 states have (on average 2.9528472431455257) internal successors, (19601), 6638 states have internal predecessors, (19601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:34,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6639 states to 6639 states and 19601 transitions. [2021-03-10 21:25:34,477 INFO L78 Accepts]: Start accepts. Automaton has 6639 states and 19601 transitions. Word has length 22 [2021-03-10 21:25:34,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:34,477 INFO L480 AbstractCegarLoop]: Abstraction has 6639 states and 19601 transitions. [2021-03-10 21:25:34,477 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:34,477 INFO L276 IsEmpty]: Start isEmpty. Operand 6639 states and 19601 transitions. [2021-03-10 21:25:34,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:34,482 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:34,482 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:34,683 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3279,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:34,683 INFO L428 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:34,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:34,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1108031249, now seen corresponding path program 271 times [2021-03-10 21:25:34,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:34,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289035269] [2021-03-10 21:25:34,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:34,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:34,740 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:34,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289035269] [2021-03-10 21:25:34,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973655171] [2021-03-10 21:25:34,740 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:34,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:34,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:34,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:34,807 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:34,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:34,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-03-10 21:25:34,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593357857] [2021-03-10 21:25:34,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:25:34,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:34,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:25:34,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:25:34,808 INFO L87 Difference]: Start difference. First operand 6639 states and 19601 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:34,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:34,955 INFO L93 Difference]: Finished difference Result 7416 states and 21327 transitions. [2021-03-10 21:25:34,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:25:34,956 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:34,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:34,965 INFO L225 Difference]: With dead ends: 7416 [2021-03-10 21:25:34,965 INFO L226 Difference]: Without dead ends: 7416 [2021-03-10 21:25:34,965 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 118.7ms TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:25:34,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7416 states. [2021-03-10 21:25:35,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7416 to 6639. [2021-03-10 21:25:35,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6639 states, 6638 states have (on average 2.9526965953600484) internal successors, (19600), 6638 states have internal predecessors, (19600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:35,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6639 states to 6639 states and 19600 transitions. [2021-03-10 21:25:35,066 INFO L78 Accepts]: Start accepts. Automaton has 6639 states and 19600 transitions. Word has length 22 [2021-03-10 21:25:35,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:35,066 INFO L480 AbstractCegarLoop]: Abstraction has 6639 states and 19600 transitions. [2021-03-10 21:25:35,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:35,066 INFO L276 IsEmpty]: Start isEmpty. Operand 6639 states and 19600 transitions. [2021-03-10 21:25:35,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:35,071 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:35,071 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:35,271 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3280 [2021-03-10 21:25:35,271 INFO L428 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:35,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:35,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1126076245, now seen corresponding path program 272 times [2021-03-10 21:25:35,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:35,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500168952] [2021-03-10 21:25:35,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:35,332 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:35,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500168952] [2021-03-10 21:25:35,332 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571771346] [2021-03-10 21:25:35,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:35,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:25:35,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:35,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:35,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:35,400 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 18 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:35,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:35,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:25:35,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070411822] [2021-03-10 21:25:35,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:35,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:35,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:35,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:35,400 INFO L87 Difference]: Start difference. First operand 6639 states and 19600 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:35,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:35,570 INFO L93 Difference]: Finished difference Result 7505 states and 21578 transitions. [2021-03-10 21:25:35,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:25:35,571 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:35,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:35,579 INFO L225 Difference]: With dead ends: 7505 [2021-03-10 21:25:35,579 INFO L226 Difference]: Without dead ends: 7505 [2021-03-10 21:25:35,579 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 139.2ms TimeCoverageRelationStatistics Valid=253, Invalid=449, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:25:35,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7505 states. [2021-03-10 21:25:35,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7505 to 6648. [2021-03-10 21:25:35,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6648 states, 6647 states have (on average 2.9527606438995035) internal successors, (19627), 6647 states have internal predecessors, (19627), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:35,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6648 states to 6648 states and 19627 transitions. [2021-03-10 21:25:35,658 INFO L78 Accepts]: Start accepts. Automaton has 6648 states and 19627 transitions. Word has length 22 [2021-03-10 21:25:35,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:35,658 INFO L480 AbstractCegarLoop]: Abstraction has 6648 states and 19627 transitions. [2021-03-10 21:25:35,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:35,658 INFO L276 IsEmpty]: Start isEmpty. Operand 6648 states and 19627 transitions. [2021-03-10 21:25:35,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:35,663 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:35,663 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:35,863 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3281,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:35,863 INFO L428 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:35,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:35,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1663931823, now seen corresponding path program 273 times [2021-03-10 21:25:35,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:35,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16408559] [2021-03-10 21:25:35,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:35,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:35,926 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:35,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16408559] [2021-03-10 21:25:35,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114188974] [2021-03-10 21:25:35,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:35,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:25:35,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:35,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:35,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:35,995 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:35,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:35,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-03-10 21:25:35,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622707239] [2021-03-10 21:25:35,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:25:35,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:35,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:25:35,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:25:35,996 INFO L87 Difference]: Start difference. First operand 6648 states and 19627 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:36,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:36,164 INFO L93 Difference]: Finished difference Result 8295 states and 23872 transitions. [2021-03-10 21:25:36,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:25:36,165 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:36,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:36,173 INFO L225 Difference]: With dead ends: 8295 [2021-03-10 21:25:36,173 INFO L226 Difference]: Without dead ends: 8295 [2021-03-10 21:25:36,173 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=246, Invalid=456, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:25:36,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8295 states. [2021-03-10 21:25:36,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8295 to 7544. [2021-03-10 21:25:36,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7544 states, 7543 states have (on average 2.966193822086703) internal successors, (22374), 7543 states have internal predecessors, (22374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:36,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7544 states to 7544 states and 22374 transitions. [2021-03-10 21:25:36,262 INFO L78 Accepts]: Start accepts. Automaton has 7544 states and 22374 transitions. Word has length 22 [2021-03-10 21:25:36,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:36,262 INFO L480 AbstractCegarLoop]: Abstraction has 7544 states and 22374 transitions. [2021-03-10 21:25:36,262 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:36,262 INFO L276 IsEmpty]: Start isEmpty. Operand 7544 states and 22374 transitions. [2021-03-10 21:25:36,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:36,268 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:36,268 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:36,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3282,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:36,469 INFO L428 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:36,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:36,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1157585557, now seen corresponding path program 274 times [2021-03-10 21:25:36,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:36,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535704016] [2021-03-10 21:25:36,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:36,548 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:36,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535704016] [2021-03-10 21:25:36,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017975715] [2021-03-10 21:25:36,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:36,567 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:25:36,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:36,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:36,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:36,616 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:36,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:36,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:25:36,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539170290] [2021-03-10 21:25:36,617 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:36,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:36,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:36,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:36,617 INFO L87 Difference]: Start difference. First operand 7544 states and 22374 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:36,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:36,777 INFO L93 Difference]: Finished difference Result 8145 states and 23520 transitions. [2021-03-10 21:25:36,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:25:36,777 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:36,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:36,787 INFO L225 Difference]: With dead ends: 8145 [2021-03-10 21:25:36,787 INFO L226 Difference]: Without dead ends: 8145 [2021-03-10 21:25:36,788 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 141.6ms TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:25:36,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8145 states. [2021-03-10 21:25:36,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8145 to 7488. [2021-03-10 21:25:36,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7488 states, 7487 states have (on average 2.9648724455723254) internal successors, (22198), 7487 states have internal predecessors, (22198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:36,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7488 states to 7488 states and 22198 transitions. [2021-03-10 21:25:36,876 INFO L78 Accepts]: Start accepts. Automaton has 7488 states and 22198 transitions. Word has length 22 [2021-03-10 21:25:36,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:36,876 INFO L480 AbstractCegarLoop]: Abstraction has 7488 states and 22198 transitions. [2021-03-10 21:25:36,876 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:36,877 INFO L276 IsEmpty]: Start isEmpty. Operand 7488 states and 22198 transitions. [2021-03-10 21:25:36,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:36,882 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:36,882 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:37,082 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3283 [2021-03-10 21:25:37,082 INFO L428 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:37,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:37,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1654246801, now seen corresponding path program 275 times [2021-03-10 21:25:37,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:37,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237563412] [2021-03-10 21:25:37,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:37,155 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:37,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237563412] [2021-03-10 21:25:37,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017138534] [2021-03-10 21:25:37,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:37,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:25:37,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:37,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:37,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:37,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:37,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:25:37,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768245281] [2021-03-10 21:25:37,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:37,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:37,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:37,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:37,262 INFO L87 Difference]: Start difference. First operand 7488 states and 22198 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:37,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:37,403 INFO L93 Difference]: Finished difference Result 9477 states and 27589 transitions. [2021-03-10 21:25:37,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:25:37,404 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:37,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:37,414 INFO L225 Difference]: With dead ends: 9477 [2021-03-10 21:25:37,414 INFO L226 Difference]: Without dead ends: 9477 [2021-03-10 21:25:37,414 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 129.2ms TimeCoverageRelationStatistics Valid=169, Invalid=383, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:25:37,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9477 states. [2021-03-10 21:25:37,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9477 to 8935. [2021-03-10 21:25:37,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8935 states, 8934 states have (on average 2.9705618983657938) internal successors, (26539), 8934 states have internal predecessors, (26539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:37,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8935 states to 8935 states and 26539 transitions. [2021-03-10 21:25:37,514 INFO L78 Accepts]: Start accepts. Automaton has 8935 states and 26539 transitions. Word has length 22 [2021-03-10 21:25:37,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:37,514 INFO L480 AbstractCegarLoop]: Abstraction has 8935 states and 26539 transitions. [2021-03-10 21:25:37,514 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:37,514 INFO L276 IsEmpty]: Start isEmpty. Operand 8935 states and 26539 transitions. [2021-03-10 21:25:37,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:37,521 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:37,521 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:37,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3284 [2021-03-10 21:25:37,721 INFO L428 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:37,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:37,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1373263317, now seen corresponding path program 276 times [2021-03-10 21:25:37,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:37,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227969174] [2021-03-10 21:25:37,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:37,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:37,803 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:37,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227969174] [2021-03-10 21:25:37,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164096113] [2021-03-10 21:25:37,804 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:37,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:25:37,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:37,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:37,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:37,916 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:37,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:37,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:25:37,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694347939] [2021-03-10 21:25:37,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:25:37,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:37,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:25:37,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:25:37,917 INFO L87 Difference]: Start difference. First operand 8935 states and 26539 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:38,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:38,151 INFO L93 Difference]: Finished difference Result 9543 states and 27760 transitions. [2021-03-10 21:25:38,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:25:38,152 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:38,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:38,163 INFO L225 Difference]: With dead ends: 9543 [2021-03-10 21:25:38,163 INFO L226 Difference]: Without dead ends: 9543 [2021-03-10 21:25:38,164 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 197.8ms TimeCoverageRelationStatistics Valid=322, Invalid=670, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:25:38,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9543 states. [2021-03-10 21:25:38,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9543 to 8928. [2021-03-10 21:25:38,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8928 states, 8927 states have (on average 2.9704267951159404) internal successors, (26517), 8927 states have internal predecessors, (26517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:38,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8928 states to 8928 states and 26517 transitions. [2021-03-10 21:25:38,271 INFO L78 Accepts]: Start accepts. Automaton has 8928 states and 26517 transitions. Word has length 22 [2021-03-10 21:25:38,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:38,271 INFO L480 AbstractCegarLoop]: Abstraction has 8928 states and 26517 transitions. [2021-03-10 21:25:38,271 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:38,271 INFO L276 IsEmpty]: Start isEmpty. Operand 8928 states and 26517 transitions. [2021-03-10 21:25:38,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:38,278 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:38,278 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:38,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3285 [2021-03-10 21:25:38,479 INFO L428 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:38,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:38,479 INFO L82 PathProgramCache]: Analyzing trace with hash 736796463, now seen corresponding path program 277 times [2021-03-10 21:25:38,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:38,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463171839] [2021-03-10 21:25:38,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:38,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:38,566 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:38,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463171839] [2021-03-10 21:25:38,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741832603] [2021-03-10 21:25:38,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:38,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:38,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:38,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:38,636 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:38,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:38,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:25:38,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393826942] [2021-03-10 21:25:38,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:25:38,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:38,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:25:38,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:25:38,637 INFO L87 Difference]: Start difference. First operand 8928 states and 26517 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:38,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:38,965 INFO L93 Difference]: Finished difference Result 10324 states and 30070 transitions. [2021-03-10 21:25:38,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:25:38,965 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:38,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:38,976 INFO L225 Difference]: With dead ends: 10324 [2021-03-10 21:25:38,977 INFO L226 Difference]: Without dead ends: 10324 [2021-03-10 21:25:38,977 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 287.2ms TimeCoverageRelationStatistics Valid=551, Invalid=1089, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:25:38,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10324 states. [2021-03-10 21:25:39,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10324 to 9639. [2021-03-10 21:25:39,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9639 states, 9638 states have (on average 2.9726084249844367) internal successors, (28650), 9638 states have internal predecessors, (28650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:39,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9639 states to 9639 states and 28650 transitions. [2021-03-10 21:25:39,101 INFO L78 Accepts]: Start accepts. Automaton has 9639 states and 28650 transitions. Word has length 22 [2021-03-10 21:25:39,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:39,101 INFO L480 AbstractCegarLoop]: Abstraction has 9639 states and 28650 transitions. [2021-03-10 21:25:39,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 16 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:39,101 INFO L276 IsEmpty]: Start isEmpty. Operand 9639 states and 28650 transitions. [2021-03-10 21:25:39,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:39,109 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:39,109 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:39,309 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3286,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:39,310 INFO L428 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:39,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:39,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1039148775, now seen corresponding path program 278 times [2021-03-10 21:25:39,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:39,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475257937] [2021-03-10 21:25:39,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:39,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:39,407 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:39,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475257937] [2021-03-10 21:25:39,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514069233] [2021-03-10 21:25:39,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:39,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:25:39,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:39,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:39,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:39,471 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:39,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:39,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-03-10 21:25:39,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231250289] [2021-03-10 21:25:39,472 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:25:39,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:39,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:25:39,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:25:39,472 INFO L87 Difference]: Start difference. First operand 9639 states and 28650 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:39,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:39,770 INFO L93 Difference]: Finished difference Result 9988 states and 29135 transitions. [2021-03-10 21:25:39,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:25:39,771 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:39,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:39,782 INFO L225 Difference]: With dead ends: 9988 [2021-03-10 21:25:39,782 INFO L226 Difference]: Without dead ends: 9980 [2021-03-10 21:25:39,783 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 238.4ms TimeCoverageRelationStatistics Valid=354, Invalid=702, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:25:39,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9980 states. [2021-03-10 21:25:39,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9980 to 9589. [2021-03-10 21:25:39,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9589 states, 9588 states have (on average 2.9695452649144762) internal successors, (28472), 9588 states have internal predecessors, (28472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:39,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9589 states to 9589 states and 28472 transitions. [2021-03-10 21:25:39,909 INFO L78 Accepts]: Start accepts. Automaton has 9589 states and 28472 transitions. Word has length 22 [2021-03-10 21:25:39,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:39,909 INFO L480 AbstractCegarLoop]: Abstraction has 9589 states and 28472 transitions. [2021-03-10 21:25:39,909 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:39,909 INFO L276 IsEmpty]: Start isEmpty. Operand 9589 states and 28472 transitions. [2021-03-10 21:25:39,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:39,917 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:39,917 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:40,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3287 [2021-03-10 21:25:40,117 INFO L428 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:40,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:40,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1158733017, now seen corresponding path program 279 times [2021-03-10 21:25:40,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:40,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444162628] [2021-03-10 21:25:40,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:40,215 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:40,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444162628] [2021-03-10 21:25:40,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769994334] [2021-03-10 21:25:40,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:40,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:25:40,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:40,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:40,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:40,294 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:40,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:40,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-03-10 21:25:40,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162668686] [2021-03-10 21:25:40,295 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:25:40,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:40,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:25:40,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:25:40,295 INFO L87 Difference]: Start difference. First operand 9589 states and 28472 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:40,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:40,699 INFO L93 Difference]: Finished difference Result 11995 states and 35313 transitions. [2021-03-10 21:25:40,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:25:40,739 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:40,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:40,752 INFO L225 Difference]: With dead ends: 11995 [2021-03-10 21:25:40,753 INFO L226 Difference]: Without dead ends: 11995 [2021-03-10 21:25:40,753 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 359.9ms TimeCoverageRelationStatistics Valid=699, Invalid=1371, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 21:25:40,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11995 states. [2021-03-10 21:25:40,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11995 to 9342. [2021-03-10 21:25:40,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9342 states, 9341 states have (on average 2.9680976340862864) internal successors, (27725), 9341 states have internal predecessors, (27725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:40,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9342 states to 9342 states and 27725 transitions. [2021-03-10 21:25:40,905 INFO L78 Accepts]: Start accepts. Automaton has 9342 states and 27725 transitions. Word has length 22 [2021-03-10 21:25:40,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:40,905 INFO L480 AbstractCegarLoop]: Abstraction has 9342 states and 27725 transitions. [2021-03-10 21:25:40,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:40,905 INFO L276 IsEmpty]: Start isEmpty. Operand 9342 states and 27725 transitions. [2021-03-10 21:25:40,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:40,912 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:40,912 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:41,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3288,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:41,122 INFO L428 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:41,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:41,122 INFO L82 PathProgramCache]: Analyzing trace with hash 876299495, now seen corresponding path program 280 times [2021-03-10 21:25:41,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:41,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879615701] [2021-03-10 21:25:41,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:41,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:41,201 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:41,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879615701] [2021-03-10 21:25:41,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846222145] [2021-03-10 21:25:41,202 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:41,223 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:25:41,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:41,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:41,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:41,304 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:41,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:41,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2021-03-10 21:25:41,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476623774] [2021-03-10 21:25:41,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:25:41,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:41,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:25:41,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:25:41,305 INFO L87 Difference]: Start difference. First operand 9342 states and 27725 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:41,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:41,693 INFO L93 Difference]: Finished difference Result 9981 states and 29225 transitions. [2021-03-10 21:25:41,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:25:41,694 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:41,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:41,709 INFO L225 Difference]: With dead ends: 9981 [2021-03-10 21:25:41,710 INFO L226 Difference]: Without dead ends: 9981 [2021-03-10 21:25:41,710 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 317.1ms TimeCoverageRelationStatistics Valid=401, Invalid=789, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:25:41,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9981 states. [2021-03-10 21:25:41,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9981 to 9425. [2021-03-10 21:25:41,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9425 states, 9424 states have (on average 2.9691213921901527) internal successors, (27981), 9424 states have internal predecessors, (27981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:41,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9425 states to 9425 states and 27981 transitions. [2021-03-10 21:25:41,850 INFO L78 Accepts]: Start accepts. Automaton has 9425 states and 27981 transitions. Word has length 22 [2021-03-10 21:25:41,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:41,850 INFO L480 AbstractCegarLoop]: Abstraction has 9425 states and 27981 transitions. [2021-03-10 21:25:41,850 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:41,850 INFO L276 IsEmpty]: Start isEmpty. Operand 9425 states and 27981 transitions. [2021-03-10 21:25:41,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:41,857 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:41,857 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:42,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3289,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:42,058 INFO L428 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:42,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:42,058 INFO L82 PathProgramCache]: Analyzing trace with hash 369953229, now seen corresponding path program 281 times [2021-03-10 21:25:42,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:42,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111902121] [2021-03-10 21:25:42,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:42,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:42,160 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:42,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111902121] [2021-03-10 21:25:42,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202745619] [2021-03-10 21:25:42,161 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:42,187 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:25:42,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:42,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:42,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:42,248 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 17 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:42,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:42,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-03-10 21:25:42,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042615194] [2021-03-10 21:25:42,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:25:42,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:42,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:25:42,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:25:42,249 INFO L87 Difference]: Start difference. First operand 9425 states and 27981 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:42,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:42,525 INFO L93 Difference]: Finished difference Result 9826 states and 28836 transitions. [2021-03-10 21:25:42,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:25:42,526 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:42,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:42,537 INFO L225 Difference]: With dead ends: 9826 [2021-03-10 21:25:42,537 INFO L226 Difference]: Without dead ends: 9826 [2021-03-10 21:25:42,537 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 286 ImplicationChecksByTransitivity, 272.6ms TimeCoverageRelationStatistics Valid=422, Invalid=838, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:25:42,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9826 states. [2021-03-10 21:25:42,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9826 to 8609. [2021-03-10 21:25:42,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8609 states, 8608 states have (on average 2.963638475836431) internal successors, (25511), 8608 states have internal predecessors, (25511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:42,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8609 states to 8609 states and 25511 transitions. [2021-03-10 21:25:42,641 INFO L78 Accepts]: Start accepts. Automaton has 8609 states and 25511 transitions. Word has length 22 [2021-03-10 21:25:42,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:42,641 INFO L480 AbstractCegarLoop]: Abstraction has 8609 states and 25511 transitions. [2021-03-10 21:25:42,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:42,641 INFO L276 IsEmpty]: Start isEmpty. Operand 8609 states and 25511 transitions. [2021-03-10 21:25:42,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:42,648 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:42,648 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:42,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3290 [2021-03-10 21:25:42,849 INFO L428 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:42,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:42,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1853088167, now seen corresponding path program 282 times [2021-03-10 21:25:42,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:42,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046219799] [2021-03-10 21:25:42,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:42,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:42,930 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:42,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046219799] [2021-03-10 21:25:42,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324579572] [2021-03-10 21:25:42,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:42,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:25:42,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:42,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:42,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:43,018 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:43,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:43,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2021-03-10 21:25:43,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434027070] [2021-03-10 21:25:43,019 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:25:43,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:43,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:25:43,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:25:43,019 INFO L87 Difference]: Start difference. First operand 8609 states and 25511 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:43,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:43,269 INFO L93 Difference]: Finished difference Result 9527 states and 27764 transitions. [2021-03-10 21:25:43,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:25:43,269 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:43,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:43,280 INFO L225 Difference]: With dead ends: 9527 [2021-03-10 21:25:43,280 INFO L226 Difference]: Without dead ends: 9527 [2021-03-10 21:25:43,280 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 231.5ms TimeCoverageRelationStatistics Valid=302, Invalid=690, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:25:43,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9527 states. [2021-03-10 21:25:43,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9527 to 9038. [2021-03-10 21:25:43,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9038 states, 9037 states have (on average 2.9622662387960608) internal successors, (26770), 9037 states have internal predecessors, (26770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:43,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9038 states to 9038 states and 26770 transitions. [2021-03-10 21:25:43,383 INFO L78 Accepts]: Start accepts. Automaton has 9038 states and 26770 transitions. Word has length 22 [2021-03-10 21:25:43,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:43,383 INFO L480 AbstractCegarLoop]: Abstraction has 9038 states and 26770 transitions. [2021-03-10 21:25:43,383 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:43,383 INFO L276 IsEmpty]: Start isEmpty. Operand 9038 states and 26770 transitions. [2021-03-10 21:25:43,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:43,390 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:43,390 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:43,590 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3291,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:43,590 INFO L428 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:43,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:43,590 INFO L82 PathProgramCache]: Analyzing trace with hash 585630989, now seen corresponding path program 283 times [2021-03-10 21:25:43,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:43,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114195716] [2021-03-10 21:25:43,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:43,685 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:43,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114195716] [2021-03-10 21:25:43,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420106620] [2021-03-10 21:25:43,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:43,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:43,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:43,764 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:43,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:43,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-03-10 21:25:43,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532916033] [2021-03-10 21:25:43,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:25:43,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:43,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:25:43,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:25:43,765 INFO L87 Difference]: Start difference. First operand 9038 states and 26770 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:44,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:44,156 INFO L93 Difference]: Finished difference Result 9636 states and 28011 transitions. [2021-03-10 21:25:44,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:25:44,157 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:44,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:44,168 INFO L225 Difference]: With dead ends: 9636 [2021-03-10 21:25:44,168 INFO L226 Difference]: Without dead ends: 9636 [2021-03-10 21:25:44,168 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 347.2ms TimeCoverageRelationStatistics Valid=626, Invalid=1266, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 21:25:44,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9636 states. [2021-03-10 21:25:44,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9636 to 8808. [2021-03-10 21:25:44,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8808 states, 8807 states have (on average 2.9608266151924605) internal successors, (26076), 8807 states have internal predecessors, (26076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:44,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8808 states to 8808 states and 26076 transitions. [2021-03-10 21:25:44,300 INFO L78 Accepts]: Start accepts. Automaton has 8808 states and 26076 transitions. Word has length 22 [2021-03-10 21:25:44,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:44,300 INFO L480 AbstractCegarLoop]: Abstraction has 8808 states and 26076 transitions. [2021-03-10 21:25:44,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:44,300 INFO L276 IsEmpty]: Start isEmpty. Operand 8808 states and 26076 transitions. [2021-03-10 21:25:44,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:44,307 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:44,307 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:44,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3292 [2021-03-10 21:25:44,507 INFO L428 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:44,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:44,508 INFO L82 PathProgramCache]: Analyzing trace with hash -50835865, now seen corresponding path program 284 times [2021-03-10 21:25:44,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:44,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351938769] [2021-03-10 21:25:44,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:44,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351938769] [2021-03-10 21:25:44,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161565586] [2021-03-10 21:25:44,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:44,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:25:44,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:44,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:44,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:44,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:44,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-03-10 21:25:44,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701454773] [2021-03-10 21:25:44,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:25:44,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:44,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:25:44,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:25:44,694 INFO L87 Difference]: Start difference. First operand 8808 states and 26076 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:45,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:45,134 INFO L93 Difference]: Finished difference Result 9760 states and 28323 transitions. [2021-03-10 21:25:45,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 21:25:45,134 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:45,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:45,144 INFO L225 Difference]: With dead ends: 9760 [2021-03-10 21:25:45,144 INFO L226 Difference]: Without dead ends: 9760 [2021-03-10 21:25:45,145 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 390.0ms TimeCoverageRelationStatistics Valid=708, Invalid=1454, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 21:25:45,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9760 states. [2021-03-10 21:25:45,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9760 to 8633. [2021-03-10 21:25:45,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8633 states, 8632 states have (on average 2.9661723818350323) internal successors, (25604), 8632 states have internal predecessors, (25604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:45,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8633 states to 8633 states and 25604 transitions. [2021-03-10 21:25:45,245 INFO L78 Accepts]: Start accepts. Automaton has 8633 states and 25604 transitions. Word has length 22 [2021-03-10 21:25:45,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:45,245 INFO L480 AbstractCegarLoop]: Abstraction has 8633 states and 25604 transitions. [2021-03-10 21:25:45,245 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:45,245 INFO L276 IsEmpty]: Start isEmpty. Operand 8633 states and 25604 transitions. [2021-03-10 21:25:45,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:45,252 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:45,252 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:45,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3293 [2021-03-10 21:25:45,453 INFO L428 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:45,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:45,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1859354147, now seen corresponding path program 285 times [2021-03-10 21:25:45,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:45,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791476155] [2021-03-10 21:25:45,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:45,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:45,546 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:45,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791476155] [2021-03-10 21:25:45,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018627242] [2021-03-10 21:25:45,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:45,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:25:45,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:45,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:45,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:45,629 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:45,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:45,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 16 [2021-03-10 21:25:45,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832201663] [2021-03-10 21:25:45,629 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:25:45,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:45,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:25:45,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=180, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:25:45,629 INFO L87 Difference]: Start difference. First operand 8633 states and 25604 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:45,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:45,884 INFO L93 Difference]: Finished difference Result 8906 states and 25958 transitions. [2021-03-10 21:25:45,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:25:45,885 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:45,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:45,895 INFO L225 Difference]: With dead ends: 8906 [2021-03-10 21:25:45,895 INFO L226 Difference]: Without dead ends: 8900 [2021-03-10 21:25:45,895 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 217.3ms TimeCoverageRelationStatistics Valid=307, Invalid=623, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:25:45,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8900 states. [2021-03-10 21:25:45,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8900 to 8631. [2021-03-10 21:25:45,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8631 states, 8630 states have (on average 2.9648899188876014) internal successors, (25587), 8630 states have internal predecessors, (25587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:46,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8631 states to 8631 states and 25587 transitions. [2021-03-10 21:25:46,003 INFO L78 Accepts]: Start accepts. Automaton has 8631 states and 25587 transitions. Word has length 22 [2021-03-10 21:25:46,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:46,003 INFO L480 AbstractCegarLoop]: Abstraction has 8631 states and 25587 transitions. [2021-03-10 21:25:46,003 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:46,003 INFO L276 IsEmpty]: Start isEmpty. Operand 8631 states and 25587 transitions. [2021-03-10 21:25:46,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:46,010 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:46,010 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:46,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3294,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:46,210 INFO L428 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:46,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:46,210 INFO L82 PathProgramCache]: Analyzing trace with hash -903090687, now seen corresponding path program 286 times [2021-03-10 21:25:46,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:46,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087481280] [2021-03-10 21:25:46,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:46,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:46,292 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:46,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087481280] [2021-03-10 21:25:46,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788201136] [2021-03-10 21:25:46,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:46,311 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:25:46,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:46,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:46,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:46,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:46,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 17 [2021-03-10 21:25:46,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075972394] [2021-03-10 21:25:46,380 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:25:46,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:46,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:25:46,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:25:46,380 INFO L87 Difference]: Start difference. First operand 8631 states and 25587 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:46,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:46,625 INFO L93 Difference]: Finished difference Result 9990 states and 29311 transitions. [2021-03-10 21:25:46,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:25:46,626 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:46,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:46,637 INFO L225 Difference]: With dead ends: 9990 [2021-03-10 21:25:46,637 INFO L226 Difference]: Without dead ends: 9990 [2021-03-10 21:25:46,637 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 230.7ms TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:25:46,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9990 states. [2021-03-10 21:25:46,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9990 to 9751. [2021-03-10 21:25:46,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9751 states, 9750 states have (on average 2.9663589743589744) internal successors, (28922), 9750 states have internal predecessors, (28922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:46,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9751 states to 9751 states and 28922 transitions. [2021-03-10 21:25:46,749 INFO L78 Accepts]: Start accepts. Automaton has 9751 states and 28922 transitions. Word has length 22 [2021-03-10 21:25:46,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:46,750 INFO L480 AbstractCegarLoop]: Abstraction has 9751 states and 28922 transitions. [2021-03-10 21:25:46,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:46,750 INFO L276 IsEmpty]: Start isEmpty. Operand 9751 states and 28922 transitions. [2021-03-10 21:25:46,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:46,758 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:46,758 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:46,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3295 [2021-03-10 21:25:46,958 INFO L428 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:46,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:46,958 INFO L82 PathProgramCache]: Analyzing trace with hash 2124419431, now seen corresponding path program 287 times [2021-03-10 21:25:46,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:46,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401566458] [2021-03-10 21:25:46,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:46,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:47,050 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:47,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401566458] [2021-03-10 21:25:47,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954253162] [2021-03-10 21:25:47,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:47,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:25:47,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:47,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:47,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:47,138 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 16 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:47,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:47,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-03-10 21:25:47,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626345180] [2021-03-10 21:25:47,138 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:25:47,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:47,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:25:47,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:25:47,139 INFO L87 Difference]: Start difference. First operand 9751 states and 28922 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:47,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:47,496 INFO L93 Difference]: Finished difference Result 10086 states and 29515 transitions. [2021-03-10 21:25:47,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:25:47,497 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:47,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:47,508 INFO L225 Difference]: With dead ends: 10086 [2021-03-10 21:25:47,508 INFO L226 Difference]: Without dead ends: 10086 [2021-03-10 21:25:47,508 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 324.3ms TimeCoverageRelationStatistics Valid=548, Invalid=1174, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:25:47,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10086 states. [2021-03-10 21:25:47,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10086 to 9761. [2021-03-10 21:25:47,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9761 states, 9760 states have (on average 2.966393442622951) internal successors, (28952), 9760 states have internal predecessors, (28952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:47,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9761 states to 9761 states and 28952 transitions. [2021-03-10 21:25:47,662 INFO L78 Accepts]: Start accepts. Automaton has 9761 states and 28952 transitions. Word has length 22 [2021-03-10 21:25:47,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:47,662 INFO L480 AbstractCegarLoop]: Abstraction has 9761 states and 28952 transitions. [2021-03-10 21:25:47,663 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:47,663 INFO L276 IsEmpty]: Start isEmpty. Operand 9761 states and 28952 transitions. [2021-03-10 21:25:47,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:47,671 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:47,671 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:47,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3296,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:47,871 INFO L428 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:47,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:47,872 INFO L82 PathProgramCache]: Analyzing trace with hash 1487952577, now seen corresponding path program 288 times [2021-03-10 21:25:47,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:47,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135266357] [2021-03-10 21:25:47,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:47,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:47,970 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:47,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135266357] [2021-03-10 21:25:47,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34298178] [2021-03-10 21:25:47,970 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:47,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:25:47,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:47,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:47,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:48,063 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:48,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:48,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 18 [2021-03-10 21:25:48,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529931051] [2021-03-10 21:25:48,064 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:25:48,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:48,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:25:48,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:25:48,064 INFO L87 Difference]: Start difference. First operand 9761 states and 28952 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:48,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:48,488 INFO L93 Difference]: Finished difference Result 11404 states and 33374 transitions. [2021-03-10 21:25:48,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 21:25:48,489 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:48,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:48,501 INFO L225 Difference]: With dead ends: 11404 [2021-03-10 21:25:48,501 INFO L226 Difference]: Without dead ends: 11404 [2021-03-10 21:25:48,501 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 379.4ms TimeCoverageRelationStatistics Valid=666, Invalid=1404, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 21:25:48,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11404 states. [2021-03-10 21:25:48,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11404 to 10779. [2021-03-10 21:25:48,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10779 states, 10778 states have (on average 2.9689181666357394) internal successors, (31999), 10778 states have internal predecessors, (31999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:48,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10779 states to 10779 states and 31999 transitions. [2021-03-10 21:25:48,634 INFO L78 Accepts]: Start accepts. Automaton has 10779 states and 31999 transitions. Word has length 22 [2021-03-10 21:25:48,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:48,634 INFO L480 AbstractCegarLoop]: Abstraction has 10779 states and 31999 transitions. [2021-03-10 21:25:48,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:48,635 INFO L276 IsEmpty]: Start isEmpty. Operand 10779 states and 31999 transitions. [2021-03-10 21:25:48,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:48,643 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:48,643 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:48,843 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3297 [2021-03-10 21:25:48,843 INFO L428 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:48,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:48,843 INFO L82 PathProgramCache]: Analyzing trace with hash -53850265, now seen corresponding path program 289 times [2021-03-10 21:25:48,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:48,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046732254] [2021-03-10 21:25:48,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:48,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:48,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046732254] [2021-03-10 21:25:48,936 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815825491] [2021-03-10 21:25:48,936 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:48,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:48,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:49,000 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 9 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:49,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:49,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 16 [2021-03-10 21:25:49,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174737670] [2021-03-10 21:25:49,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:25:49,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:49,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:25:49,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:25:49,001 INFO L87 Difference]: Start difference. First operand 10779 states and 31999 transitions. Second operand has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:49,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:49,258 INFO L93 Difference]: Finished difference Result 10976 states and 32234 transitions. [2021-03-10 21:25:49,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:25:49,259 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:49,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:49,271 INFO L225 Difference]: With dead ends: 10976 [2021-03-10 21:25:49,271 INFO L226 Difference]: Without dead ends: 10972 [2021-03-10 21:25:49,272 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 190.0ms TimeCoverageRelationStatistics Valid=266, Invalid=546, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:25:49,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10972 states. [2021-03-10 21:25:49,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10972 to 10779. [2021-03-10 21:25:49,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10779 states, 10778 states have (on average 2.9686398218593433) internal successors, (31996), 10778 states have internal predecessors, (31996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:49,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10779 states to 10779 states and 31996 transitions. [2021-03-10 21:25:49,404 INFO L78 Accepts]: Start accepts. Automaton has 10779 states and 31996 transitions. Word has length 22 [2021-03-10 21:25:49,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:49,404 INFO L480 AbstractCegarLoop]: Abstraction has 10779 states and 31996 transitions. [2021-03-10 21:25:49,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 16 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:49,404 INFO L276 IsEmpty]: Start isEmpty. Operand 10779 states and 31996 transitions. [2021-03-10 21:25:49,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:49,413 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:49,413 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:49,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 291 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3298 [2021-03-10 21:25:49,613 INFO L428 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:49,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:49,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1510450393, now seen corresponding path program 290 times [2021-03-10 21:25:49,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:49,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647147577] [2021-03-10 21:25:49,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 7 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:49,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647147577] [2021-03-10 21:25:49,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921159982] [2021-03-10 21:25:49,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:49,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:25:49,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:49,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:49,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:49,812 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:49,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:49,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 19 [2021-03-10 21:25:49,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781636834] [2021-03-10 21:25:49,813 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:25:49,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:49,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:25:49,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:25:49,813 INFO L87 Difference]: Start difference. First operand 10779 states and 31996 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:50,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:50,178 INFO L93 Difference]: Finished difference Result 13145 states and 38658 transitions. [2021-03-10 21:25:50,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:25:50,179 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:50,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:50,194 INFO L225 Difference]: With dead ends: 13145 [2021-03-10 21:25:50,194 INFO L226 Difference]: Without dead ends: 13145 [2021-03-10 21:25:50,194 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 345.5ms TimeCoverageRelationStatistics Valid=549, Invalid=1257, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:25:50,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13145 states. [2021-03-10 21:25:50,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13145 to 12431. [2021-03-10 21:25:50,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12431 states, 12430 states have (on average 2.9723250201126308) internal successors, (36946), 12430 states have internal predecessors, (36946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:50,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12431 states to 12431 states and 36946 transitions. [2021-03-10 21:25:50,346 INFO L78 Accepts]: Start accepts. Automaton has 12431 states and 36946 transitions. Word has length 22 [2021-03-10 21:25:50,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:50,346 INFO L480 AbstractCegarLoop]: Abstraction has 12431 states and 36946 transitions. [2021-03-10 21:25:50,346 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:50,346 INFO L276 IsEmpty]: Start isEmpty. Operand 12431 states and 36946 transitions. [2021-03-10 21:25:50,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:50,354 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:50,354 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:50,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3299,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:50,555 INFO L428 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:50,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:50,555 INFO L82 PathProgramCache]: Analyzing trace with hash -808303197, now seen corresponding path program 291 times [2021-03-10 21:25:50,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:50,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300495523] [2021-03-10 21:25:50,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:50,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:50,660 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:50,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300495523] [2021-03-10 21:25:50,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863778285] [2021-03-10 21:25:50,661 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:50,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:25:50,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:50,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:50,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:50,738 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:50,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:50,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 16 [2021-03-10 21:25:50,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170627210] [2021-03-10 21:25:50,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:25:50,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:50,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:25:50,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:25:50,739 INFO L87 Difference]: Start difference. First operand 12431 states and 36946 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:50,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:50,976 INFO L93 Difference]: Finished difference Result 12636 states and 37217 transitions. [2021-03-10 21:25:50,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:25:50,976 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:50,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:50,990 INFO L225 Difference]: With dead ends: 12636 [2021-03-10 21:25:50,991 INFO L226 Difference]: Without dead ends: 12634 [2021-03-10 21:25:50,991 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 175.9ms TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:25:50,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12634 states. [2021-03-10 21:25:51,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12634 to 12451. [2021-03-10 21:25:51,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12451 states, 12450 states have (on average 2.972690763052209) internal successors, (37010), 12450 states have internal predecessors, (37010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:51,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12451 states to 12451 states and 37010 transitions. [2021-03-10 21:25:51,180 INFO L78 Accepts]: Start accepts. Automaton has 12451 states and 37010 transitions. Word has length 22 [2021-03-10 21:25:51,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:51,180 INFO L480 AbstractCegarLoop]: Abstraction has 12451 states and 37010 transitions. [2021-03-10 21:25:51,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:51,180 INFO L276 IsEmpty]: Start isEmpty. Operand 12451 states and 37010 transitions. [2021-03-10 21:25:51,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:51,189 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:51,189 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:51,389 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3300,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:51,390 INFO L428 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:51,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:51,390 INFO L82 PathProgramCache]: Analyzing trace with hash 909445863, now seen corresponding path program 292 times [2021-03-10 21:25:51,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:51,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312169260] [2021-03-10 21:25:51,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:51,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:51,483 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:51,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312169260] [2021-03-10 21:25:51,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001528369] [2021-03-10 21:25:51,483 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:51,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:25:51,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:51,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:51,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:51,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:51,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11] total 16 [2021-03-10 21:25:51,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26610024] [2021-03-10 21:25:51,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:25:51,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:51,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:25:51,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:25:51,556 INFO L87 Difference]: Start difference. First operand 12451 states and 37010 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:51,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:51,755 INFO L93 Difference]: Finished difference Result 13016 states and 38296 transitions. [2021-03-10 21:25:51,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:25:51,756 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:51,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:51,772 INFO L225 Difference]: With dead ends: 13016 [2021-03-10 21:25:51,772 INFO L226 Difference]: Without dead ends: 13016 [2021-03-10 21:25:51,772 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 186.0ms TimeCoverageRelationStatistics Valid=266, Invalid=546, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:25:51,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13016 states. [2021-03-10 21:25:51,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13016 to 12452. [2021-03-10 21:25:51,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12452 states, 12451 states have (on average 2.9725323267207453) internal successors, (37011), 12451 states have internal predecessors, (37011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:51,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12452 states to 12452 states and 37011 transitions. [2021-03-10 21:25:51,938 INFO L78 Accepts]: Start accepts. Automaton has 12452 states and 37011 transitions. Word has length 22 [2021-03-10 21:25:51,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:51,938 INFO L480 AbstractCegarLoop]: Abstraction has 12452 states and 37011 transitions. [2021-03-10 21:25:51,938 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:51,938 INFO L276 IsEmpty]: Start isEmpty. Operand 12452 states and 37011 transitions. [2021-03-10 21:25:51,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:51,948 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:51,948 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:52,148 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3301,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:52,148 INFO L428 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:52,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:52,148 INFO L82 PathProgramCache]: Analyzing trace with hash -819601471, now seen corresponding path program 293 times [2021-03-10 21:25:52,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:52,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126460121] [2021-03-10 21:25:52,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:52,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:52,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126460121] [2021-03-10 21:25:52,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401093447] [2021-03-10 21:25:52,242 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:52,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:25:52,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:52,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:52,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:52,328 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:52,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:52,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 17 [2021-03-10 21:25:52,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309912582] [2021-03-10 21:25:52,329 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:25:52,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:52,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:25:52,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:25:52,329 INFO L87 Difference]: Start difference. First operand 12452 states and 37011 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:52,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:52,578 INFO L93 Difference]: Finished difference Result 13404 states and 39370 transitions. [2021-03-10 21:25:52,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:25:52,579 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:52,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:52,595 INFO L225 Difference]: With dead ends: 13404 [2021-03-10 21:25:52,595 INFO L226 Difference]: Without dead ends: 13404 [2021-03-10 21:25:52,595 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 239.6ms TimeCoverageRelationStatistics Valid=375, Invalid=815, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:25:52,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13404 states. [2021-03-10 21:25:52,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13404 to 12456. [2021-03-10 21:25:52,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12456 states, 12455 states have (on average 2.972380570052188) internal successors, (37021), 12455 states have internal predecessors, (37021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:52,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12456 states to 12456 states and 37021 transitions. [2021-03-10 21:25:52,760 INFO L78 Accepts]: Start accepts. Automaton has 12456 states and 37021 transitions. Word has length 22 [2021-03-10 21:25:52,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:52,760 INFO L480 AbstractCegarLoop]: Abstraction has 12456 states and 37021 transitions. [2021-03-10 21:25:52,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:52,760 INFO L276 IsEmpty]: Start isEmpty. Operand 12456 states and 37021 transitions. [2021-03-10 21:25:52,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:52,770 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:52,770 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:52,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3302,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:52,971 INFO L428 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:52,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:52,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1414506023, now seen corresponding path program 294 times [2021-03-10 21:25:52,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:52,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696578942] [2021-03-10 21:25:52,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:53,072 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:53,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696578942] [2021-03-10 21:25:53,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397063526] [2021-03-10 21:25:53,072 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:53,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:25:53,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:53,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:53,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:53,155 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 12 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:53,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:53,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 17 [2021-03-10 21:25:53,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449023603] [2021-03-10 21:25:53,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:25:53,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:53,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:25:53,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:25:53,155 INFO L87 Difference]: Start difference. First operand 12456 states and 37021 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:53,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:53,489 INFO L93 Difference]: Finished difference Result 15061 states and 44163 transitions. [2021-03-10 21:25:53,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:25:53,490 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:53,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:53,507 INFO L225 Difference]: With dead ends: 15061 [2021-03-10 21:25:53,508 INFO L226 Difference]: Without dead ends: 15061 [2021-03-10 21:25:53,508 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 299.8ms TimeCoverageRelationStatistics Valid=471, Invalid=1089, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:25:53,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15061 states. [2021-03-10 21:25:53,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15061 to 13737. [2021-03-10 21:25:53,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13737 states, 13736 states have (on average 2.9764123471170647) internal successors, (40884), 13736 states have internal predecessors, (40884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:53,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13737 states to 13737 states and 40884 transitions. [2021-03-10 21:25:53,694 INFO L78 Accepts]: Start accepts. Automaton has 13737 states and 40884 transitions. Word has length 22 [2021-03-10 21:25:53,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:53,694 INFO L480 AbstractCegarLoop]: Abstraction has 13737 states and 40884 transitions. [2021-03-10 21:25:53,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:53,694 INFO L276 IsEmpty]: Start isEmpty. Operand 13737 states and 40884 transitions. [2021-03-10 21:25:53,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:53,705 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:53,705 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:53,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3303,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:53,906 INFO L428 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:53,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:53,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1952361601, now seen corresponding path program 295 times [2021-03-10 21:25:53,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:53,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969763548] [2021-03-10 21:25:53,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:53,999 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:53,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969763548] [2021-03-10 21:25:53,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034964547] [2021-03-10 21:25:53,999 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:54,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:54,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:54,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:54,168 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:54,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:54,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 18 [2021-03-10 21:25:54,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947571556] [2021-03-10 21:25:54,168 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:25:54,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:54,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:25:54,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:25:54,169 INFO L87 Difference]: Start difference. First operand 13737 states and 40884 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:54,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:54,544 INFO L93 Difference]: Finished difference Result 14989 states and 43964 transitions. [2021-03-10 21:25:54,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:25:54,544 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:54,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:54,561 INFO L225 Difference]: With dead ends: 14989 [2021-03-10 21:25:54,561 INFO L226 Difference]: Without dead ends: 14989 [2021-03-10 21:25:54,562 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 347.0ms TimeCoverageRelationStatistics Valid=523, Invalid=1199, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:25:54,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14989 states. [2021-03-10 21:25:54,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14989 to 13759. [2021-03-10 21:25:54,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13759 states, 13758 states have (on average 2.9763773804332025) internal successors, (40949), 13758 states have internal predecessors, (40949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:54,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13759 states to 13759 states and 40949 transitions. [2021-03-10 21:25:54,743 INFO L78 Accepts]: Start accepts. Automaton has 13759 states and 40949 transitions. Word has length 22 [2021-03-10 21:25:54,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:54,743 INFO L480 AbstractCegarLoop]: Abstraction has 13759 states and 40949 transitions. [2021-03-10 21:25:54,743 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:54,743 INFO L276 IsEmpty]: Start isEmpty. Operand 13759 states and 40949 transitions. [2021-03-10 21:25:54,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:54,753 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:54,753 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:54,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3304 [2021-03-10 21:25:54,953 INFO L428 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:54,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:54,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1446015335, now seen corresponding path program 296 times [2021-03-10 21:25:54,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:54,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939075177] [2021-03-10 21:25:54,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:54,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:55,048 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:55,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939075177] [2021-03-10 21:25:55,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311217040] [2021-03-10 21:25:55,048 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:55,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:25:55,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:55,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:55,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:55,138 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:55,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:55,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 18 [2021-03-10 21:25:55,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869124577] [2021-03-10 21:25:55,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:25:55,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:55,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:25:55,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:25:55,139 INFO L87 Difference]: Start difference. First operand 13759 states and 40949 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:55,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:55,503 INFO L93 Difference]: Finished difference Result 17231 states and 50882 transitions. [2021-03-10 21:25:55,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:25:55,504 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:55,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:55,525 INFO L225 Difference]: With dead ends: 17231 [2021-03-10 21:25:55,525 INFO L226 Difference]: Without dead ends: 17231 [2021-03-10 21:25:55,526 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 321.5ms TimeCoverageRelationStatistics Valid=518, Invalid=1204, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:25:55,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17231 states. [2021-03-10 21:25:55,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17231 to 16400. [2021-03-10 21:25:55,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16400 states, 16399 states have (on average 2.9804256357094947) internal successors, (48876), 16399 states have internal predecessors, (48876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:55,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16400 states to 16400 states and 48876 transitions. [2021-03-10 21:25:55,748 INFO L78 Accepts]: Start accepts. Automaton has 16400 states and 48876 transitions. Word has length 22 [2021-03-10 21:25:55,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:55,749 INFO L480 AbstractCegarLoop]: Abstraction has 16400 states and 48876 transitions. [2021-03-10 21:25:55,749 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:55,749 INFO L276 IsEmpty]: Start isEmpty. Operand 16400 states and 48876 transitions. [2021-03-10 21:25:55,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:55,760 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:55,760 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:55,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3305,298 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:55,961 INFO L428 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:55,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:55,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1365817023, now seen corresponding path program 297 times [2021-03-10 21:25:55,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:55,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993002462] [2021-03-10 21:25:55,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:56,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993002462] [2021-03-10 21:25:56,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836215818] [2021-03-10 21:25:56,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:56,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:25:56,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:56,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:56,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:56,165 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:56,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:56,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 19 [2021-03-10 21:25:56,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057124991] [2021-03-10 21:25:56,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:25:56,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:56,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:25:56,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:25:56,166 INFO L87 Difference]: Start difference. First operand 16400 states and 48876 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:56,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:56,498 INFO L93 Difference]: Finished difference Result 17044 states and 50389 transitions. [2021-03-10 21:25:56,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:25:56,499 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:56,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:56,520 INFO L225 Difference]: With dead ends: 17044 [2021-03-10 21:25:56,520 INFO L226 Difference]: Without dead ends: 17044 [2021-03-10 21:25:56,520 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 312.7ms TimeCoverageRelationStatistics Valid=459, Invalid=1101, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:25:56,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17044 states. [2021-03-10 21:25:56,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17044 to 16341. [2021-03-10 21:25:56,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16341 states, 16340 states have (on average 2.980232558139535) internal successors, (48697), 16340 states have internal predecessors, (48697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:56,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16341 states to 16341 states and 48697 transitions. [2021-03-10 21:25:56,733 INFO L78 Accepts]: Start accepts. Automaton has 16341 states and 48697 transitions. Word has length 22 [2021-03-10 21:25:56,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:56,733 INFO L480 AbstractCegarLoop]: Abstraction has 16341 states and 48697 transitions. [2021-03-10 21:25:56,734 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:56,734 INFO L276 IsEmpty]: Start isEmpty. Operand 16341 states and 48697 transitions. [2021-03-10 21:25:56,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:56,866 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:56,866 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:57,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3306,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:57,066 INFO L428 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:57,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:57,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1661693095, now seen corresponding path program 298 times [2021-03-10 21:25:57,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:57,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784911802] [2021-03-10 21:25:57,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:57,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:57,165 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:57,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784911802] [2021-03-10 21:25:57,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162900841] [2021-03-10 21:25:57,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:57,184 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:25:57,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:57,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:57,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:57,264 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 14 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:25:57,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:57,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 19 [2021-03-10 21:25:57,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560250713] [2021-03-10 21:25:57,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:25:57,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:57,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:25:57,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:25:57,265 INFO L87 Difference]: Start difference. First operand 16341 states and 48697 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:57,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:57,575 INFO L93 Difference]: Finished difference Result 18181 states and 53895 transitions. [2021-03-10 21:25:57,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:25:57,575 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:57,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:57,597 INFO L225 Difference]: With dead ends: 18181 [2021-03-10 21:25:57,597 INFO L226 Difference]: Without dead ends: 18181 [2021-03-10 21:25:57,598 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 302.6ms TimeCoverageRelationStatistics Valid=427, Invalid=1055, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:25:57,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18181 states. [2021-03-10 21:25:57,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18181 to 17672. [2021-03-10 21:25:57,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17672 states, 17671 states have (on average 2.982287363476883) internal successors, (52700), 17671 states have internal predecessors, (52700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:57,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17672 states to 17672 states and 52700 transitions. [2021-03-10 21:25:57,832 INFO L78 Accepts]: Start accepts. Automaton has 17672 states and 52700 transitions. Word has length 22 [2021-03-10 21:25:57,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:57,832 INFO L480 AbstractCegarLoop]: Abstraction has 17672 states and 52700 transitions. [2021-03-10 21:25:57,832 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 19 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:57,832 INFO L276 IsEmpty]: Start isEmpty. Operand 17672 states and 52700 transitions. [2021-03-10 21:25:57,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:57,846 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:57,846 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:58,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3307 [2021-03-10 21:25:58,046 INFO L428 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:58,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:58,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1025226241, now seen corresponding path program 299 times [2021-03-10 21:25:58,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:58,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399785308] [2021-03-10 21:25:58,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:58,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:58,149 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 8 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:58,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399785308] [2021-03-10 21:25:58,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510446838] [2021-03-10 21:25:58,149 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:58,169 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:25:58,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:58,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:58,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:58,257 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:58,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:58,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 20 [2021-03-10 21:25:58,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531031669] [2021-03-10 21:25:58,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:25:58,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:58,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:25:58,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:25:58,258 INFO L87 Difference]: Start difference. First operand 17672 states and 52700 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:58,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:58,604 INFO L93 Difference]: Finished difference Result 18327 states and 54324 transitions. [2021-03-10 21:25:58,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:25:58,605 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:58,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:58,627 INFO L225 Difference]: With dead ends: 18327 [2021-03-10 21:25:58,627 INFO L226 Difference]: Without dead ends: 18327 [2021-03-10 21:25:58,627 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 326.9ms TimeCoverageRelationStatistics Valid=469, Invalid=1171, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:25:58,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18327 states. [2021-03-10 21:25:58,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18327 to 17682. [2021-03-10 21:25:58,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17682 states, 17681 states have (on average 2.982240823482835) internal successors, (52729), 17681 states have internal predecessors, (52729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:58,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17682 states to 17682 states and 52729 transitions. [2021-03-10 21:25:58,871 INFO L78 Accepts]: Start accepts. Automaton has 17682 states and 52729 transitions. Word has length 22 [2021-03-10 21:25:58,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:25:58,871 INFO L480 AbstractCegarLoop]: Abstraction has 17682 states and 52729 transitions. [2021-03-10 21:25:58,871 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:58,871 INFO L276 IsEmpty]: Start isEmpty. Operand 17682 states and 52729 transitions. [2021-03-10 21:25:58,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 21:25:58,884 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:25:58,884 INFO L519 BasicCegarLoop]: trace histogram [8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:25:59,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3308,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:59,085 INFO L428 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:25:59,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:25:59,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1525377049, now seen corresponding path program 300 times [2021-03-10 21:25:59,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:25:59,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494757677] [2021-03-10 21:25:59,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:25:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:25:59,225 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 11 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:59,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494757677] [2021-03-10 21:25:59,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422209870] [2021-03-10 21:25:59,225 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:25:59,246 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:25:59,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:25:59,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:25:59,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:25:59,341 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:25:59,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:25:59,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-03-10 21:25:59,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699965436] [2021-03-10 21:25:59,342 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:25:59,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:25:59,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:25:59,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=345, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:25:59,342 INFO L87 Difference]: Start difference. First operand 17682 states and 52729 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:25:59,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:25:59,848 INFO L93 Difference]: Finished difference Result 19601 states and 58121 transitions. [2021-03-10 21:25:59,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 21:25:59,849 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 21:25:59,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:25:59,872 INFO L225 Difference]: With dead ends: 19601 [2021-03-10 21:25:59,872 INFO L226 Difference]: Without dead ends: 19601 [2021-03-10 21:25:59,873 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 484.5ms TimeCoverageRelationStatistics Valid=858, Invalid=2004, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 21:25:59,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19601 states. [2021-03-10 21:26:00,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19601 to 17866. [2021-03-10 21:26:00,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17866 states, 17865 states have (on average 2.9824797089280715) internal successors, (53282), 17865 states have internal predecessors, (53282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:00,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17866 states to 17866 states and 53282 transitions. [2021-03-10 21:26:00,159 INFO L78 Accepts]: Start accepts. Automaton has 17866 states and 53282 transitions. Word has length 22 [2021-03-10 21:26:00,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:00,159 INFO L480 AbstractCegarLoop]: Abstraction has 17866 states and 53282 transitions. [2021-03-10 21:26:00,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:00,159 INFO L276 IsEmpty]: Start isEmpty. Operand 17866 states and 53282 transitions. [2021-03-10 21:26:00,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:00,174 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:00,174 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:00,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3309 [2021-03-10 21:26:00,374 INFO L428 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:00,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:00,375 INFO L82 PathProgramCache]: Analyzing trace with hash -120035998, now seen corresponding path program 301 times [2021-03-10 21:26:00,375 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:00,375 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576560474] [2021-03-10 21:26:00,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:00,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:00,434 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:00,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576560474] [2021-03-10 21:26:00,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865320867] [2021-03-10 21:26:00,435 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:00,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:00,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:00,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:00,515 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:00,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:00,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-03-10 21:26:00,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615563249] [2021-03-10 21:26:00,516 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:00,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:00,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:00,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:00,517 INFO L87 Difference]: Start difference. First operand 17866 states and 53282 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:00,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:00,733 INFO L93 Difference]: Finished difference Result 18113 states and 53632 transitions. [2021-03-10 21:26:00,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:26:00,734 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:00,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:00,756 INFO L225 Difference]: With dead ends: 18113 [2021-03-10 21:26:00,757 INFO L226 Difference]: Without dead ends: 18109 [2021-03-10 21:26:00,757 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 128.2ms TimeCoverageRelationStatistics Valid=225, Invalid=425, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:26:00,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18109 states. [2021-03-10 21:26:00,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18109 to 17844. [2021-03-10 21:26:00,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17844 states, 17843 states have (on average 2.981393263464664) internal successors, (53197), 17843 states have internal predecessors, (53197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:01,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17844 states to 17844 states and 53197 transitions. [2021-03-10 21:26:01,007 INFO L78 Accepts]: Start accepts. Automaton has 17844 states and 53197 transitions. Word has length 23 [2021-03-10 21:26:01,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:01,007 INFO L480 AbstractCegarLoop]: Abstraction has 17844 states and 53197 transitions. [2021-03-10 21:26:01,007 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:01,007 INFO L276 IsEmpty]: Start isEmpty. Operand 17844 states and 53197 transitions. [2021-03-10 21:26:01,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:01,021 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:01,021 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:01,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3310,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:01,221 INFO L428 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:01,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:01,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1369368998, now seen corresponding path program 302 times [2021-03-10 21:26:01,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:01,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964497097] [2021-03-10 21:26:01,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:01,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:01,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964497097] [2021-03-10 21:26:01,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931678820] [2021-03-10 21:26:01,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:01,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:01,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:01,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:01,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:01,351 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:26:01,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:01,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-03-10 21:26:01,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358478161] [2021-03-10 21:26:01,352 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:26:01,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:01,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:26:01,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:26:01,352 INFO L87 Difference]: Start difference. First operand 17844 states and 53197 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:01,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:01,600 INFO L93 Difference]: Finished difference Result 18088 states and 53547 transitions. [2021-03-10 21:26:01,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:26:01,601 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:01,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:01,624 INFO L225 Difference]: With dead ends: 18088 [2021-03-10 21:26:01,624 INFO L226 Difference]: Without dead ends: 18082 [2021-03-10 21:26:01,624 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 145.4ms TimeCoverageRelationStatistics Valid=257, Invalid=499, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:26:01,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18082 states. [2021-03-10 21:26:01,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18082 to 17833. [2021-03-10 21:26:01,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17833 states, 17832 states have (on average 2.980820995962315) internal successors, (53154), 17832 states have internal predecessors, (53154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:01,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17833 states to 17833 states and 53154 transitions. [2021-03-10 21:26:01,870 INFO L78 Accepts]: Start accepts. Automaton has 17833 states and 53154 transitions. Word has length 23 [2021-03-10 21:26:01,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:01,870 INFO L480 AbstractCegarLoop]: Abstraction has 17833 states and 53154 transitions. [2021-03-10 21:26:01,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:01,870 INFO L276 IsEmpty]: Start isEmpty. Operand 17833 states and 53154 transitions. [2021-03-10 21:26:01,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:01,883 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:01,884 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:02,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3311,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:02,084 INFO L428 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:02,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:02,084 INFO L82 PathProgramCache]: Analyzing trace with hash 296283618, now seen corresponding path program 303 times [2021-03-10 21:26:02,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:02,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209040344] [2021-03-10 21:26:02,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:02,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:02,157 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:02,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209040344] [2021-03-10 21:26:02,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486581609] [2021-03-10 21:26:02,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:02,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 21:26:02,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:02,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:26:02,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:02,229 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:02,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:02,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:26:02,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973825694] [2021-03-10 21:26:02,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:26:02,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:02,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:26:02,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:02,229 INFO L87 Difference]: Start difference. First operand 17833 states and 53154 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:02,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:02,533 INFO L93 Difference]: Finished difference Result 18081 states and 53510 transitions. [2021-03-10 21:26:02,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:26:02,534 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:02,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:02,553 INFO L225 Difference]: With dead ends: 18081 [2021-03-10 21:26:02,554 INFO L226 Difference]: Without dead ends: 18075 [2021-03-10 21:26:02,554 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 166.4ms TimeCoverageRelationStatistics Valid=292, Invalid=578, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:26:02,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18075 states. [2021-03-10 21:26:02,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18075 to 17833. [2021-03-10 21:26:02,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17833 states, 17832 states have (on average 2.9803723642889186) internal successors, (53146), 17832 states have internal predecessors, (53146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:02,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17833 states to 17833 states and 53146 transitions. [2021-03-10 21:26:02,791 INFO L78 Accepts]: Start accepts. Automaton has 17833 states and 53146 transitions. Word has length 23 [2021-03-10 21:26:02,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:02,791 INFO L480 AbstractCegarLoop]: Abstraction has 17833 states and 53146 transitions. [2021-03-10 21:26:02,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:02,791 INFO L276 IsEmpty]: Start isEmpty. Operand 17833 states and 53146 transitions. [2021-03-10 21:26:02,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:02,804 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:02,804 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:03,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3312 [2021-03-10 21:26:03,005 INFO L428 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:03,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:03,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1390375206, now seen corresponding path program 304 times [2021-03-10 21:26:03,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:03,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767836435] [2021-03-10 21:26:03,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:03,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:03,080 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:03,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767836435] [2021-03-10 21:26:03,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826160634] [2021-03-10 21:26:03,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:03,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:03,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:03,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:03,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:03,146 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:03,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:03,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-03-10 21:26:03,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938641076] [2021-03-10 21:26:03,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:26:03,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:03,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:26:03,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:03,147 INFO L87 Difference]: Start difference. First operand 17833 states and 53146 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:03,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:03,381 INFO L93 Difference]: Finished difference Result 18366 states and 54302 transitions. [2021-03-10 21:26:03,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:26:03,382 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:03,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:03,404 INFO L225 Difference]: With dead ends: 18366 [2021-03-10 21:26:03,404 INFO L226 Difference]: Without dead ends: 18358 [2021-03-10 21:26:03,404 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 161.1ms TimeCoverageRelationStatistics Valid=241, Invalid=515, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:26:03,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18358 states. [2021-03-10 21:26:03,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18358 to 17840. [2021-03-10 21:26:03,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17840 states, 17839 states have (on average 2.98009978137788) internal successors, (53162), 17839 states have internal predecessors, (53162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:03,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17840 states to 17840 states and 53162 transitions. [2021-03-10 21:26:03,647 INFO L78 Accepts]: Start accepts. Automaton has 17840 states and 53162 transitions. Word has length 23 [2021-03-10 21:26:03,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:03,647 INFO L480 AbstractCegarLoop]: Abstraction has 17840 states and 53162 transitions. [2021-03-10 21:26:03,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:03,647 INFO L276 IsEmpty]: Start isEmpty. Operand 17840 states and 53162 transitions. [2021-03-10 21:26:03,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:03,661 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:03,661 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:03,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3313,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:03,862 INFO L428 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:03,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:03,862 INFO L82 PathProgramCache]: Analyzing trace with hash 900986926, now seen corresponding path program 305 times [2021-03-10 21:26:03,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:03,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822450994] [2021-03-10 21:26:03,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:03,942 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:03,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822450994] [2021-03-10 21:26:03,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998716174] [2021-03-10 21:26:03,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:03,963 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:26:03,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:03,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:03,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:04,004 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:04,004 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:04,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-03-10 21:26:04,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127849457] [2021-03-10 21:26:04,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:26:04,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:04,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:26:04,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:04,005 INFO L87 Difference]: Start difference. First operand 17840 states and 53162 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:04,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:04,241 INFO L93 Difference]: Finished difference Result 18066 states and 53531 transitions. [2021-03-10 21:26:04,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:26:04,242 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:04,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:04,263 INFO L225 Difference]: With dead ends: 18066 [2021-03-10 21:26:04,263 INFO L226 Difference]: Without dead ends: 18058 [2021-03-10 21:26:04,263 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 164.3ms TimeCoverageRelationStatistics Valid=268, Invalid=544, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:26:04,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18058 states. [2021-03-10 21:26:04,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18058 to 17835. [2021-03-10 21:26:04,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17835 states, 17834 states have (on average 2.9798138387350006) internal successors, (53142), 17834 states have internal predecessors, (53142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:04,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17835 states to 17835 states and 53142 transitions. [2021-03-10 21:26:04,509 INFO L78 Accepts]: Start accepts. Automaton has 17835 states and 53142 transitions. Word has length 23 [2021-03-10 21:26:04,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:04,509 INFO L480 AbstractCegarLoop]: Abstraction has 17835 states and 53142 transitions. [2021-03-10 21:26:04,509 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:04,509 INFO L276 IsEmpty]: Start isEmpty. Operand 17835 states and 53142 transitions. [2021-03-10 21:26:04,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:04,523 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:04,523 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:04,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3314 [2021-03-10 21:26:04,723 INFO L428 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:04,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:04,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1037982158, now seen corresponding path program 306 times [2021-03-10 21:26:04,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:04,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598017194] [2021-03-10 21:26:04,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:04,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:04,778 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:04,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598017194] [2021-03-10 21:26:04,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834966853] [2021-03-10 21:26:04,778 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:04,800 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:26:04,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:04,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:26:04,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:04,848 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:26:04,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:04,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:26:04,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898411986] [2021-03-10 21:26:04,849 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:26:04,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:04,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:26:04,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:26:04,849 INFO L87 Difference]: Start difference. First operand 17835 states and 53142 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:05,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:05,030 INFO L93 Difference]: Finished difference Result 18191 states and 53712 transitions. [2021-03-10 21:26:05,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:26:05,031 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:05,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:05,051 INFO L225 Difference]: With dead ends: 18191 [2021-03-10 21:26:05,051 INFO L226 Difference]: Without dead ends: 18189 [2021-03-10 21:26:05,051 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 66.0ms TimeCoverageRelationStatistics Valid=100, Invalid=140, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:05,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18189 states. [2021-03-10 21:26:05,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18189 to 17847. [2021-03-10 21:26:05,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17847 states, 17846 states have (on average 2.979379132578729) internal successors, (53170), 17846 states have internal predecessors, (53170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:05,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17847 states to 17847 states and 53170 transitions. [2021-03-10 21:26:05,288 INFO L78 Accepts]: Start accepts. Automaton has 17847 states and 53170 transitions. Word has length 23 [2021-03-10 21:26:05,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:05,288 INFO L480 AbstractCegarLoop]: Abstraction has 17847 states and 53170 transitions. [2021-03-10 21:26:05,288 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:05,288 INFO L276 IsEmpty]: Start isEmpty. Operand 17847 states and 53170 transitions. [2021-03-10 21:26:05,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:05,303 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:05,303 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:05,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3315,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:05,503 INFO L428 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:05,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:05,503 INFO L82 PathProgramCache]: Analyzing trace with hash 707472532, now seen corresponding path program 307 times [2021-03-10 21:26:05,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:05,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781144769] [2021-03-10 21:26:05,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:05,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:05,562 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:05,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781144769] [2021-03-10 21:26:05,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979951069] [2021-03-10 21:26:05,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:05,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:05,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:05,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:05,630 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:26:05,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:05,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-03-10 21:26:05,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428318396] [2021-03-10 21:26:05,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:05,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:05,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:05,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:05,631 INFO L87 Difference]: Start difference. First operand 17847 states and 53170 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:05,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:05,794 INFO L93 Difference]: Finished difference Result 18272 states and 53872 transitions. [2021-03-10 21:26:05,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:26:05,794 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:05,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:05,820 INFO L225 Difference]: With dead ends: 18272 [2021-03-10 21:26:05,820 INFO L226 Difference]: Without dead ends: 18271 [2021-03-10 21:26:05,820 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 86.7ms TimeCoverageRelationStatistics Valid=134, Invalid=246, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:26:05,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18271 states. [2021-03-10 21:26:06,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18271 to 17840. [2021-03-10 21:26:06,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17840 states, 17839 states have (on average 2.9784180727619263) internal successors, (53132), 17839 states have internal predecessors, (53132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:06,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17840 states to 17840 states and 53132 transitions. [2021-03-10 21:26:06,077 INFO L78 Accepts]: Start accepts. Automaton has 17840 states and 53132 transitions. Word has length 23 [2021-03-10 21:26:06,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:06,077 INFO L480 AbstractCegarLoop]: Abstraction has 17840 states and 53132 transitions. [2021-03-10 21:26:06,077 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:06,077 INFO L276 IsEmpty]: Start isEmpty. Operand 17840 states and 53132 transitions. [2021-03-10 21:26:06,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:06,091 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:06,091 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:06,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3316 [2021-03-10 21:26:06,292 INFO L428 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:06,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:06,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1876881456, now seen corresponding path program 308 times [2021-03-10 21:26:06,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:06,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905655590] [2021-03-10 21:26:06,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:06,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:06,354 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:06,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905655590] [2021-03-10 21:26:06,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687181458] [2021-03-10 21:26:06,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:06,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:06,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:06,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:06,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:06,415 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:26:06,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:06,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-03-10 21:26:06,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831023326] [2021-03-10 21:26:06,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:06,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:06,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:06,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:06,416 INFO L87 Difference]: Start difference. First operand 17840 states and 53132 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:06,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:06,626 INFO L93 Difference]: Finished difference Result 18131 states and 53544 transitions. [2021-03-10 21:26:06,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:26:06,627 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:06,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:06,648 INFO L225 Difference]: With dead ends: 18131 [2021-03-10 21:26:06,648 INFO L226 Difference]: Without dead ends: 18126 [2021-03-10 21:26:06,648 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 124.0ms TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:26:06,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18126 states. [2021-03-10 21:26:06,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18126 to 17829. [2021-03-10 21:26:06,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17829 states, 17828 states have (on average 2.976946376486426) internal successors, (53073), 17828 states have internal predecessors, (53073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:06,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17829 states to 17829 states and 53073 transitions. [2021-03-10 21:26:06,893 INFO L78 Accepts]: Start accepts. Automaton has 17829 states and 53073 transitions. Word has length 23 [2021-03-10 21:26:06,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:06,893 INFO L480 AbstractCegarLoop]: Abstraction has 17829 states and 53073 transitions. [2021-03-10 21:26:06,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:06,893 INFO L276 IsEmpty]: Start isEmpty. Operand 17829 states and 53073 transitions. [2021-03-10 21:26:06,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:06,907 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:06,907 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:07,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3317,310 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:07,107 INFO L428 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:07,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:07,107 INFO L82 PathProgramCache]: Analyzing trace with hash -387476460, now seen corresponding path program 309 times [2021-03-10 21:26:07,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:07,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258416851] [2021-03-10 21:26:07,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:07,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:07,175 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:07,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258416851] [2021-03-10 21:26:07,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975063984] [2021-03-10 21:26:07,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:07,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:26:07,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:07,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:26:07,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:07,239 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:07,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:07,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:26:07,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625859882] [2021-03-10 21:26:07,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:26:07,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:07,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:26:07,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:26:07,240 INFO L87 Difference]: Start difference. First operand 17829 states and 53073 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:07,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:07,537 INFO L93 Difference]: Finished difference Result 18120 states and 53485 transitions. [2021-03-10 21:26:07,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:26:07,538 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:07,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:07,560 INFO L225 Difference]: With dead ends: 18120 [2021-03-10 21:26:07,560 INFO L226 Difference]: Without dead ends: 18110 [2021-03-10 21:26:07,560 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 188.1ms TimeCoverageRelationStatistics Valid=240, Invalid=462, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:26:07,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18110 states. [2021-03-10 21:26:07,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18110 to 17810. [2021-03-10 21:26:07,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17810 states, 17809 states have (on average 2.9759110562075355) internal successors, (52998), 17809 states have internal predecessors, (52998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:07,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17810 states to 17810 states and 52998 transitions. [2021-03-10 21:26:07,867 INFO L78 Accepts]: Start accepts. Automaton has 17810 states and 52998 transitions. Word has length 23 [2021-03-10 21:26:07,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:07,867 INFO L480 AbstractCegarLoop]: Abstraction has 17810 states and 52998 transitions. [2021-03-10 21:26:07,867 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:07,868 INFO L276 IsEmpty]: Start isEmpty. Operand 17810 states and 52998 transitions. [2021-03-10 21:26:07,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:07,881 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:07,881 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:08,081 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3318,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:08,081 INFO L428 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:08,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:08,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1460561840, now seen corresponding path program 310 times [2021-03-10 21:26:08,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:08,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715511590] [2021-03-10 21:26:08,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:08,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:08,162 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 20 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:08,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715511590] [2021-03-10 21:26:08,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701877504] [2021-03-10 21:26:08,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:08,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:08,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:08,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:08,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:08,229 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:26:08,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:08,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-03-10 21:26:08,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880342375] [2021-03-10 21:26:08,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:26:08,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:08,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:26:08,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:26:08,230 INFO L87 Difference]: Start difference. First operand 17810 states and 52998 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:08,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:08,439 INFO L93 Difference]: Finished difference Result 18994 states and 55842 transitions. [2021-03-10 21:26:08,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:26:08,440 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:08,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:08,463 INFO L225 Difference]: With dead ends: 18994 [2021-03-10 21:26:08,463 INFO L226 Difference]: Without dead ends: 18988 [2021-03-10 21:26:08,463 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 144.7ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:26:08,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18988 states. [2021-03-10 21:26:08,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18988 to 17829. [2021-03-10 21:26:08,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17829 states, 17828 states have (on average 2.9754319048687456) internal successors, (53046), 17828 states have internal predecessors, (53046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:08,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17829 states to 17829 states and 53046 transitions. [2021-03-10 21:26:08,706 INFO L78 Accepts]: Start accepts. Automaton has 17829 states and 53046 transitions. Word has length 23 [2021-03-10 21:26:08,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:08,706 INFO L480 AbstractCegarLoop]: Abstraction has 17829 states and 53046 transitions. [2021-03-10 21:26:08,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:08,706 INFO L276 IsEmpty]: Start isEmpty. Operand 17829 states and 53046 transitions. [2021-03-10 21:26:08,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:08,720 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:08,720 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:08,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3319 [2021-03-10 21:26:08,921 INFO L428 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:08,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:08,921 INFO L82 PathProgramCache]: Analyzing trace with hash -366470252, now seen corresponding path program 311 times [2021-03-10 21:26:08,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:08,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30957871] [2021-03-10 21:26:08,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:08,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:09,022 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:09,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30957871] [2021-03-10 21:26:09,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913458055] [2021-03-10 21:26:09,023 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:09,044 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:26:09,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:09,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:26:09,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:09,086 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:09,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:09,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:26:09,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124612549] [2021-03-10 21:26:09,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:26:09,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:09,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:26:09,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:09,087 INFO L87 Difference]: Start difference. First operand 17829 states and 53046 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:09,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:09,302 INFO L93 Difference]: Finished difference Result 19008 states and 55851 transitions. [2021-03-10 21:26:09,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:26:09,303 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:09,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:09,328 INFO L225 Difference]: With dead ends: 19008 [2021-03-10 21:26:09,328 INFO L226 Difference]: Without dead ends: 19000 [2021-03-10 21:26:09,328 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 159.9ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:26:09,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19000 states. [2021-03-10 21:26:09,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19000 to 17854. [2021-03-10 21:26:09,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17854 states, 17853 states have (on average 2.975354282193469) internal successors, (53119), 17853 states have internal predecessors, (53119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:09,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17854 states to 17854 states and 53119 transitions. [2021-03-10 21:26:09,573 INFO L78 Accepts]: Start accepts. Automaton has 17854 states and 53119 transitions. Word has length 23 [2021-03-10 21:26:09,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:09,573 INFO L480 AbstractCegarLoop]: Abstraction has 17854 states and 53119 transitions. [2021-03-10 21:26:09,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:09,573 INFO L276 IsEmpty]: Start isEmpty. Operand 17854 states and 53119 transitions. [2021-03-10 21:26:09,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:09,587 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:09,587 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:09,788 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3320 [2021-03-10 21:26:09,788 INFO L428 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:09,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:09,788 INFO L82 PathProgramCache]: Analyzing trace with hash -809369392, now seen corresponding path program 312 times [2021-03-10 21:26:09,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:09,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150968885] [2021-03-10 21:26:09,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:09,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:09,874 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:09,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150968885] [2021-03-10 21:26:09,874 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66947859] [2021-03-10 21:26:09,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:09,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:26:09,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:09,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:26:09,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:09,939 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:09,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:09,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:26:09,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289817222] [2021-03-10 21:26:09,939 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:26:09,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:09,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:26:09,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:09,939 INFO L87 Difference]: Start difference. First operand 17854 states and 53119 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:10,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:10,184 INFO L93 Difference]: Finished difference Result 18500 states and 54560 transitions. [2021-03-10 21:26:10,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:26:10,185 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:10,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:10,208 INFO L225 Difference]: With dead ends: 18500 [2021-03-10 21:26:10,208 INFO L226 Difference]: Without dead ends: 18490 [2021-03-10 21:26:10,208 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 178.4ms TimeCoverageRelationStatistics Valid=257, Invalid=555, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:26:10,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18490 states. [2021-03-10 21:26:10,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18490 to 17854. [2021-03-10 21:26:10,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17854 states, 17853 states have (on average 2.9751302302134097) internal successors, (53115), 17853 states have internal predecessors, (53115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:10,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17854 states to 17854 states and 53115 transitions. [2021-03-10 21:26:10,522 INFO L78 Accepts]: Start accepts. Automaton has 17854 states and 53115 transitions. Word has length 23 [2021-03-10 21:26:10,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:10,522 INFO L480 AbstractCegarLoop]: Abstraction has 17854 states and 53115 transitions. [2021-03-10 21:26:10,522 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:10,522 INFO L276 IsEmpty]: Start isEmpty. Operand 17854 states and 53115 transitions. [2021-03-10 21:26:10,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:10,537 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:10,537 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:10,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3321,314 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:10,737 INFO L428 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:10,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:10,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1196093342, now seen corresponding path program 313 times [2021-03-10 21:26:10,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:10,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950541477] [2021-03-10 21:26:10,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:10,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:10,807 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:10,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950541477] [2021-03-10 21:26:10,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036909414] [2021-03-10 21:26:10,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:10,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:10,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:10,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:10,867 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:26:10,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:10,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-03-10 21:26:10,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876663834] [2021-03-10 21:26:10,867 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:26:10,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:10,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:26:10,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:26:10,867 INFO L87 Difference]: Start difference. First operand 17854 states and 53115 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:11,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:11,096 INFO L93 Difference]: Finished difference Result 18151 states and 53567 transitions. [2021-03-10 21:26:11,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:26:11,096 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:11,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:11,119 INFO L225 Difference]: With dead ends: 18151 [2021-03-10 21:26:11,119 INFO L226 Difference]: Without dead ends: 18139 [2021-03-10 21:26:11,119 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 135.1ms TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:26:11,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18139 states. [2021-03-10 21:26:11,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18139 to 17811. [2021-03-10 21:26:11,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17811 states, 17810 states have (on average 2.9742841100505335) internal successors, (52972), 17810 states have internal predecessors, (52972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:11,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17811 states to 17811 states and 52972 transitions. [2021-03-10 21:26:11,367 INFO L78 Accepts]: Start accepts. Automaton has 17811 states and 52972 transitions. Word has length 23 [2021-03-10 21:26:11,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:11,367 INFO L480 AbstractCegarLoop]: Abstraction has 17811 states and 52972 transitions. [2021-03-10 21:26:11,367 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:11,367 INFO L276 IsEmpty]: Start isEmpty. Operand 17811 states and 52972 transitions. [2021-03-10 21:26:11,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:11,380 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:11,380 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:11,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3322,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:11,581 INFO L428 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:11,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:11,581 INFO L82 PathProgramCache]: Analyzing trace with hash -102001754, now seen corresponding path program 314 times [2021-03-10 21:26:11,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:11,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543647644] [2021-03-10 21:26:11,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:11,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:11,658 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:11,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543647644] [2021-03-10 21:26:11,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526166469] [2021-03-10 21:26:11,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:11,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:11,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:11,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:11,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:11,721 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:11,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:11,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-03-10 21:26:11,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844996297] [2021-03-10 21:26:11,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:26:11,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:11,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:26:11,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:11,721 INFO L87 Difference]: Start difference. First operand 17811 states and 52972 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:11,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:11,969 INFO L93 Difference]: Finished difference Result 18119 states and 53440 transitions. [2021-03-10 21:26:11,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:26:11,970 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:11,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:11,992 INFO L225 Difference]: With dead ends: 18119 [2021-03-10 21:26:11,992 INFO L226 Difference]: Without dead ends: 18107 [2021-03-10 21:26:11,992 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 153.8ms TimeCoverageRelationStatistics Valid=248, Invalid=508, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:26:12,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18107 states. [2021-03-10 21:26:12,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18107 to 17779. [2021-03-10 21:26:12,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17779 states, 17778 states have (on average 2.9742940713241084) internal successors, (52877), 17778 states have internal predecessors, (52877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:12,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17779 states to 17779 states and 52877 transitions. [2021-03-10 21:26:12,239 INFO L78 Accepts]: Start accepts. Automaton has 17779 states and 52877 transitions. Word has length 23 [2021-03-10 21:26:12,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:12,239 INFO L480 AbstractCegarLoop]: Abstraction has 17779 states and 52877 transitions. [2021-03-10 21:26:12,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:12,239 INFO L276 IsEmpty]: Start isEmpty. Operand 17779 states and 52877 transitions. [2021-03-10 21:26:12,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:12,253 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:12,253 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:12,454 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3323,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:12,454 INFO L428 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:12,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:12,454 INFO L82 PathProgramCache]: Analyzing trace with hash -544900894, now seen corresponding path program 315 times [2021-03-10 21:26:12,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:12,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700833122] [2021-03-10 21:26:12,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:12,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:12,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700833122] [2021-03-10 21:26:12,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949659712] [2021-03-10 21:26:12,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:12,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:26:12,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:12,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:26:12,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:12,600 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:12,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:12,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:26:12,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73250089] [2021-03-10 21:26:12,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:26:12,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:12,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:26:12,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:12,601 INFO L87 Difference]: Start difference. First operand 17779 states and 52877 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:12,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:12,867 INFO L93 Difference]: Finished difference Result 18547 states and 54582 transitions. [2021-03-10 21:26:12,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:26:12,868 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:12,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:12,894 INFO L225 Difference]: With dead ends: 18547 [2021-03-10 21:26:12,894 INFO L226 Difference]: Without dead ends: 18532 [2021-03-10 21:26:12,894 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 181.3ms TimeCoverageRelationStatistics Valid=282, Invalid=588, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:26:12,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18532 states. [2021-03-10 21:26:13,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18532 to 17766. [2021-03-10 21:26:13,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17766 states, 17765 states have (on average 2.974838164931044) internal successors, (52848), 17765 states have internal predecessors, (52848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:13,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17766 states to 17766 states and 52848 transitions. [2021-03-10 21:26:13,127 INFO L78 Accepts]: Start accepts. Automaton has 17766 states and 52848 transitions. Word has length 23 [2021-03-10 21:26:13,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:13,127 INFO L480 AbstractCegarLoop]: Abstraction has 17766 states and 52848 transitions. [2021-03-10 21:26:13,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:13,128 INFO L276 IsEmpty]: Start isEmpty. Operand 17766 states and 52848 transitions. [2021-03-10 21:26:13,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:13,141 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:13,141 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:13,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3324,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:13,342 INFO L428 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:13,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:13,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1199463112, now seen corresponding path program 316 times [2021-03-10 21:26:13,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:13,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034053546] [2021-03-10 21:26:13,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:13,426 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:13,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034053546] [2021-03-10 21:26:13,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404622313] [2021-03-10 21:26:13,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:13,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:13,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:13,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:13,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:13,494 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:13,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:13,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-03-10 21:26:13,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291584211] [2021-03-10 21:26:13,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:26:13,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:13,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:26:13,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:13,495 INFO L87 Difference]: Start difference. First operand 17766 states and 52848 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:13,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:13,795 INFO L93 Difference]: Finished difference Result 18019 states and 53257 transitions. [2021-03-10 21:26:13,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:26:13,796 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:13,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:13,818 INFO L225 Difference]: With dead ends: 18019 [2021-03-10 21:26:13,818 INFO L226 Difference]: Without dead ends: 18009 [2021-03-10 21:26:13,818 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 177.1ms TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:26:13,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18009 states. [2021-03-10 21:26:14,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18009 to 17756. [2021-03-10 21:26:14,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17756 states, 17755 states have (on average 2.9744297381019433) internal successors, (52811), 17755 states have internal predecessors, (52811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:14,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17756 states to 17756 states and 52811 transitions. [2021-03-10 21:26:14,045 INFO L78 Accepts]: Start accepts. Automaton has 17756 states and 52811 transitions. Word has length 23 [2021-03-10 21:26:14,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:14,046 INFO L480 AbstractCegarLoop]: Abstraction has 17756 states and 52811 transitions. [2021-03-10 21:26:14,046 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:14,046 INFO L276 IsEmpty]: Start isEmpty. Operand 17756 states and 52811 transitions. [2021-03-10 21:26:14,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:14,058 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:14,058 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:14,258 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3325,318 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:14,259 INFO L428 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:14,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:14,259 INFO L82 PathProgramCache]: Analyzing trace with hash 334383492, now seen corresponding path program 317 times [2021-03-10 21:26:14,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:14,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470097962] [2021-03-10 21:26:14,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:14,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470097962] [2021-03-10 21:26:14,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599041979] [2021-03-10 21:26:14,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:14,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:26:14,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:14,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:14,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:14,422 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 18 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:26:14,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:14,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-03-10 21:26:14,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140491787] [2021-03-10 21:26:14,423 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:14,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:14,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:14,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:14,423 INFO L87 Difference]: Start difference. First operand 17756 states and 52811 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:14,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:14,543 INFO L93 Difference]: Finished difference Result 18147 states and 53443 transitions. [2021-03-10 21:26:14,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:26:14,544 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:14,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:14,567 INFO L225 Difference]: With dead ends: 18147 [2021-03-10 21:26:14,567 INFO L226 Difference]: Without dead ends: 18147 [2021-03-10 21:26:14,567 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:14,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18147 states. [2021-03-10 21:26:14,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18147 to 17763. [2021-03-10 21:26:14,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17763 states, 17762 states have (on average 2.9734827159103703) internal successors, (52815), 17762 states have internal predecessors, (52815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:14,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17763 states to 17763 states and 52815 transitions. [2021-03-10 21:26:14,823 INFO L78 Accepts]: Start accepts. Automaton has 17763 states and 52815 transitions. Word has length 23 [2021-03-10 21:26:14,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:14,823 INFO L480 AbstractCegarLoop]: Abstraction has 17763 states and 52815 transitions. [2021-03-10 21:26:14,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:14,823 INFO L276 IsEmpty]: Start isEmpty. Operand 17763 states and 52815 transitions. [2021-03-10 21:26:14,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:14,837 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:14,837 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:15,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3326 [2021-03-10 21:26:15,037 INFO L428 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:15,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:15,037 INFO L82 PathProgramCache]: Analyzing trace with hash -504515806, now seen corresponding path program 318 times [2021-03-10 21:26:15,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:15,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899909237] [2021-03-10 21:26:15,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:15,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:15,098 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:15,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899909237] [2021-03-10 21:26:15,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056667014] [2021-03-10 21:26:15,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:15,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:26:15,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:15,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:26:15,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:15,162 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:15,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:15,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:26:15,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497517628] [2021-03-10 21:26:15,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:15,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:15,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:15,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:15,162 INFO L87 Difference]: Start difference. First operand 17763 states and 52815 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:15,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:15,371 INFO L93 Difference]: Finished difference Result 18064 states and 53237 transitions. [2021-03-10 21:26:15,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:26:15,372 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:15,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:15,394 INFO L225 Difference]: With dead ends: 18064 [2021-03-10 21:26:15,394 INFO L226 Difference]: Without dead ends: 18059 [2021-03-10 21:26:15,394 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 117.1ms TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:26:15,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18059 states. [2021-03-10 21:26:15,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18059 to 17747. [2021-03-10 21:26:15,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17747 states, 17746 states have (on average 2.971599233630114) internal successors, (52734), 17746 states have internal predecessors, (52734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:15,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17747 states to 17747 states and 52734 transitions. [2021-03-10 21:26:15,637 INFO L78 Accepts]: Start accepts. Automaton has 17747 states and 52734 transitions. Word has length 23 [2021-03-10 21:26:15,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:15,637 INFO L480 AbstractCegarLoop]: Abstraction has 17747 states and 52734 transitions. [2021-03-10 21:26:15,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:15,637 INFO L276 IsEmpty]: Start isEmpty. Operand 17747 states and 52734 transitions. [2021-03-10 21:26:15,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:15,651 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:15,651 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:15,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3327,320 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:15,852 INFO L428 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:15,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:15,852 INFO L82 PathProgramCache]: Analyzing trace with hash 984889190, now seen corresponding path program 319 times [2021-03-10 21:26:15,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:15,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031101339] [2021-03-10 21:26:15,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:15,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:15,918 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:15,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031101339] [2021-03-10 21:26:15,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229550731] [2021-03-10 21:26:15,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:15,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:15,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:15,985 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:26:15,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:15,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-03-10 21:26:15,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553718119] [2021-03-10 21:26:15,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:26:15,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:15,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:26:15,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:26:15,986 INFO L87 Difference]: Start difference. First operand 17747 states and 52734 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:16,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:16,217 INFO L93 Difference]: Finished difference Result 18047 states and 53156 transitions. [2021-03-10 21:26:16,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:26:16,217 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:16,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:16,240 INFO L225 Difference]: With dead ends: 18047 [2021-03-10 21:26:16,240 INFO L226 Difference]: Without dead ends: 18039 [2021-03-10 21:26:16,240 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 135.0ms TimeCoverageRelationStatistics Valid=222, Invalid=428, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:26:16,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18039 states. [2021-03-10 21:26:16,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18039 to 17721. [2021-03-10 21:26:16,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17721 states, 17720 states have (on average 2.970316027088036) internal successors, (52634), 17720 states have internal predecessors, (52634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:16,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17721 states to 17721 states and 52634 transitions. [2021-03-10 21:26:16,574 INFO L78 Accepts]: Start accepts. Automaton has 17721 states and 52634 transitions. Word has length 23 [2021-03-10 21:26:16,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:16,574 INFO L480 AbstractCegarLoop]: Abstraction has 17721 states and 52634 transitions. [2021-03-10 21:26:16,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:16,574 INFO L276 IsEmpty]: Start isEmpty. Operand 17721 states and 52634 transitions. [2021-03-10 21:26:16,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:16,589 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:16,589 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:16,790 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3328,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:16,790 INFO L428 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:16,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:16,790 INFO L82 PathProgramCache]: Analyzing trace with hash -88196190, now seen corresponding path program 320 times [2021-03-10 21:26:16,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:16,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732123436] [2021-03-10 21:26:16,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:16,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:16,868 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:16,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732123436] [2021-03-10 21:26:16,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880772246] [2021-03-10 21:26:16,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:16,887 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:16,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:16,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:16,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:16,935 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:16,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:16,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-03-10 21:26:16,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241119107] [2021-03-10 21:26:16,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:26:16,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:16,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:26:16,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:16,936 INFO L87 Difference]: Start difference. First operand 17721 states and 52634 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:17,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:17,172 INFO L93 Difference]: Finished difference Result 18021 states and 53057 transitions. [2021-03-10 21:26:17,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:26:17,173 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:17,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:17,194 INFO L225 Difference]: With dead ends: 18021 [2021-03-10 21:26:17,195 INFO L226 Difference]: Without dead ends: 18012 [2021-03-10 21:26:17,195 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 151.6ms TimeCoverageRelationStatistics Valid=253, Invalid=503, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:26:17,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18012 states. [2021-03-10 21:26:17,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18012 to 17705. [2021-03-10 21:26:17,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17705 states, 17704 states have (on average 2.9697808404880255) internal successors, (52577), 17704 states have internal predecessors, (52577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:17,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17705 states to 17705 states and 52577 transitions. [2021-03-10 21:26:17,430 INFO L78 Accepts]: Start accepts. Automaton has 17705 states and 52577 transitions. Word has length 23 [2021-03-10 21:26:17,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:17,430 INFO L480 AbstractCegarLoop]: Abstraction has 17705 states and 52577 transitions. [2021-03-10 21:26:17,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:17,430 INFO L276 IsEmpty]: Start isEmpty. Operand 17705 states and 52577 transitions. [2021-03-10 21:26:17,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:17,443 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:17,443 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:17,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3329 [2021-03-10 21:26:17,644 INFO L428 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:17,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:17,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1005895398, now seen corresponding path program 321 times [2021-03-10 21:26:17,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:17,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454958221] [2021-03-10 21:26:17,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:17,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:17,721 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:17,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454958221] [2021-03-10 21:26:17,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403370620] [2021-03-10 21:26:17,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:17,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:26:17,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:17,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:26:17,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:17,792 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:17,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:17,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:26:17,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434484173] [2021-03-10 21:26:17,793 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:26:17,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:17,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:26:17,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:17,793 INFO L87 Difference]: Start difference. First operand 17705 states and 52577 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:18,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:18,024 INFO L93 Difference]: Finished difference Result 19443 states and 56893 transitions. [2021-03-10 21:26:18,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:26:18,024 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:18,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:18,051 INFO L225 Difference]: With dead ends: 19443 [2021-03-10 21:26:18,051 INFO L226 Difference]: Without dead ends: 19435 [2021-03-10 21:26:18,051 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 161.2ms TimeCoverageRelationStatistics Valid=243, Invalid=513, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:26:18,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19435 states. [2021-03-10 21:26:18,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19435 to 17759. [2021-03-10 21:26:18,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17759 states, 17758 states have (on average 2.968802793107332) internal successors, (52720), 17758 states have internal predecessors, (52720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:18,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17759 states to 17759 states and 52720 transitions. [2021-03-10 21:26:18,300 INFO L78 Accepts]: Start accepts. Automaton has 17759 states and 52720 transitions. Word has length 23 [2021-03-10 21:26:18,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:18,300 INFO L480 AbstractCegarLoop]: Abstraction has 17759 states and 52720 transitions. [2021-03-10 21:26:18,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:18,300 INFO L276 IsEmpty]: Start isEmpty. Operand 17759 states and 52720 transitions. [2021-03-10 21:26:18,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:18,314 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:18,315 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:18,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 323 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3330 [2021-03-10 21:26:18,515 INFO L428 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:18,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:18,515 INFO L82 PathProgramCache]: Analyzing trace with hash 562996258, now seen corresponding path program 322 times [2021-03-10 21:26:18,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:18,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615758709] [2021-03-10 21:26:18,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:18,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:18,606 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:18,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615758709] [2021-03-10 21:26:18,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561612065] [2021-03-10 21:26:18,607 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:18,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:18,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:18,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:18,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:18,674 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:18,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:18,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-03-10 21:26:18,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7114786] [2021-03-10 21:26:18,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:26:18,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:18,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:26:18,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:18,674 INFO L87 Difference]: Start difference. First operand 17759 states and 52720 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:18,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:18,928 INFO L93 Difference]: Finished difference Result 19462 states and 56909 transitions. [2021-03-10 21:26:18,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:26:18,929 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:18,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:18,954 INFO L225 Difference]: With dead ends: 19462 [2021-03-10 21:26:18,954 INFO L226 Difference]: Without dead ends: 19452 [2021-03-10 21:26:18,954 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 180.8ms TimeCoverageRelationStatistics Valid=278, Invalid=592, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:26:18,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19452 states. [2021-03-10 21:26:19,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19452 to 17815. [2021-03-10 21:26:19,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17815 states, 17814 states have (on average 2.967778152015269) internal successors, (52868), 17814 states have internal predecessors, (52868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:19,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17815 states to 17815 states and 52868 transitions. [2021-03-10 21:26:19,209 INFO L78 Accepts]: Start accepts. Automaton has 17815 states and 52868 transitions. Word has length 23 [2021-03-10 21:26:19,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:19,209 INFO L480 AbstractCegarLoop]: Abstraction has 17815 states and 52868 transitions. [2021-03-10 21:26:19,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:19,209 INFO L276 IsEmpty]: Start isEmpty. Operand 17815 states and 52868 transitions. [2021-03-10 21:26:19,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:19,223 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:19,223 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:19,423 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3331 [2021-03-10 21:26:19,423 INFO L428 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:19,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:19,424 INFO L82 PathProgramCache]: Analyzing trace with hash -281975194, now seen corresponding path program 323 times [2021-03-10 21:26:19,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:19,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87293887] [2021-03-10 21:26:19,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:19,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:19,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87293887] [2021-03-10 21:26:19,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627825826] [2021-03-10 21:26:19,513 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:19,534 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:26:19,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:19,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:19,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:19,583 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:19,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:19,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-03-10 21:26:19,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408178925] [2021-03-10 21:26:19,584 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:26:19,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:19,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:26:19,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:19,584 INFO L87 Difference]: Start difference. First operand 17815 states and 52868 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:19,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:19,924 INFO L93 Difference]: Finished difference Result 18858 states and 55259 transitions. [2021-03-10 21:26:19,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:26:19,924 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:19,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:19,948 INFO L225 Difference]: With dead ends: 18858 [2021-03-10 21:26:19,948 INFO L226 Difference]: Without dead ends: 18846 [2021-03-10 21:26:19,949 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 273.0ms TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:26:19,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18846 states. [2021-03-10 21:26:20,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18846 to 17815. [2021-03-10 21:26:20,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17815 states, 17814 states have (on average 2.967497473896935) internal successors, (52863), 17814 states have internal predecessors, (52863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:20,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17815 states to 17815 states and 52863 transitions. [2021-03-10 21:26:20,185 INFO L78 Accepts]: Start accepts. Automaton has 17815 states and 52863 transitions. Word has length 23 [2021-03-10 21:26:20,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:20,185 INFO L480 AbstractCegarLoop]: Abstraction has 17815 states and 52863 transitions. [2021-03-10 21:26:20,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:20,185 INFO L276 IsEmpty]: Start isEmpty. Operand 17815 states and 52863 transitions. [2021-03-10 21:26:20,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:20,199 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:20,199 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:20,399 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3332,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:20,399 INFO L428 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:20,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:20,399 INFO L82 PathProgramCache]: Analyzing trace with hash 614484244, now seen corresponding path program 324 times [2021-03-10 21:26:20,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:20,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769370069] [2021-03-10 21:26:20,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:20,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:20,482 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 21 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:20,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769370069] [2021-03-10 21:26:20,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919731871] [2021-03-10 21:26:20,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:20,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:26:20,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:20,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:26:20,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:20,548 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 22 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:20,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:20,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:26:20,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799892862] [2021-03-10 21:26:20,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:26:20,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:20,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:26:20,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:20,549 INFO L87 Difference]: Start difference. First operand 17815 states and 52863 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:20,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:20,793 INFO L93 Difference]: Finished difference Result 18134 states and 53387 transitions. [2021-03-10 21:26:20,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:26:20,794 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:20,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:20,818 INFO L225 Difference]: With dead ends: 18134 [2021-03-10 21:26:20,818 INFO L226 Difference]: Without dead ends: 18122 [2021-03-10 21:26:20,818 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 154.3ms TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:26:20,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18122 states. [2021-03-10 21:26:21,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18122 to 17754. [2021-03-10 21:26:21,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17754 states, 17753 states have (on average 2.9667661803638823) internal successors, (52669), 17753 states have internal predecessors, (52669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:21,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17754 states to 17754 states and 52669 transitions. [2021-03-10 21:26:21,079 INFO L78 Accepts]: Start accepts. Automaton has 17754 states and 52669 transitions. Word has length 23 [2021-03-10 21:26:21,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:21,079 INFO L480 AbstractCegarLoop]: Abstraction has 17754 states and 52669 transitions. [2021-03-10 21:26:21,080 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:21,080 INFO L276 IsEmpty]: Start isEmpty. Operand 17754 states and 52669 transitions. [2021-03-10 21:26:21,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:21,094 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:21,094 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:21,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3333,326 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:21,294 INFO L428 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:21,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:21,294 INFO L82 PathProgramCache]: Analyzing trace with hash 171585104, now seen corresponding path program 325 times [2021-03-10 21:26:21,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:21,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211077412] [2021-03-10 21:26:21,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:21,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:21,385 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:21,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211077412] [2021-03-10 21:26:21,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908418000] [2021-03-10 21:26:21,385 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:21,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:21,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:21,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:21,447 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:21,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:21,447 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-03-10 21:26:21,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499565707] [2021-03-10 21:26:21,447 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:26:21,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:21,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:26:21,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:21,447 INFO L87 Difference]: Start difference. First operand 17754 states and 52669 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:21,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:21,697 INFO L93 Difference]: Finished difference Result 18086 states and 53214 transitions. [2021-03-10 21:26:21,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:26:21,697 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:21,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:21,718 INFO L225 Difference]: With dead ends: 18086 [2021-03-10 21:26:21,718 INFO L226 Difference]: Without dead ends: 18076 [2021-03-10 21:26:21,718 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 175.6ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:26:21,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18076 states. [2021-03-10 21:26:21,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18076 to 17750. [2021-03-10 21:26:21,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17750 states, 17749 states have (on average 2.966476984618852) internal successors, (52652), 17749 states have internal predecessors, (52652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:21,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17750 states to 17750 states and 52652 transitions. [2021-03-10 21:26:21,969 INFO L78 Accepts]: Start accepts. Automaton has 17750 states and 52652 transitions. Word has length 23 [2021-03-10 21:26:21,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:21,969 INFO L480 AbstractCegarLoop]: Abstraction has 17750 states and 52652 transitions. [2021-03-10 21:26:21,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:21,969 INFO L276 IsEmpty]: Start isEmpty. Operand 17750 states and 52652 transitions. [2021-03-10 21:26:21,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:21,983 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:21,983 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:22,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3334,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:22,184 INFO L428 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:22,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:22,184 INFO L82 PathProgramCache]: Analyzing trace with hash -673386348, now seen corresponding path program 326 times [2021-03-10 21:26:22,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:22,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60060143] [2021-03-10 21:26:22,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:22,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:22,310 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:22,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60060143] [2021-03-10 21:26:22,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043363861] [2021-03-10 21:26:22,311 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:26:22,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:22,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:22,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:22,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:22,385 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:22,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:22,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-03-10 21:26:22,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069434272] [2021-03-10 21:26:22,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:26:22,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:22,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:26:22,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:22,386 INFO L87 Difference]: Start difference. First operand 17750 states and 52652 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:22,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:22,705 INFO L93 Difference]: Finished difference Result 18572 states and 54522 transitions. [2021-03-10 21:26:22,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:26:22,706 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:22,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:22,730 INFO L225 Difference]: With dead ends: 18572 [2021-03-10 21:26:22,730 INFO L226 Difference]: Without dead ends: 18560 [2021-03-10 21:26:22,730 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 256.5ms TimeCoverageRelationStatistics Valid=315, Invalid=677, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:26:22,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18560 states. [2021-03-10 21:26:22,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18560 to 17743. [2021-03-10 21:26:22,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17743 states, 17742 states have (on average 2.966463758313606) internal successors, (52631), 17742 states have internal predecessors, (52631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:23,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17743 states to 17743 states and 52631 transitions. [2021-03-10 21:26:23,017 INFO L78 Accepts]: Start accepts. Automaton has 17743 states and 52631 transitions. Word has length 23 [2021-03-10 21:26:23,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:23,017 INFO L480 AbstractCegarLoop]: Abstraction has 17743 states and 52631 transitions. [2021-03-10 21:26:23,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:23,017 INFO L276 IsEmpty]: Start isEmpty. Operand 17743 states and 52631 transitions. [2021-03-10 21:26:23,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:23,031 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:23,031 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:23,231 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3335,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:23,232 INFO L428 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:23,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:23,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1862290286, now seen corresponding path program 327 times [2021-03-10 21:26:23,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:23,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144896296] [2021-03-10 21:26:23,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:23,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:23,328 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:23,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144896296] [2021-03-10 21:26:23,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524558474] [2021-03-10 21:26:23,328 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:23,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:26:23,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:23,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:26:23,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:23,392 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:23,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:23,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-03-10 21:26:23,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127682655] [2021-03-10 21:26:23,393 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:26:23,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:23,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:26:23,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:23,393 INFO L87 Difference]: Start difference. First operand 17743 states and 52631 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:23,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:23,628 INFO L93 Difference]: Finished difference Result 19073 states and 55761 transitions. [2021-03-10 21:26:23,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:26:23,629 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:23,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:23,653 INFO L225 Difference]: With dead ends: 19073 [2021-03-10 21:26:23,653 INFO L226 Difference]: Without dead ends: 19061 [2021-03-10 21:26:23,653 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 180.4ms TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:26:23,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19061 states. [2021-03-10 21:26:23,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19061 to 17743. [2021-03-10 21:26:23,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17743 states, 17742 states have (on average 2.966294668019389) internal successors, (52628), 17742 states have internal predecessors, (52628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:23,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17743 states to 17743 states and 52628 transitions. [2021-03-10 21:26:23,893 INFO L78 Accepts]: Start accepts. Automaton has 17743 states and 52628 transitions. Word has length 23 [2021-03-10 21:26:23,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:23,893 INFO L480 AbstractCegarLoop]: Abstraction has 17743 states and 52628 transitions. [2021-03-10 21:26:23,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:23,893 INFO L276 IsEmpty]: Start isEmpty. Operand 17743 states and 52628 transitions. [2021-03-10 21:26:23,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:23,906 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:23,906 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:24,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3336,329 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:24,107 INFO L428 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:24,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:24,107 INFO L82 PathProgramCache]: Analyzing trace with hash -71954318, now seen corresponding path program 328 times [2021-03-10 21:26:24,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:24,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091780052] [2021-03-10 21:26:24,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:24,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:24,166 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:24,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091780052] [2021-03-10 21:26:24,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037198153] [2021-03-10 21:26:24,166 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:24,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:24,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:24,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:26:24,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:24,234 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:26:24,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:24,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-03-10 21:26:24,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298124741] [2021-03-10 21:26:24,235 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:26:24,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:24,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:26:24,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:26:24,235 INFO L87 Difference]: Start difference. First operand 17743 states and 52628 transitions. Second operand has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:24,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:24,352 INFO L93 Difference]: Finished difference Result 18066 states and 53107 transitions. [2021-03-10 21:26:24,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:26:24,353 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:24,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:24,377 INFO L225 Difference]: With dead ends: 18066 [2021-03-10 21:26:24,377 INFO L226 Difference]: Without dead ends: 18064 [2021-03-10 21:26:24,377 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:24,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18064 states. [2021-03-10 21:26:24,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18064 to 17735. [2021-03-10 21:26:24,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17735 states, 17734 states have (on average 2.966110296605391) internal successors, (52601), 17734 states have internal predecessors, (52601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:24,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17735 states to 17735 states and 52601 transitions. [2021-03-10 21:26:24,623 INFO L78 Accepts]: Start accepts. Automaton has 17735 states and 52601 transitions. Word has length 23 [2021-03-10 21:26:24,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:24,623 INFO L480 AbstractCegarLoop]: Abstraction has 17735 states and 52601 transitions. [2021-03-10 21:26:24,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 1.9230769230769231) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:24,623 INFO L276 IsEmpty]: Start isEmpty. Operand 17735 states and 52601 transitions. [2021-03-10 21:26:24,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:24,636 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:24,636 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:24,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3337,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:24,837 INFO L428 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:24,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:24,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1673500372, now seen corresponding path program 329 times [2021-03-10 21:26:24,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:24,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83630986] [2021-03-10 21:26:24,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:24,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:24,895 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:24,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83630986] [2021-03-10 21:26:24,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793967579] [2021-03-10 21:26:24,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:24,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:26:24,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:24,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:24,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:26:24,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:24,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-03-10 21:26:24,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078824575] [2021-03-10 21:26:24,971 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:24,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:24,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:24,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:24,971 INFO L87 Difference]: Start difference. First operand 17735 states and 52601 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:25,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:25,088 INFO L93 Difference]: Finished difference Result 18041 states and 53023 transitions. [2021-03-10 21:26:25,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:26:25,089 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:25,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:25,110 INFO L225 Difference]: With dead ends: 18041 [2021-03-10 21:26:25,110 INFO L226 Difference]: Without dead ends: 18041 [2021-03-10 21:26:25,111 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:25,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18041 states. [2021-03-10 21:26:25,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18041 to 17719. [2021-03-10 21:26:25,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17719 states, 17718 states have (on average 2.9652895360650184) internal successors, (52539), 17718 states have internal predecessors, (52539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:25,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17719 states to 17719 states and 52539 transitions. [2021-03-10 21:26:25,360 INFO L78 Accepts]: Start accepts. Automaton has 17719 states and 52539 transitions. Word has length 23 [2021-03-10 21:26:25,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:25,361 INFO L480 AbstractCegarLoop]: Abstraction has 17719 states and 52539 transitions. [2021-03-10 21:26:25,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:25,361 INFO L276 IsEmpty]: Start isEmpty. Operand 17719 states and 52539 transitions. [2021-03-10 21:26:25,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:25,374 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:25,374 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:25,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3338 [2021-03-10 21:26:25,574 INFO L428 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:25,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:25,575 INFO L82 PathProgramCache]: Analyzing trace with hash -910853616, now seen corresponding path program 330 times [2021-03-10 21:26:25,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:25,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140581243] [2021-03-10 21:26:25,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:25,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:25,639 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:25,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140581243] [2021-03-10 21:26:25,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557835929] [2021-03-10 21:26:25,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:25,660 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:26:25,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:25,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:26:25,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:25,708 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:25,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:25,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:26:25,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238861669] [2021-03-10 21:26:25,708 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:25,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:25,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:25,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:25,709 INFO L87 Difference]: Start difference. First operand 17719 states and 52539 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:25,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:25,905 INFO L93 Difference]: Finished difference Result 18030 states and 52973 transitions. [2021-03-10 21:26:25,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:26:25,905 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:25,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:25,928 INFO L225 Difference]: With dead ends: 18030 [2021-03-10 21:26:25,928 INFO L226 Difference]: Without dead ends: 18027 [2021-03-10 21:26:25,928 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 121.9ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:26:25,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18027 states. [2021-03-10 21:26:26,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18027 to 17710. [2021-03-10 21:26:26,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17710 states, 17709 states have (on average 2.963973121011915) internal successors, (52489), 17709 states have internal predecessors, (52489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:26,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17710 states to 17710 states and 52489 transitions. [2021-03-10 21:26:26,215 INFO L78 Accepts]: Start accepts. Automaton has 17710 states and 52489 transitions. Word has length 23 [2021-03-10 21:26:26,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:26,215 INFO L480 AbstractCegarLoop]: Abstraction has 17710 states and 52489 transitions. [2021-03-10 21:26:26,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:26,215 INFO L276 IsEmpty]: Start isEmpty. Operand 17710 states and 52489 transitions. [2021-03-10 21:26:26,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:26,229 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:26,229 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:26,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3339,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:26,430 INFO L428 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:26,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:26,430 INFO L82 PathProgramCache]: Analyzing trace with hash 578551380, now seen corresponding path program 331 times [2021-03-10 21:26:26,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:26,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524681893] [2021-03-10 21:26:26,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:26,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:26,501 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:26,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524681893] [2021-03-10 21:26:26,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262378168] [2021-03-10 21:26:26,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:26,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:26,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:26,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:26,566 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:26,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:26,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-03-10 21:26:26,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33935373] [2021-03-10 21:26:26,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:26:26,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:26,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:26:26,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:26:26,567 INFO L87 Difference]: Start difference. First operand 17710 states and 52489 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:26,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:26,785 INFO L93 Difference]: Finished difference Result 18025 states and 52930 transitions. [2021-03-10 21:26:26,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:26:26,785 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:26,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:26,807 INFO L225 Difference]: With dead ends: 18025 [2021-03-10 21:26:26,807 INFO L226 Difference]: Without dead ends: 18021 [2021-03-10 21:26:26,808 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 134.8ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:26:26,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18021 states. [2021-03-10 21:26:27,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18021 to 17710. [2021-03-10 21:26:27,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17710 states, 17709 states have (on average 2.9626178779151844) internal successors, (52465), 17709 states have internal predecessors, (52465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:27,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17710 states to 17710 states and 52465 transitions. [2021-03-10 21:26:27,049 INFO L78 Accepts]: Start accepts. Automaton has 17710 states and 52465 transitions. Word has length 23 [2021-03-10 21:26:27,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:27,049 INFO L480 AbstractCegarLoop]: Abstraction has 17710 states and 52465 transitions. [2021-03-10 21:26:27,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:27,049 INFO L276 IsEmpty]: Start isEmpty. Operand 17710 states and 52465 transitions. [2021-03-10 21:26:27,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:27,063 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:27,063 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:27,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3340 [2021-03-10 21:26:27,263 INFO L428 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:27,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:27,263 INFO L82 PathProgramCache]: Analyzing trace with hash -494534000, now seen corresponding path program 332 times [2021-03-10 21:26:27,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:27,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845349230] [2021-03-10 21:26:27,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:27,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:27,340 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:27,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845349230] [2021-03-10 21:26:27,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269082616] [2021-03-10 21:26:27,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:27,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:27,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:27,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:27,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:27,401 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:26:27,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:27,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-03-10 21:26:27,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283959213] [2021-03-10 21:26:27,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:26:27,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:27,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:26:27,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:26:27,402 INFO L87 Difference]: Start difference. First operand 17710 states and 52465 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:27,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:27,605 INFO L93 Difference]: Finished difference Result 20107 states and 58655 transitions. [2021-03-10 21:26:27,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:26:27,606 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:27,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:27,631 INFO L225 Difference]: With dead ends: 20107 [2021-03-10 21:26:27,631 INFO L226 Difference]: Without dead ends: 20101 [2021-03-10 21:26:27,631 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 135.5ms TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:26:27,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20101 states. [2021-03-10 21:26:27,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20101 to 17710. [2021-03-10 21:26:27,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17710 states, 17709 states have (on average 2.962222598678638) internal successors, (52458), 17709 states have internal predecessors, (52458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:27,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17710 states to 17710 states and 52458 transitions. [2021-03-10 21:26:27,892 INFO L78 Accepts]: Start accepts. Automaton has 17710 states and 52458 transitions. Word has length 23 [2021-03-10 21:26:27,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:27,892 INFO L480 AbstractCegarLoop]: Abstraction has 17710 states and 52458 transitions. [2021-03-10 21:26:27,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:27,892 INFO L276 IsEmpty]: Start isEmpty. Operand 17710 states and 52458 transitions. [2021-03-10 21:26:27,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:27,906 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:27,906 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:28,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 334 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3341 [2021-03-10 21:26:28,107 INFO L428 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:28,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:28,107 INFO L82 PathProgramCache]: Analyzing trace with hash 599557588, now seen corresponding path program 333 times [2021-03-10 21:26:28,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:28,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713406955] [2021-03-10 21:26:28,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:28,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:28,193 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:28,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713406955] [2021-03-10 21:26:28,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259008755] [2021-03-10 21:26:28,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:28,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:26:28,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:28,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:26:28,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 25 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:28,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:28,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:26:28,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558860416] [2021-03-10 21:26:28,260 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:26:28,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:28,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:26:28,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:28,260 INFO L87 Difference]: Start difference. First operand 17710 states and 52458 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:28,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:28,496 INFO L93 Difference]: Finished difference Result 20128 states and 58673 transitions. [2021-03-10 21:26:28,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:26:28,497 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:28,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:28,521 INFO L225 Difference]: With dead ends: 20128 [2021-03-10 21:26:28,521 INFO L226 Difference]: Without dead ends: 20120 [2021-03-10 21:26:28,521 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 157.7ms TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:26:28,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20120 states. [2021-03-10 21:26:28,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20120 to 17811. [2021-03-10 21:26:28,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17811 states, 17810 states have (on average 2.9632229084783828) internal successors, (52775), 17810 states have internal predecessors, (52775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:28,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17811 states to 17811 states and 52775 transitions. [2021-03-10 21:26:28,870 INFO L78 Accepts]: Start accepts. Automaton has 17811 states and 52775 transitions. Word has length 23 [2021-03-10 21:26:28,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:28,870 INFO L480 AbstractCegarLoop]: Abstraction has 17811 states and 52775 transitions. [2021-03-10 21:26:28,870 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:28,870 INFO L276 IsEmpty]: Start isEmpty. Operand 17811 states and 52775 transitions. [2021-03-10 21:26:28,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:28,883 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:28,883 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:29,083 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3342 [2021-03-10 21:26:29,084 INFO L428 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:29,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:29,084 INFO L82 PathProgramCache]: Analyzing trace with hash 156658448, now seen corresponding path program 334 times [2021-03-10 21:26:29,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:29,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593243035] [2021-03-10 21:26:29,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:29,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:29,178 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:29,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593243035] [2021-03-10 21:26:29,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367055319] [2021-03-10 21:26:29,178 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:29,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:29,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:29,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:29,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:29,244 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:26:29,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:29,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-03-10 21:26:29,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815738072] [2021-03-10 21:26:29,245 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:26:29,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:29,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:26:29,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:29,245 INFO L87 Difference]: Start difference. First operand 17811 states and 52775 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:29,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:29,502 INFO L93 Difference]: Finished difference Result 19877 states and 57902 transitions. [2021-03-10 21:26:29,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:26:29,503 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:29,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:29,529 INFO L225 Difference]: With dead ends: 19877 [2021-03-10 21:26:29,530 INFO L226 Difference]: Without dead ends: 19867 [2021-03-10 21:26:29,530 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 192.3ms TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:26:29,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19867 states. [2021-03-10 21:26:29,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19867 to 17811. [2021-03-10 21:26:29,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17811 states, 17810 states have (on average 2.963054463784391) internal successors, (52772), 17810 states have internal predecessors, (52772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:29,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17811 states to 17811 states and 52772 transitions. [2021-03-10 21:26:29,833 INFO L78 Accepts]: Start accepts. Automaton has 17811 states and 52772 transitions. Word has length 23 [2021-03-10 21:26:29,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:29,833 INFO L480 AbstractCegarLoop]: Abstraction has 17811 states and 52772 transitions. [2021-03-10 21:26:29,833 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:29,833 INFO L276 IsEmpty]: Start isEmpty. Operand 17811 states and 52772 transitions. [2021-03-10 21:26:29,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:29,847 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:29,847 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:30,047 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3343,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:30,047 INFO L428 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:30,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:30,048 INFO L82 PathProgramCache]: Analyzing trace with hash -688313004, now seen corresponding path program 335 times [2021-03-10 21:26:30,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:30,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747265371] [2021-03-10 21:26:30,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:30,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:30,154 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:30,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747265371] [2021-03-10 21:26:30,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622475795] [2021-03-10 21:26:30,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:30,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:26:30,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:30,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:26:30,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:30,222 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:30,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:30,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-03-10 21:26:30,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848177393] [2021-03-10 21:26:30,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:26:30,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:30,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:26:30,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:30,223 INFO L87 Difference]: Start difference. First operand 17811 states and 52772 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:30,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:30,483 INFO L93 Difference]: Finished difference Result 19900 states and 57925 transitions. [2021-03-10 21:26:30,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:26:30,484 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:30,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:30,508 INFO L225 Difference]: With dead ends: 19900 [2021-03-10 21:26:30,508 INFO L226 Difference]: Without dead ends: 19888 [2021-03-10 21:26:30,509 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 209.0ms TimeCoverageRelationStatistics Valid=297, Invalid=633, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:26:30,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19888 states. [2021-03-10 21:26:30,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19888 to 17820. [2021-03-10 21:26:30,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17820 states, 17819 states have (on average 2.9629047645771367) internal successors, (52796), 17819 states have internal predecessors, (52796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:30,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17820 states to 17820 states and 52796 transitions. [2021-03-10 21:26:30,766 INFO L78 Accepts]: Start accepts. Automaton has 17820 states and 52796 transitions. Word has length 23 [2021-03-10 21:26:30,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:30,766 INFO L480 AbstractCegarLoop]: Abstraction has 17820 states and 52796 transitions. [2021-03-10 21:26:30,766 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:30,766 INFO L276 IsEmpty]: Start isEmpty. Operand 17820 states and 52796 transitions. [2021-03-10 21:26:30,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:30,780 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:30,780 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:30,980 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3344,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:30,981 INFO L428 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:30,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:30,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1112624240, now seen corresponding path program 336 times [2021-03-10 21:26:30,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:30,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915382840] [2021-03-10 21:26:30,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:30,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:31,084 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:31,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915382840] [2021-03-10 21:26:31,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324036015] [2021-03-10 21:26:31,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:31,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:26:31,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:31,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:26:31,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:31,149 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:31,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:31,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-03-10 21:26:31,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130290645] [2021-03-10 21:26:31,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:26:31,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:31,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:26:31,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:31,150 INFO L87 Difference]: Start difference. First operand 17820 states and 52796 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:31,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:31,488 INFO L93 Difference]: Finished difference Result 18844 states and 55132 transitions. [2021-03-10 21:26:31,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:26:31,489 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:31,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:31,514 INFO L225 Difference]: With dead ends: 18844 [2021-03-10 21:26:31,514 INFO L226 Difference]: Without dead ends: 18830 [2021-03-10 21:26:31,514 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 262.8ms TimeCoverageRelationStatistics Valid=384, Invalid=806, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:26:31,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18830 states. [2021-03-10 21:26:31,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18830 to 17820. [2021-03-10 21:26:31,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17820 states, 17819 states have (on average 2.9627925248330436) internal successors, (52794), 17819 states have internal predecessors, (52794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:31,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17820 states to 17820 states and 52794 transitions. [2021-03-10 21:26:31,763 INFO L78 Accepts]: Start accepts. Automaton has 17820 states and 52794 transitions. Word has length 23 [2021-03-10 21:26:31,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:31,763 INFO L480 AbstractCegarLoop]: Abstraction has 17820 states and 52794 transitions. [2021-03-10 21:26:31,763 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:31,763 INFO L276 IsEmpty]: Start isEmpty. Operand 17820 states and 52794 transitions. [2021-03-10 21:26:31,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:31,778 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:31,778 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:31,978 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3345 [2021-03-10 21:26:31,978 INFO L428 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:31,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:31,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1769822746, now seen corresponding path program 337 times [2021-03-10 21:26:31,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:31,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213616996] [2021-03-10 21:26:31,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:31,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:32,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213616996] [2021-03-10 21:26:32,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897011728] [2021-03-10 21:26:32,062 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:32,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:32,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:26:32,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:32,132 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 43 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:32,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:32,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:26:32,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449104823] [2021-03-10 21:26:32,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:26:32,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:32,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:26:32,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:32,133 INFO L87 Difference]: Start difference. First operand 17820 states and 52794 transitions. Second operand has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:32,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:32,338 INFO L93 Difference]: Finished difference Result 17961 states and 52999 transitions. [2021-03-10 21:26:32,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:26:32,339 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:32,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:32,360 INFO L225 Difference]: With dead ends: 17961 [2021-03-10 21:26:32,360 INFO L226 Difference]: Without dead ends: 17955 [2021-03-10 21:26:32,360 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 150.9ms TimeCoverageRelationStatistics Valid=223, Invalid=427, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:26:32,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17955 states. [2021-03-10 21:26:32,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17955 to 17760. [2021-03-10 21:26:32,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17760 states, 17759 states have (on average 2.962160031533307) internal successors, (52605), 17759 states have internal predecessors, (52605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:32,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17760 states to 17760 states and 52605 transitions. [2021-03-10 21:26:32,589 INFO L78 Accepts]: Start accepts. Automaton has 17760 states and 52605 transitions. Word has length 23 [2021-03-10 21:26:32,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:32,590 INFO L480 AbstractCegarLoop]: Abstraction has 17760 states and 52605 transitions. [2021-03-10 21:26:32,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5625) internal successors, (25), 15 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:32,590 INFO L276 IsEmpty]: Start isEmpty. Operand 17760 states and 52605 transitions. [2021-03-10 21:26:32,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:32,603 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:32,603 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:32,803 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3346,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:32,803 INFO L428 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:32,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:32,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1074657958, now seen corresponding path program 338 times [2021-03-10 21:26:32,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:32,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337833185] [2021-03-10 21:26:32,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:32,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:32,985 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:32,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337833185] [2021-03-10 21:26:32,986 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485468704] [2021-03-10 21:26:32,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:33,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:33,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:33,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:33,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:33,048 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 33 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:33,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:33,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-03-10 21:26:33,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945573791] [2021-03-10 21:26:33,048 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:26:33,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:33,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:26:33,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:33,049 INFO L87 Difference]: Start difference. First operand 17760 states and 52605 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:33,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:33,290 INFO L93 Difference]: Finished difference Result 18138 states and 53420 transitions. [2021-03-10 21:26:33,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:26:33,291 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:33,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:33,314 INFO L225 Difference]: With dead ends: 18138 [2021-03-10 21:26:33,314 INFO L226 Difference]: Without dead ends: 18126 [2021-03-10 21:26:33,314 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 268.0ms TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:26:33,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18126 states. [2021-03-10 21:26:33,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18126 to 17755. [2021-03-10 21:26:33,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17755 states, 17754 states have (on average 2.9613608200968797) internal successors, (52576), 17754 states have internal predecessors, (52576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:33,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17755 states to 17755 states and 52576 transitions. [2021-03-10 21:26:33,560 INFO L78 Accepts]: Start accepts. Automaton has 17755 states and 52576 transitions. Word has length 23 [2021-03-10 21:26:33,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:33,560 INFO L480 AbstractCegarLoop]: Abstraction has 17755 states and 52576 transitions. [2021-03-10 21:26:33,561 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:33,561 INFO L276 IsEmpty]: Start isEmpty. Operand 17755 states and 52576 transitions. [2021-03-10 21:26:33,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:33,573 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:33,574 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:33,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3347 [2021-03-10 21:26:33,774 INFO L428 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:33,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:33,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1282166328, now seen corresponding path program 339 times [2021-03-10 21:26:33,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:33,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377272518] [2021-03-10 21:26:33,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:33,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:33,848 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:33,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377272518] [2021-03-10 21:26:33,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384432360] [2021-03-10 21:26:33,849 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:33,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:26:33,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:33,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:26:33,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:33,915 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 23 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:33,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:33,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:26:33,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386193045] [2021-03-10 21:26:33,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:26:33,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:33,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:26:33,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:26:33,916 INFO L87 Difference]: Start difference. First operand 17755 states and 52576 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:34,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:34,124 INFO L93 Difference]: Finished difference Result 18122 states and 53190 transitions. [2021-03-10 21:26:34,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:26:34,125 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:34,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:34,153 INFO L225 Difference]: With dead ends: 18122 [2021-03-10 21:26:34,153 INFO L226 Difference]: Without dead ends: 18113 [2021-03-10 21:26:34,154 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 135.7ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:26:34,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18113 states. [2021-03-10 21:26:34,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18113 to 17738. [2021-03-10 21:26:34,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17738 states, 17737 states have (on average 2.960139820713762) internal successors, (52504), 17737 states have internal predecessors, (52504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:34,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17738 states to 17738 states and 52504 transitions. [2021-03-10 21:26:34,397 INFO L78 Accepts]: Start accepts. Automaton has 17738 states and 52504 transitions. Word has length 23 [2021-03-10 21:26:34,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:34,397 INFO L480 AbstractCegarLoop]: Abstraction has 17738 states and 52504 transitions. [2021-03-10 21:26:34,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:34,397 INFO L276 IsEmpty]: Start isEmpty. Operand 17738 states and 52504 transitions. [2021-03-10 21:26:34,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:34,410 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:34,410 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:34,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3348,341 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:34,611 INFO L428 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:34,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:34,611 INFO L82 PathProgramCache]: Analyzing trace with hash -188074740, now seen corresponding path program 340 times [2021-03-10 21:26:34,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:34,611 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866706543] [2021-03-10 21:26:34,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:34,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:34,694 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:34,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866706543] [2021-03-10 21:26:34,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817594517] [2021-03-10 21:26:34,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:34,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:34,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:34,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:34,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:34,766 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:34,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:34,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-03-10 21:26:34,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711621763] [2021-03-10 21:26:34,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:26:34,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:34,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:26:34,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:34,766 INFO L87 Difference]: Start difference. First operand 17738 states and 52504 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:34,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:34,989 INFO L93 Difference]: Finished difference Result 18117 states and 53136 transitions. [2021-03-10 21:26:34,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:26:34,990 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:34,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:35,012 INFO L225 Difference]: With dead ends: 18117 [2021-03-10 21:26:35,012 INFO L226 Difference]: Without dead ends: 18109 [2021-03-10 21:26:35,013 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 153.5ms TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:26:35,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18109 states. [2021-03-10 21:26:35,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18109 to 17756. [2021-03-10 21:26:35,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17756 states, 17755 states have (on average 2.9588848211771333) internal successors, (52535), 17755 states have internal predecessors, (52535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:35,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17756 states to 17756 states and 52535 transitions. [2021-03-10 21:26:35,259 INFO L78 Accepts]: Start accepts. Automaton has 17756 states and 52535 transitions. Word has length 23 [2021-03-10 21:26:35,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:35,259 INFO L480 AbstractCegarLoop]: Abstraction has 17756 states and 52535 transitions. [2021-03-10 21:26:35,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:35,259 INFO L276 IsEmpty]: Start isEmpty. Operand 17756 states and 52535 transitions. [2021-03-10 21:26:35,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:35,273 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:35,273 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:35,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3349,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:35,473 INFO L428 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:35,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:35,473 INFO L82 PathProgramCache]: Analyzing trace with hash -630973880, now seen corresponding path program 341 times [2021-03-10 21:26:35,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:35,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117254042] [2021-03-10 21:26:35,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:35,559 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:35,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117254042] [2021-03-10 21:26:35,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692346677] [2021-03-10 21:26:35,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:35,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:26:35,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:35,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:35,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:35,623 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:26:35,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:35,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 15 [2021-03-10 21:26:35,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299187950] [2021-03-10 21:26:35,623 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:26:35,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:35,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:26:35,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:35,623 INFO L87 Difference]: Start difference. First operand 17756 states and 52535 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:35,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:35,876 INFO L93 Difference]: Finished difference Result 19811 states and 57453 transitions. [2021-03-10 21:26:35,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:26:35,876 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:35,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:35,902 INFO L225 Difference]: With dead ends: 19811 [2021-03-10 21:26:35,903 INFO L226 Difference]: Without dead ends: 19801 [2021-03-10 21:26:35,903 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 178.9ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:26:35,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19801 states. [2021-03-10 21:26:36,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19801 to 17805. [2021-03-10 21:26:36,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17805 states, 17804 states have (on average 2.9582116378341947) internal successors, (52668), 17804 states have internal predecessors, (52668), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:36,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17805 states to 17805 states and 52668 transitions. [2021-03-10 21:26:36,145 INFO L78 Accepts]: Start accepts. Automaton has 17805 states and 52668 transitions. Word has length 23 [2021-03-10 21:26:36,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:36,145 INFO L480 AbstractCegarLoop]: Abstraction has 17805 states and 52668 transitions. [2021-03-10 21:26:36,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:36,145 INFO L276 IsEmpty]: Start isEmpty. Operand 17805 states and 52668 transitions. [2021-03-10 21:26:36,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:36,158 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:36,158 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:36,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3350 [2021-03-10 21:26:36,358 INFO L428 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:36,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:36,358 INFO L82 PathProgramCache]: Analyzing trace with hash -1475945332, now seen corresponding path program 342 times [2021-03-10 21:26:36,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:36,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617103332] [2021-03-10 21:26:36,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:36,454 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:36,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617103332] [2021-03-10 21:26:36,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635168115] [2021-03-10 21:26:36,454 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:36,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:26:36,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:36,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:26:36,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:36,520 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:36,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:36,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-03-10 21:26:36,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003336894] [2021-03-10 21:26:36,520 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:26:36,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:36,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:26:36,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:36,521 INFO L87 Difference]: Start difference. First operand 17805 states and 52668 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:36,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:36,826 INFO L93 Difference]: Finished difference Result 19831 states and 57467 transitions. [2021-03-10 21:26:36,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:26:36,827 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:36,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:36,852 INFO L225 Difference]: With dead ends: 19831 [2021-03-10 21:26:36,852 INFO L226 Difference]: Without dead ends: 19819 [2021-03-10 21:26:36,853 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 201.0ms TimeCoverageRelationStatistics Valid=298, Invalid=632, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:26:36,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19819 states. [2021-03-10 21:26:37,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19819 to 17849. [2021-03-10 21:26:37,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17849 states, 17848 states have (on average 2.9575302554908114) internal successors, (52786), 17848 states have internal predecessors, (52786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:37,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17849 states to 17849 states and 52786 transitions. [2021-03-10 21:26:37,100 INFO L78 Accepts]: Start accepts. Automaton has 17849 states and 52786 transitions. Word has length 23 [2021-03-10 21:26:37,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:37,101 INFO L480 AbstractCegarLoop]: Abstraction has 17849 states and 52786 transitions. [2021-03-10 21:26:37,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:37,101 INFO L276 IsEmpty]: Start isEmpty. Operand 17849 states and 52786 transitions. [2021-03-10 21:26:37,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:37,114 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:37,114 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:37,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3351,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:37,315 INFO L428 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:37,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:37,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1900256568, now seen corresponding path program 343 times [2021-03-10 21:26:37,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:37,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241358198] [2021-03-10 21:26:37,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:37,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:37,416 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:37,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241358198] [2021-03-10 21:26:37,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215851555] [2021-03-10 21:26:37,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:37,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:37,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:37,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:37,508 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:37,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:37,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 16 [2021-03-10 21:26:37,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001889686] [2021-03-10 21:26:37,509 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:26:37,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:37,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:26:37,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:37,509 INFO L87 Difference]: Start difference. First operand 17849 states and 52786 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:37,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:37,829 INFO L93 Difference]: Finished difference Result 19267 states and 56030 transitions. [2021-03-10 21:26:37,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:26:37,829 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:37,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:37,856 INFO L225 Difference]: With dead ends: 19267 [2021-03-10 21:26:37,857 INFO L226 Difference]: Without dead ends: 19253 [2021-03-10 21:26:37,857 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 256.6ms TimeCoverageRelationStatistics Valid=385, Invalid=805, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:26:37,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19253 states. [2021-03-10 21:26:38,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19253 to 17849. [2021-03-10 21:26:38,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17849 states, 17848 states have (on average 2.9572501120573733) internal successors, (52781), 17848 states have internal predecessors, (52781), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:38,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17849 states to 17849 states and 52781 transitions. [2021-03-10 21:26:38,102 INFO L78 Accepts]: Start accepts. Automaton has 17849 states and 52781 transitions. Word has length 23 [2021-03-10 21:26:38,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:38,103 INFO L480 AbstractCegarLoop]: Abstraction has 17849 states and 52781 transitions. [2021-03-10 21:26:38,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:38,103 INFO L276 IsEmpty]: Start isEmpty. Operand 17849 states and 52781 transitions. [2021-03-10 21:26:38,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:38,117 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:38,117 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:38,318 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3352 [2021-03-10 21:26:38,318 INFO L428 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:38,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:38,318 INFO L82 PathProgramCache]: Analyzing trace with hash -2144238716, now seen corresponding path program 344 times [2021-03-10 21:26:38,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:38,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653671307] [2021-03-10 21:26:38,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:38,389 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:38,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653671307] [2021-03-10 21:26:38,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134608704] [2021-03-10 21:26:38,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:38,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:38,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:38,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:26:38,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:38,459 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 41 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:38,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:38,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:26:38,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771623426] [2021-03-10 21:26:38,459 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:26:38,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:38,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:26:38,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:26:38,460 INFO L87 Difference]: Start difference. First operand 17849 states and 52781 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:38,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:38,624 INFO L93 Difference]: Finished difference Result 18130 states and 53192 transitions. [2021-03-10 21:26:38,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:26:38,624 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:38,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:38,647 INFO L225 Difference]: With dead ends: 18130 [2021-03-10 21:26:38,647 INFO L226 Difference]: Without dead ends: 18126 [2021-03-10 21:26:38,647 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 110.1ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:26:38,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18126 states. [2021-03-10 21:26:38,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18126 to 17787. [2021-03-10 21:26:38,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17787 states, 17786 states have (on average 2.9562015068031036) internal successors, (52579), 17786 states have internal predecessors, (52579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:38,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17787 states to 17787 states and 52579 transitions. [2021-03-10 21:26:38,894 INFO L78 Accepts]: Start accepts. Automaton has 17787 states and 52579 transitions. Word has length 23 [2021-03-10 21:26:38,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:38,894 INFO L480 AbstractCegarLoop]: Abstraction has 17787 states and 52579 transitions. [2021-03-10 21:26:38,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:38,894 INFO L276 IsEmpty]: Start isEmpty. Operand 17787 states and 52579 transitions. [2021-03-10 21:26:38,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:38,908 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:38,908 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:39,108 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3353 [2021-03-10 21:26:39,108 INFO L428 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:39,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:39,109 INFO L82 PathProgramCache]: Analyzing trace with hash 907814562, now seen corresponding path program 345 times [2021-03-10 21:26:39,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:39,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992559301] [2021-03-10 21:26:39,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:39,195 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:39,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992559301] [2021-03-10 21:26:39,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237937408] [2021-03-10 21:26:39,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:39,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:26:39,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:39,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:26:39,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:39,267 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:39,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:39,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:26:39,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876546080] [2021-03-10 21:26:39,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:26:39,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:39,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:26:39,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:39,268 INFO L87 Difference]: Start difference. First operand 17787 states and 52579 transitions. Second operand has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:39,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:39,506 INFO L93 Difference]: Finished difference Result 18203 states and 53300 transitions. [2021-03-10 21:26:39,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:26:39,507 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:39,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:39,530 INFO L225 Difference]: With dead ends: 18203 [2021-03-10 21:26:39,530 INFO L226 Difference]: Without dead ends: 18188 [2021-03-10 21:26:39,530 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 176.8ms TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:26:39,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18188 states. [2021-03-10 21:26:39,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18188 to 17734. [2021-03-10 21:26:39,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17734 states, 17733 states have (on average 2.9543224496701064) internal successors, (52389), 17733 states have internal predecessors, (52389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:39,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17734 states to 17734 states and 52389 transitions. [2021-03-10 21:26:39,767 INFO L78 Accepts]: Start accepts. Automaton has 17734 states and 52389 transitions. Word has length 23 [2021-03-10 21:26:39,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:39,767 INFO L480 AbstractCegarLoop]: Abstraction has 17734 states and 52389 transitions. [2021-03-10 21:26:39,767 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:39,767 INFO L276 IsEmpty]: Start isEmpty. Operand 17734 states and 52389 transitions. [2021-03-10 21:26:39,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:39,781 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:39,781 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:39,981 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3354,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:39,981 INFO L428 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:39,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:39,981 INFO L82 PathProgramCache]: Analyzing trace with hash 62843110, now seen corresponding path program 346 times [2021-03-10 21:26:39,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:39,981 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279872089] [2021-03-10 21:26:39,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:39,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:40,077 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:40,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279872089] [2021-03-10 21:26:40,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779735252] [2021-03-10 21:26:40,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:40,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:40,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:40,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:40,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:40,145 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 33 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:40,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:40,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-03-10 21:26:40,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087888898] [2021-03-10 21:26:40,145 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:26:40,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:40,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:26:40,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:26:40,146 INFO L87 Difference]: Start difference. First operand 17734 states and 52389 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:40,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:40,399 INFO L93 Difference]: Finished difference Result 18155 states and 53119 transitions. [2021-03-10 21:26:40,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:26:40,399 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:40,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:40,421 INFO L225 Difference]: With dead ends: 18155 [2021-03-10 21:26:40,421 INFO L226 Difference]: Without dead ends: 18143 [2021-03-10 21:26:40,421 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 195.5ms TimeCoverageRelationStatistics Valid=297, Invalid=633, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:26:40,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18143 states. [2021-03-10 21:26:40,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18143 to 17705. [2021-03-10 21:26:40,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17705 states, 17704 states have (on average 2.9526660641662903) internal successors, (52274), 17704 states have internal predecessors, (52274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:40,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17705 states to 17705 states and 52274 transitions. [2021-03-10 21:26:40,705 INFO L78 Accepts]: Start accepts. Automaton has 17705 states and 52274 transitions. Word has length 23 [2021-03-10 21:26:40,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:40,705 INFO L480 AbstractCegarLoop]: Abstraction has 17705 states and 52274 transitions. [2021-03-10 21:26:40,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:40,705 INFO L276 IsEmpty]: Start isEmpty. Operand 17705 states and 52274 transitions. [2021-03-10 21:26:40,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:40,718 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:40,718 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:40,919 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3355,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:40,919 INFO L428 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:40,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:40,919 INFO L82 PathProgramCache]: Analyzing trace with hash -361468126, now seen corresponding path program 347 times [2021-03-10 21:26:40,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:40,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052330886] [2021-03-10 21:26:40,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:40,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:41,020 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:41,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052330886] [2021-03-10 21:26:41,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33121788] [2021-03-10 21:26:41,020 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:41,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:26:41,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:41,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:26:41,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:41,092 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:41,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:41,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-03-10 21:26:41,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121692174] [2021-03-10 21:26:41,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:26:41,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:41,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:26:41,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:26:41,093 INFO L87 Difference]: Start difference. First operand 17705 states and 52274 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:41,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:41,407 INFO L93 Difference]: Finished difference Result 18640 states and 54430 transitions. [2021-03-10 21:26:41,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:26:41,408 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:41,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:41,432 INFO L225 Difference]: With dead ends: 18640 [2021-03-10 21:26:41,432 INFO L226 Difference]: Without dead ends: 18626 [2021-03-10 21:26:41,432 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 250.6ms TimeCoverageRelationStatistics Valid=378, Invalid=812, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:26:41,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18626 states. [2021-03-10 21:26:41,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18626 to 17706. [2021-03-10 21:26:41,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17706 states, 17705 states have (on average 2.952216887884778) internal successors, (52269), 17705 states have internal predecessors, (52269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:41,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17706 states to 17706 states and 52269 transitions. [2021-03-10 21:26:41,681 INFO L78 Accepts]: Start accepts. Automaton has 17706 states and 52269 transitions. Word has length 23 [2021-03-10 21:26:41,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:41,681 INFO L480 AbstractCegarLoop]: Abstraction has 17706 states and 52269 transitions. [2021-03-10 21:26:41,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:41,681 INFO L276 IsEmpty]: Start isEmpty. Operand 17706 states and 52269 transitions. [2021-03-10 21:26:41,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:41,695 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:41,695 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:41,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3356,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:41,895 INFO L428 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:41,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:41,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1602127322, now seen corresponding path program 348 times [2021-03-10 21:26:41,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:41,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397746678] [2021-03-10 21:26:41,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:41,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:41,974 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:41,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397746678] [2021-03-10 21:26:41,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432676771] [2021-03-10 21:26:41,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:41,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:26:41,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:41,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:26:41,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:42,045 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:42,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:42,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:26:42,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33451550] [2021-03-10 21:26:42,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:42,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:42,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:42,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:42,046 INFO L87 Difference]: Start difference. First operand 17706 states and 52269 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:42,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:42,177 INFO L93 Difference]: Finished difference Result 18069 states and 52830 transitions. [2021-03-10 21:26:42,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:26:42,178 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:42,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:42,199 INFO L225 Difference]: With dead ends: 18069 [2021-03-10 21:26:42,199 INFO L226 Difference]: Without dead ends: 18069 [2021-03-10 21:26:42,199 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:26:42,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18069 states. [2021-03-10 21:26:42,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18069 to 17709. [2021-03-10 21:26:42,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17709 states, 17708 states have (on average 2.9522249830585046) internal successors, (52278), 17708 states have internal predecessors, (52278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:42,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17709 states to 17709 states and 52278 transitions. [2021-03-10 21:26:42,447 INFO L78 Accepts]: Start accepts. Automaton has 17709 states and 52278 transitions. Word has length 23 [2021-03-10 21:26:42,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:42,447 INFO L480 AbstractCegarLoop]: Abstraction has 17709 states and 52278 transitions. [2021-03-10 21:26:42,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 13 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:42,447 INFO L276 IsEmpty]: Start isEmpty. Operand 17709 states and 52278 transitions. [2021-03-10 21:26:42,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:42,461 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:42,461 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:42,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3357 [2021-03-10 21:26:42,661 INFO L428 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:42,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:42,661 INFO L82 PathProgramCache]: Analyzing trace with hash 935096200, now seen corresponding path program 349 times [2021-03-10 21:26:42,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:42,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615123235] [2021-03-10 21:26:42,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:42,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:42,764 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:42,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615123235] [2021-03-10 21:26:42,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275714761] [2021-03-10 21:26:42,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:42,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:42,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:42,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:42,836 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:42,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:42,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-03-10 21:26:42,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177641819] [2021-03-10 21:26:42,836 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:26:42,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:42,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:26:42,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:26:42,837 INFO L87 Difference]: Start difference. First operand 17709 states and 52278 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:43,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:43,115 INFO L93 Difference]: Finished difference Result 19393 states and 56292 transitions. [2021-03-10 21:26:43,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:26:43,116 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:43,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:43,139 INFO L225 Difference]: With dead ends: 19393 [2021-03-10 21:26:43,139 INFO L226 Difference]: Without dead ends: 19379 [2021-03-10 21:26:43,140 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 219.2ms TimeCoverageRelationStatistics Valid=318, Invalid=674, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:26:43,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19379 states. [2021-03-10 21:26:43,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19379 to 17740. [2021-03-10 21:26:43,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17740 states, 17739 states have (on average 2.9508991487682508) internal successors, (52346), 17739 states have internal predecessors, (52346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:43,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17740 states to 17740 states and 52346 transitions. [2021-03-10 21:26:43,384 INFO L78 Accepts]: Start accepts. Automaton has 17740 states and 52346 transitions. Word has length 23 [2021-03-10 21:26:43,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:43,385 INFO L480 AbstractCegarLoop]: Abstraction has 17740 states and 52346 transitions. [2021-03-10 21:26:43,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:43,385 INFO L276 IsEmpty]: Start isEmpty. Operand 17740 states and 52346 transitions. [2021-03-10 21:26:43,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:43,398 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:43,398 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:43,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3358,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:43,598 INFO L428 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:43,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:43,598 INFO L82 PathProgramCache]: Analyzing trace with hash 216475460, now seen corresponding path program 350 times [2021-03-10 21:26:43,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:43,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132850531] [2021-03-10 21:26:43,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:43,658 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:43,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132850531] [2021-03-10 21:26:43,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042872478] [2021-03-10 21:26:43,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:43,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:43,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:43,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:43,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:43,727 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:26:43,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:43,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-03-10 21:26:43,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865399573] [2021-03-10 21:26:43,727 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:43,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:43,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:43,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:43,728 INFO L87 Difference]: Start difference. First operand 17740 states and 52346 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:43,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:43,843 INFO L93 Difference]: Finished difference Result 18165 states and 52994 transitions. [2021-03-10 21:26:43,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:26:43,843 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:43,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:43,865 INFO L225 Difference]: With dead ends: 18165 [2021-03-10 21:26:43,865 INFO L226 Difference]: Without dead ends: 18165 [2021-03-10 21:26:43,866 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 65.6ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:43,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18165 states. [2021-03-10 21:26:44,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18165 to 17749. [2021-03-10 21:26:44,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17749 states, 17748 states have (on average 2.9512621140410187) internal successors, (52379), 17748 states have internal predecessors, (52379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:44,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17749 states to 17749 states and 52379 transitions. [2021-03-10 21:26:44,147 INFO L78 Accepts]: Start accepts. Automaton has 17749 states and 52379 transitions. Word has length 23 [2021-03-10 21:26:44,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:44,147 INFO L480 AbstractCegarLoop]: Abstraction has 17749 states and 52379 transitions. [2021-03-10 21:26:44,147 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:44,147 INFO L276 IsEmpty]: Start isEmpty. Operand 17749 states and 52379 transitions. [2021-03-10 21:26:44,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:44,160 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:44,161 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:44,361 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3359,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:44,361 INFO L428 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:44,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:44,361 INFO L82 PathProgramCache]: Analyzing trace with hash -622423838, now seen corresponding path program 351 times [2021-03-10 21:26:44,362 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:44,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766073090] [2021-03-10 21:26:44,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:44,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:44,427 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 35 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:44,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766073090] [2021-03-10 21:26:44,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853678836] [2021-03-10 21:26:44,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:44,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:26:44,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:44,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:26:44,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:44,492 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 35 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:44,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:44,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:26:44,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048806311] [2021-03-10 21:26:44,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:26:44,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:44,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:26:44,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:26:44,493 INFO L87 Difference]: Start difference. First operand 17749 states and 52379 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:44,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:44,687 INFO L93 Difference]: Finished difference Result 18087 states and 52839 transitions. [2021-03-10 21:26:44,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:26:44,688 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:44,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:44,713 INFO L225 Difference]: With dead ends: 18087 [2021-03-10 21:26:44,713 INFO L226 Difference]: Without dead ends: 18085 [2021-03-10 21:26:44,713 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 121.8ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:26:44,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18085 states. [2021-03-10 21:26:44,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18085 to 17749. [2021-03-10 21:26:44,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17749 states, 17748 states have (on average 2.9509240477800316) internal successors, (52373), 17748 states have internal predecessors, (52373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:44,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17749 states to 17749 states and 52373 transitions. [2021-03-10 21:26:44,964 INFO L78 Accepts]: Start accepts. Automaton has 17749 states and 52373 transitions. Word has length 23 [2021-03-10 21:26:44,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:44,964 INFO L480 AbstractCegarLoop]: Abstraction has 17749 states and 52373 transitions. [2021-03-10 21:26:44,964 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:44,964 INFO L276 IsEmpty]: Start isEmpty. Operand 17749 states and 52373 transitions. [2021-03-10 21:26:44,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:44,977 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:44,977 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:45,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3360 [2021-03-10 21:26:45,178 INFO L428 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:45,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:45,178 INFO L82 PathProgramCache]: Analyzing trace with hash 866981158, now seen corresponding path program 352 times [2021-03-10 21:26:45,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:45,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824551228] [2021-03-10 21:26:45,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:45,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:45,246 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 30 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:45,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824551228] [2021-03-10 21:26:45,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103776561] [2021-03-10 21:26:45,246 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:45,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:45,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:45,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:45,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:45,314 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:26:45,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:45,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-03-10 21:26:45,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701909513] [2021-03-10 21:26:45,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:26:45,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:45,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:26:45,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:26:45,314 INFO L87 Difference]: Start difference. First operand 17749 states and 52373 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:45,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:45,529 INFO L93 Difference]: Finished difference Result 18093 states and 52841 transitions. [2021-03-10 21:26:45,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:26:45,530 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:45,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:45,552 INFO L225 Difference]: With dead ends: 18093 [2021-03-10 21:26:45,553 INFO L226 Difference]: Without dead ends: 18089 [2021-03-10 21:26:45,553 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:26:45,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18089 states. [2021-03-10 21:26:45,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18089 to 17749. [2021-03-10 21:26:45,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17749 states, 17748 states have (on average 2.94990984899707) internal successors, (52355), 17748 states have internal predecessors, (52355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:45,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17749 states to 17749 states and 52355 transitions. [2021-03-10 21:26:45,815 INFO L78 Accepts]: Start accepts. Automaton has 17749 states and 52355 transitions. Word has length 23 [2021-03-10 21:26:45,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:45,815 INFO L480 AbstractCegarLoop]: Abstraction has 17749 states and 52355 transitions. [2021-03-10 21:26:45,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:45,815 INFO L276 IsEmpty]: Start isEmpty. Operand 17749 states and 52355 transitions. [2021-03-10 21:26:45,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:45,829 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:45,829 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:46,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3361,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:46,029 INFO L428 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:46,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:46,029 INFO L82 PathProgramCache]: Analyzing trace with hash -206104222, now seen corresponding path program 353 times [2021-03-10 21:26:46,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:46,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756720067] [2021-03-10 21:26:46,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:46,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:46,104 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:46,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756720067] [2021-03-10 21:26:46,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204482209] [2021-03-10 21:26:46,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:46,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:26:46,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:46,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:46,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:46,174 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 33 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:46,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:46,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-03-10 21:26:46,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15032096] [2021-03-10 21:26:46,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:26:46,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:46,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:26:46,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:46,175 INFO L87 Difference]: Start difference. First operand 17749 states and 52355 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:46,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:46,410 INFO L93 Difference]: Finished difference Result 18102 states and 52836 transitions. [2021-03-10 21:26:46,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:26:46,411 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:46,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:46,434 INFO L225 Difference]: With dead ends: 18102 [2021-03-10 21:26:46,434 INFO L226 Difference]: Without dead ends: 18096 [2021-03-10 21:26:46,434 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 152.2ms TimeCoverageRelationStatistics Valid=233, Invalid=469, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:26:46,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18096 states. [2021-03-10 21:26:46,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18096 to 17749. [2021-03-10 21:26:46,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17749 states, 17748 states have (on average 2.948388550822628) internal successors, (52328), 17748 states have internal predecessors, (52328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:46,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17749 states to 17749 states and 52328 transitions. [2021-03-10 21:26:46,683 INFO L78 Accepts]: Start accepts. Automaton has 17749 states and 52328 transitions. Word has length 23 [2021-03-10 21:26:46,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:46,683 INFO L480 AbstractCegarLoop]: Abstraction has 17749 states and 52328 transitions. [2021-03-10 21:26:46,683 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:46,683 INFO L276 IsEmpty]: Start isEmpty. Operand 17749 states and 52328 transitions. [2021-03-10 21:26:46,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:46,698 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:46,698 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:46,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3362 [2021-03-10 21:26:46,899 INFO L428 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:46,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:46,899 INFO L82 PathProgramCache]: Analyzing trace with hash 887987366, now seen corresponding path program 354 times [2021-03-10 21:26:46,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:46,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980416707] [2021-03-10 21:26:46,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:46,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:46,978 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:46,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980416707] [2021-03-10 21:26:46,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104424256] [2021-03-10 21:26:46,978 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:46,998 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:26:46,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:46,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:26:46,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:47,048 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:47,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:47,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:26:47,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908860466] [2021-03-10 21:26:47,049 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:26:47,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:47,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:26:47,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:26:47,049 INFO L87 Difference]: Start difference. First operand 17749 states and 52328 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:47,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:47,293 INFO L93 Difference]: Finished difference Result 20612 states and 59720 transitions. [2021-03-10 21:26:47,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:26:47,293 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:47,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:47,319 INFO L225 Difference]: With dead ends: 20612 [2021-03-10 21:26:47,319 INFO L226 Difference]: Without dead ends: 20604 [2021-03-10 21:26:47,319 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 168.3ms TimeCoverageRelationStatistics Valid=245, Invalid=511, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:26:47,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20604 states. [2021-03-10 21:26:47,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20604 to 17773. [2021-03-10 21:26:47,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17773 states, 17772 states have (on average 2.9481769074949358) internal successors, (52395), 17772 states have internal predecessors, (52395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:47,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17773 states to 17773 states and 52395 transitions. [2021-03-10 21:26:47,674 INFO L78 Accepts]: Start accepts. Automaton has 17773 states and 52395 transitions. Word has length 23 [2021-03-10 21:26:47,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:47,675 INFO L480 AbstractCegarLoop]: Abstraction has 17773 states and 52395 transitions. [2021-03-10 21:26:47,675 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:47,675 INFO L276 IsEmpty]: Start isEmpty. Operand 17773 states and 52395 transitions. [2021-03-10 21:26:47,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:47,687 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:47,687 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:47,887 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 356 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3363 [2021-03-10 21:26:47,887 INFO L428 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:47,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:47,887 INFO L82 PathProgramCache]: Analyzing trace with hash 445088226, now seen corresponding path program 355 times [2021-03-10 21:26:47,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:47,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104786204] [2021-03-10 21:26:47,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:47,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:47,974 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:47,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104786204] [2021-03-10 21:26:47,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571614292] [2021-03-10 21:26:47,974 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:47,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:47,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:48,042 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:48,042 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:48,042 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-03-10 21:26:48,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446004493] [2021-03-10 21:26:48,042 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:26:48,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:48,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:26:48,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:48,042 INFO L87 Difference]: Start difference. First operand 17773 states and 52395 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:48,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:48,299 INFO L93 Difference]: Finished difference Result 20639 states and 59747 transitions. [2021-03-10 21:26:48,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:26:48,299 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:48,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:48,326 INFO L225 Difference]: With dead ends: 20639 [2021-03-10 21:26:48,326 INFO L226 Difference]: Without dead ends: 20629 [2021-03-10 21:26:48,327 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 185.7ms TimeCoverageRelationStatistics Valid=280, Invalid=590, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:26:48,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20629 states. [2021-03-10 21:26:48,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20629 to 17895. [2021-03-10 21:26:48,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17895 states, 17894 states have (on average 2.948418464289706) internal successors, (52759), 17894 states have internal predecessors, (52759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:48,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17895 states to 17895 states and 52759 transitions. [2021-03-10 21:26:48,586 INFO L78 Accepts]: Start accepts. Automaton has 17895 states and 52759 transitions. Word has length 23 [2021-03-10 21:26:48,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:48,586 INFO L480 AbstractCegarLoop]: Abstraction has 17895 states and 52759 transitions. [2021-03-10 21:26:48,586 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:48,586 INFO L276 IsEmpty]: Start isEmpty. Operand 17895 states and 52759 transitions. [2021-03-10 21:26:48,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:48,600 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:48,600 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:48,801 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3364 [2021-03-10 21:26:48,801 INFO L428 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:48,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:48,801 INFO L82 PathProgramCache]: Analyzing trace with hash -399883226, now seen corresponding path program 356 times [2021-03-10 21:26:48,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:48,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113424368] [2021-03-10 21:26:48,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:48,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:48,894 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:48,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113424368] [2021-03-10 21:26:48,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668419458] [2021-03-10 21:26:48,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:48,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:48,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:48,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:48,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:48,965 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:26:48,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:48,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 16 [2021-03-10 21:26:48,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799995099] [2021-03-10 21:26:48,965 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:26:48,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:48,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:26:48,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:48,965 INFO L87 Difference]: Start difference. First operand 17895 states and 52759 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:49,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:49,274 INFO L93 Difference]: Finished difference Result 20525 states and 59344 transitions. [2021-03-10 21:26:49,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:26:49,275 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:49,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:49,301 INFO L225 Difference]: With dead ends: 20525 [2021-03-10 21:26:49,301 INFO L226 Difference]: Without dead ends: 20513 [2021-03-10 21:26:49,301 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:26:49,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20513 states. [2021-03-10 21:26:49,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20513 to 17903. [2021-03-10 21:26:49,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17903 states, 17902 states have (on average 2.948218076192604) internal successors, (52779), 17902 states have internal predecessors, (52779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:49,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17903 states to 17903 states and 52779 transitions. [2021-03-10 21:26:49,559 INFO L78 Accepts]: Start accepts. Automaton has 17903 states and 52779 transitions. Word has length 23 [2021-03-10 21:26:49,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:49,559 INFO L480 AbstractCegarLoop]: Abstraction has 17903 states and 52779 transitions. [2021-03-10 21:26:49,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:49,559 INFO L276 IsEmpty]: Start isEmpty. Operand 17903 states and 52779 transitions. [2021-03-10 21:26:49,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:49,573 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:49,573 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:49,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3365,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:49,774 INFO L428 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:49,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:49,774 INFO L82 PathProgramCache]: Analyzing trace with hash -824194462, now seen corresponding path program 357 times [2021-03-10 21:26:49,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:49,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766160906] [2021-03-10 21:26:49,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:49,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:49,879 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:49,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766160906] [2021-03-10 21:26:49,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355687703] [2021-03-10 21:26:49,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:49,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:26:49,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:49,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:26:49,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:49,952 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:49,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:49,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-03-10 21:26:49,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546496184] [2021-03-10 21:26:49,953 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:26:49,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:49,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:26:49,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:26:49,953 INFO L87 Difference]: Start difference. First operand 17903 states and 52779 transitions. Second operand has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:50,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:50,286 INFO L93 Difference]: Finished difference Result 20558 states and 59379 transitions. [2021-03-10 21:26:50,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:26:50,287 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:50,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:50,313 INFO L225 Difference]: With dead ends: 20558 [2021-03-10 21:26:50,313 INFO L226 Difference]: Without dead ends: 20544 [2021-03-10 21:26:50,313 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 250.9ms TimeCoverageRelationStatistics Valid=384, Invalid=806, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:26:50,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20544 states. [2021-03-10 21:26:50,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20544 to 17922. [2021-03-10 21:26:50,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17922 states, 17921 states have (on average 2.9477707717203283) internal successors, (52827), 17921 states have internal predecessors, (52827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:50,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17922 states to 17922 states and 52827 transitions. [2021-03-10 21:26:50,581 INFO L78 Accepts]: Start accepts. Automaton has 17922 states and 52827 transitions. Word has length 23 [2021-03-10 21:26:50,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:50,581 INFO L480 AbstractCegarLoop]: Abstraction has 17922 states and 52827 transitions. [2021-03-10 21:26:50,581 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 17 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:50,581 INFO L276 IsEmpty]: Start isEmpty. Operand 17922 states and 52827 transitions. [2021-03-10 21:26:50,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:50,596 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:50,596 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:50,797 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3366,359 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:50,797 INFO L428 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:50,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:50,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1092940890, now seen corresponding path program 358 times [2021-03-10 21:26:50,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:50,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791418962] [2021-03-10 21:26:50,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:50,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:50,908 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:50,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791418962] [2021-03-10 21:26:50,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654464802] [2021-03-10 21:26:50,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:50,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:50,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:50,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:50,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:50,980 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:50,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:50,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 17 [2021-03-10 21:26:50,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984991392] [2021-03-10 21:26:50,980 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:26:50,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:50,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:26:50,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:26:50,981 INFO L87 Difference]: Start difference. First operand 17922 states and 52827 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:51,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:51,407 INFO L93 Difference]: Finished difference Result 19475 states and 56422 transitions. [2021-03-10 21:26:51,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:26:51,408 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:51,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:51,431 INFO L225 Difference]: With dead ends: 19475 [2021-03-10 21:26:51,431 INFO L226 Difference]: Without dead ends: 19459 [2021-03-10 21:26:51,432 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 328.2ms TimeCoverageRelationStatistics Valid=511, Invalid=1049, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:26:51,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19459 states. [2021-03-10 21:26:51,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19459 to 17924. [2021-03-10 21:26:51,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17924 states, 17923 states have (on average 2.9474418345143114) internal successors, (52827), 17923 states have internal predecessors, (52827), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:51,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17924 states to 17924 states and 52827 transitions. [2021-03-10 21:26:51,737 INFO L78 Accepts]: Start accepts. Automaton has 17924 states and 52827 transitions. Word has length 23 [2021-03-10 21:26:51,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:51,737 INFO L480 AbstractCegarLoop]: Abstraction has 17924 states and 52827 transitions. [2021-03-10 21:26:51,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:51,738 INFO L276 IsEmpty]: Start isEmpty. Operand 17924 states and 52827 transitions. [2021-03-10 21:26:51,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:51,751 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:51,751 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:51,952 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3367,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:51,952 INFO L428 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:51,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:51,952 INFO L82 PathProgramCache]: Analyzing trace with hash -416621138, now seen corresponding path program 359 times [2021-03-10 21:26:51,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:51,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [938636160] [2021-03-10 21:26:51,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:51,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:52,059 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:52,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [938636160] [2021-03-10 21:26:52,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613507195] [2021-03-10 21:26:52,059 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:52,083 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:26:52,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:52,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:52,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:52,174 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:52,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:52,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 21 [2021-03-10 21:26:52,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280859527] [2021-03-10 21:26:52,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:26:52,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:52,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:26:52,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=343, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:26:52,175 INFO L87 Difference]: Start difference. First operand 17924 states and 52827 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:52,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:52,418 INFO L93 Difference]: Finished difference Result 18184 states and 53240 transitions. [2021-03-10 21:26:52,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:26:52,419 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:52,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:52,441 INFO L225 Difference]: With dead ends: 18184 [2021-03-10 21:26:52,441 INFO L226 Difference]: Without dead ends: 18178 [2021-03-10 21:26:52,441 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 226.6ms TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:26:52,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18178 states. [2021-03-10 21:26:52,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18178 to 17931. [2021-03-10 21:26:52,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17931 states, 17930 states have (on average 2.946793084216397) internal successors, (52836), 17930 states have internal predecessors, (52836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:52,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17931 states to 17931 states and 52836 transitions. [2021-03-10 21:26:52,686 INFO L78 Accepts]: Start accepts. Automaton has 17931 states and 52836 transitions. Word has length 23 [2021-03-10 21:26:52,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:52,686 INFO L480 AbstractCegarLoop]: Abstraction has 17931 states and 52836 transitions. [2021-03-10 21:26:52,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:52,686 INFO L276 IsEmpty]: Start isEmpty. Operand 17931 states and 52836 transitions. [2021-03-10 21:26:52,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:52,700 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:52,700 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:52,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3368,361 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:52,900 INFO L428 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:52,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:52,901 INFO L82 PathProgramCache]: Analyzing trace with hash -2006669488, now seen corresponding path program 360 times [2021-03-10 21:26:52,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:52,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988393658] [2021-03-10 21:26:52,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:53,004 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:53,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988393658] [2021-03-10 21:26:53,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297710662] [2021-03-10 21:26:53,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:53,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:26:53,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:53,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:26:53,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:53,085 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:53,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:53,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-03-10 21:26:53,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231657193] [2021-03-10 21:26:53,086 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:26:53,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:53,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:26:53,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:26:53,086 INFO L87 Difference]: Start difference. First operand 17931 states and 52836 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:53,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:53,356 INFO L93 Difference]: Finished difference Result 18330 states and 53673 transitions. [2021-03-10 21:26:53,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:26:53,357 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:53,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:53,380 INFO L225 Difference]: With dead ends: 18330 [2021-03-10 21:26:53,380 INFO L226 Difference]: Without dead ends: 18316 [2021-03-10 21:26:53,380 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 221.4ms TimeCoverageRelationStatistics Valid=305, Invalid=687, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:26:53,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18316 states. [2021-03-10 21:26:53,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18316 to 17927. [2021-03-10 21:26:53,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17927 states, 17926 states have (on average 2.9460560080330245) internal successors, (52811), 17926 states have internal predecessors, (52811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:53,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17927 states to 17927 states and 52811 transitions. [2021-03-10 21:26:53,635 INFO L78 Accepts]: Start accepts. Automaton has 17927 states and 52811 transitions. Word has length 23 [2021-03-10 21:26:53,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:53,635 INFO L480 AbstractCegarLoop]: Abstraction has 17927 states and 52811 transitions. [2021-03-10 21:26:53,635 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:53,635 INFO L276 IsEmpty]: Start isEmpty. Operand 17927 states and 52811 transitions. [2021-03-10 21:26:53,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:53,651 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:53,651 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:53,851 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3369,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:53,851 INFO L428 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:53,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:53,851 INFO L82 PathProgramCache]: Analyzing trace with hash -2053778322, now seen corresponding path program 361 times [2021-03-10 21:26:53,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:53,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203406974] [2021-03-10 21:26:53,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:53,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:53,935 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 27 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:53,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203406974] [2021-03-10 21:26:53,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392615813] [2021-03-10 21:26:53,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:53,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:53,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:54,012 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:26:54,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:54,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 16 [2021-03-10 21:26:54,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325079276] [2021-03-10 21:26:54,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:26:54,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:54,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:26:54,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:26:54,013 INFO L87 Difference]: Start difference. First operand 17927 states and 52811 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:54,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:54,266 INFO L93 Difference]: Finished difference Result 18362 states and 53572 transitions. [2021-03-10 21:26:54,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:26:54,267 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:54,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:54,289 INFO L225 Difference]: With dead ends: 18362 [2021-03-10 21:26:54,289 INFO L226 Difference]: Without dead ends: 18354 [2021-03-10 21:26:54,289 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 178.5ms TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:26:54,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18354 states. [2021-03-10 21:26:54,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18354 to 17927. [2021-03-10 21:26:54,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17927 states, 17926 states have (on average 2.944828740377106) internal successors, (52789), 17926 states have internal predecessors, (52789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:54,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17927 states to 17927 states and 52789 transitions. [2021-03-10 21:26:54,536 INFO L78 Accepts]: Start accepts. Automaton has 17927 states and 52789 transitions. Word has length 23 [2021-03-10 21:26:54,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:54,536 INFO L480 AbstractCegarLoop]: Abstraction has 17927 states and 52789 transitions. [2021-03-10 21:26:54,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 16 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:54,536 INFO L276 IsEmpty]: Start isEmpty. Operand 17927 states and 52789 transitions. [2021-03-10 21:26:54,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:54,550 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:54,550 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:54,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3370 [2021-03-10 21:26:54,751 INFO L428 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:54,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:54,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1798289834, now seen corresponding path program 362 times [2021-03-10 21:26:54,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:54,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85964224] [2021-03-10 21:26:54,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:54,843 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 29 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:54,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85964224] [2021-03-10 21:26:54,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344579268] [2021-03-10 21:26:54,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:54,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:26:54,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:54,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:54,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:54,921 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:54,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:54,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 17 [2021-03-10 21:26:54,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274009081] [2021-03-10 21:26:54,921 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:26:54,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:54,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:26:54,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:26:54,922 INFO L87 Difference]: Start difference. First operand 17927 states and 52789 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:55,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:55,184 INFO L93 Difference]: Finished difference Result 18388 states and 53587 transitions. [2021-03-10 21:26:55,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:26:55,185 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:55,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:55,206 INFO L225 Difference]: With dead ends: 18388 [2021-03-10 21:26:55,206 INFO L226 Difference]: Without dead ends: 18378 [2021-03-10 21:26:55,206 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 193.7ms TimeCoverageRelationStatistics Valid=271, Invalid=599, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:26:55,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18378 states. [2021-03-10 21:26:55,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18378 to 17952. [2021-03-10 21:26:55,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17952 states, 17951 states have (on average 2.9439585538410116) internal successors, (52847), 17951 states have internal predecessors, (52847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:55,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17952 states to 17952 states and 52847 transitions. [2021-03-10 21:26:55,499 INFO L78 Accepts]: Start accepts. Automaton has 17952 states and 52847 transitions. Word has length 23 [2021-03-10 21:26:55,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:55,499 INFO L480 AbstractCegarLoop]: Abstraction has 17952 states and 52847 transitions. [2021-03-10 21:26:55,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:55,499 INFO L276 IsEmpty]: Start isEmpty. Operand 17952 states and 52847 transitions. [2021-03-10 21:26:55,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:55,513 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:55,513 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:55,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3371 [2021-03-10 21:26:55,713 INFO L428 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:55,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:55,714 INFO L82 PathProgramCache]: Analyzing trace with hash 953318382, now seen corresponding path program 363 times [2021-03-10 21:26:55,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:55,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965334282] [2021-03-10 21:26:55,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:55,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:55,809 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:55,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965334282] [2021-03-10 21:26:55,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885722761] [2021-03-10 21:26:55,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:55,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:26:55,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:55,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:26:55,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:55,889 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:55,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:55,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-03-10 21:26:55,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845144339] [2021-03-10 21:26:55,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:26:55,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:55,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:26:55,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:26:55,890 INFO L87 Difference]: Start difference. First operand 17952 states and 52847 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:56,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:56,187 INFO L93 Difference]: Finished difference Result 20163 states and 58154 transitions. [2021-03-10 21:26:56,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:26:56,188 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:56,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:56,213 INFO L225 Difference]: With dead ends: 20163 [2021-03-10 21:26:56,213 INFO L226 Difference]: Without dead ends: 20151 [2021-03-10 21:26:56,213 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 232.9ms TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:26:56,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20151 states. [2021-03-10 21:26:56,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20151 to 17952. [2021-03-10 21:26:56,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17952 states, 17951 states have (on average 2.9437914322321874) internal successors, (52844), 17951 states have internal predecessors, (52844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:56,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17952 states to 17952 states and 52844 transitions. [2021-03-10 21:26:56,456 INFO L78 Accepts]: Start accepts. Automaton has 17952 states and 52844 transitions. Word has length 23 [2021-03-10 21:26:56,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:56,456 INFO L480 AbstractCegarLoop]: Abstraction has 17952 states and 52844 transitions. [2021-03-10 21:26:56,456 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:56,456 INFO L276 IsEmpty]: Start isEmpty. Operand 17952 states and 52844 transitions. [2021-03-10 21:26:56,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:56,471 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:56,471 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:56,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3372 [2021-03-10 21:26:56,671 INFO L428 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:56,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:56,672 INFO L82 PathProgramCache]: Analyzing trace with hash 529007146, now seen corresponding path program 364 times [2021-03-10 21:26:56,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:56,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106140300] [2021-03-10 21:26:56,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:56,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:56,776 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:56,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106140300] [2021-03-10 21:26:56,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742055786] [2021-03-10 21:26:56,776 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:56,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:26:56,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:56,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:56,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:56,856 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:56,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:56,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 18 [2021-03-10 21:26:56,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025227150] [2021-03-10 21:26:56,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:26:56,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:56,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:26:56,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:26:56,856 INFO L87 Difference]: Start difference. First operand 17952 states and 52844 transitions. Second operand has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:57,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:57,173 INFO L93 Difference]: Finished difference Result 20184 states and 58174 transitions. [2021-03-10 21:26:57,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:26:57,174 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:57,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:57,200 INFO L225 Difference]: With dead ends: 20184 [2021-03-10 21:26:57,200 INFO L226 Difference]: Without dead ends: 20170 [2021-03-10 21:26:57,200 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 255.9ms TimeCoverageRelationStatistics Valid=368, Invalid=822, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:26:57,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20170 states. [2021-03-10 21:26:57,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20170 to 17968. [2021-03-10 21:26:57,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17968 states, 17967 states have (on average 2.9436745143874883) internal successors, (52889), 17967 states have internal predecessors, (52889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:57,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17968 states to 17968 states and 52889 transitions. [2021-03-10 21:26:57,453 INFO L78 Accepts]: Start accepts. Automaton has 17968 states and 52889 transitions. Word has length 23 [2021-03-10 21:26:57,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:57,453 INFO L480 AbstractCegarLoop]: Abstraction has 17968 states and 52889 transitions. [2021-03-10 21:26:57,453 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.5789473684210527) internal successors, (30), 18 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:57,453 INFO L276 IsEmpty]: Start isEmpty. Operand 17968 states and 52889 transitions. [2021-03-10 21:26:57,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:57,468 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:57,468 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:57,668 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3373 [2021-03-10 21:26:57,668 INFO L428 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:57,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:57,669 INFO L82 PathProgramCache]: Analyzing trace with hash 260260718, now seen corresponding path program 365 times [2021-03-10 21:26:57,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:57,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156604460] [2021-03-10 21:26:57,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:57,801 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:57,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156604460] [2021-03-10 21:26:57,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286188072] [2021-03-10 21:26:57,801 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:57,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:26:57,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:57,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:26:57,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:57,884 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:57,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:57,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2021-03-10 21:26:57,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500521333] [2021-03-10 21:26:57,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:26:57,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:57,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:26:57,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:26:57,885 INFO L87 Difference]: Start difference. First operand 17968 states and 52889 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:58,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:58,294 INFO L93 Difference]: Finished difference Result 19526 states and 56440 transitions. [2021-03-10 21:26:58,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:26:58,295 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:58,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:58,319 INFO L225 Difference]: With dead ends: 19526 [2021-03-10 21:26:58,319 INFO L226 Difference]: Without dead ends: 19510 [2021-03-10 21:26:58,320 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 352.3ms TimeCoverageRelationStatistics Valid=488, Invalid=1072, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:26:58,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19510 states. [2021-03-10 21:26:58,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19510 to 17968. [2021-03-10 21:26:58,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17968 states, 17967 states have (on average 2.9435631991985307) internal successors, (52887), 17967 states have internal predecessors, (52887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:58,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17968 states to 17968 states and 52887 transitions. [2021-03-10 21:26:58,576 INFO L78 Accepts]: Start accepts. Automaton has 17968 states and 52887 transitions. Word has length 23 [2021-03-10 21:26:58,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:58,576 INFO L480 AbstractCegarLoop]: Abstraction has 17968 states and 52887 transitions. [2021-03-10 21:26:58,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:58,576 INFO L276 IsEmpty]: Start isEmpty. Operand 17968 states and 52887 transitions. [2021-03-10 21:26:58,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:58,591 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:58,591 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:58,791 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 367 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3374 [2021-03-10 21:26:58,791 INFO L428 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:58,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:58,791 INFO L82 PathProgramCache]: Analyzing trace with hash -333235662, now seen corresponding path program 366 times [2021-03-10 21:26:58,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:58,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435918220] [2021-03-10 21:26:58,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:58,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:58,890 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:58,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435918220] [2021-03-10 21:26:58,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351559402] [2021-03-10 21:26:58,890 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:58,911 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 21:26:58,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:26:58,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:26:58,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:58,969 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:26:58,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:58,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 17 [2021-03-10 21:26:58,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584466747] [2021-03-10 21:26:58,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:26:58,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:58,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:26:58,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:26:58,970 INFO L87 Difference]: Start difference. First operand 17968 states and 52887 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:59,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:26:59,186 INFO L93 Difference]: Finished difference Result 18372 states and 53657 transitions. [2021-03-10 21:26:59,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:26:59,187 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:26:59,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:26:59,209 INFO L225 Difference]: With dead ends: 18372 [2021-03-10 21:26:59,209 INFO L226 Difference]: Without dead ends: 18368 [2021-03-10 21:26:59,209 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 156.5ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:26:59,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18368 states. [2021-03-10 21:26:59,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18368 to 18048. [2021-03-10 21:26:59,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18048 states, 18047 states have (on average 2.9450878262315068) internal successors, (53150), 18047 states have internal predecessors, (53150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:59,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18048 states to 18048 states and 53150 transitions. [2021-03-10 21:26:59,502 INFO L78 Accepts]: Start accepts. Automaton has 18048 states and 53150 transitions. Word has length 23 [2021-03-10 21:26:59,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:26:59,502 INFO L480 AbstractCegarLoop]: Abstraction has 18048 states and 53150 transitions. [2021-03-10 21:26:59,502 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:26:59,502 INFO L276 IsEmpty]: Start isEmpty. Operand 18048 states and 53150 transitions. [2021-03-10 21:26:59,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:26:59,518 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:26:59,518 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:26:59,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3375 [2021-03-10 21:26:59,718 INFO L428 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:26:59,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:26:59,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1411119828, now seen corresponding path program 367 times [2021-03-10 21:26:59,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:26:59,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163927875] [2021-03-10 21:26:59,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:26:59,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:59,818 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:26:59,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163927875] [2021-03-10 21:26:59,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539894447] [2021-03-10 21:26:59,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:26:59,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:26:59,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:26:59,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:26:59,907 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:26:59,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:26:59,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 18 [2021-03-10 21:26:59,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354942249] [2021-03-10 21:26:59,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:26:59,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:26:59,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:26:59,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:26:59,908 INFO L87 Difference]: Start difference. First operand 18048 states and 53150 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:00,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:00,182 INFO L93 Difference]: Finished difference Result 19818 states and 57386 transitions. [2021-03-10 21:27:00,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:27:00,183 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:27:00,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:00,208 INFO L225 Difference]: With dead ends: 19818 [2021-03-10 21:27:00,209 INFO L226 Difference]: Without dead ends: 19806 [2021-03-10 21:27:00,209 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 215.9ms TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:27:00,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19806 states. [2021-03-10 21:27:00,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19806 to 18048. [2021-03-10 21:27:00,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18048 states, 18047 states have (on average 2.9444228957721506) internal successors, (53138), 18047 states have internal predecessors, (53138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:00,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18048 states to 18048 states and 53138 transitions. [2021-03-10 21:27:00,475 INFO L78 Accepts]: Start accepts. Automaton has 18048 states and 53138 transitions. Word has length 23 [2021-03-10 21:27:00,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:00,475 INFO L480 AbstractCegarLoop]: Abstraction has 18048 states and 53138 transitions. [2021-03-10 21:27:00,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:00,475 INFO L276 IsEmpty]: Start isEmpty. Operand 18048 states and 53138 transitions. [2021-03-10 21:27:00,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:27:00,491 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:00,491 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:00,692 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3376,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:00,692 INFO L428 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:00,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:00,692 INFO L82 PathProgramCache]: Analyzing trace with hash 986808592, now seen corresponding path program 368 times [2021-03-10 21:27:00,692 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:00,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824777133] [2021-03-10 21:27:00,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:00,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:00,802 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:00,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824777133] [2021-03-10 21:27:00,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [953570733] [2021-03-10 21:27:00,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:00,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:27:00,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:00,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:27:00,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:00,892 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 39 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:00,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:00,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 19 [2021-03-10 21:27:00,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605706583] [2021-03-10 21:27:00,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:27:00,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:00,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:27:00,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:27:00,892 INFO L87 Difference]: Start difference. First operand 18048 states and 53138 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:01,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:01,191 INFO L93 Difference]: Finished difference Result 19833 states and 57393 transitions. [2021-03-10 21:27:01,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:27:01,192 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:27:01,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:01,216 INFO L225 Difference]: With dead ends: 19833 [2021-03-10 21:27:01,217 INFO L226 Difference]: Without dead ends: 19819 [2021-03-10 21:27:01,217 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 241.8ms TimeCoverageRelationStatistics Valid=314, Invalid=742, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:27:01,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19819 states. [2021-03-10 21:27:01,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19819 to 18069. [2021-03-10 21:27:01,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18069 states, 18068 states have (on average 2.9438786805401818) internal successors, (53190), 18068 states have internal predecessors, (53190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:01,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18069 states to 18069 states and 53190 transitions. [2021-03-10 21:27:01,487 INFO L78 Accepts]: Start accepts. Automaton has 18069 states and 53190 transitions. Word has length 23 [2021-03-10 21:27:01,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:01,487 INFO L480 AbstractCegarLoop]: Abstraction has 18069 states and 53190 transitions. [2021-03-10 21:27:01,487 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:01,488 INFO L276 IsEmpty]: Start isEmpty. Operand 18069 states and 53190 transitions. [2021-03-10 21:27:01,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:27:01,504 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:01,504 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:01,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3377,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:01,704 INFO L428 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:01,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:01,704 INFO L82 PathProgramCache]: Analyzing trace with hash 718062164, now seen corresponding path program 369 times [2021-03-10 21:27:01,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:01,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602710376] [2021-03-10 21:27:01,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:01,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:01,819 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:01,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602710376] [2021-03-10 21:27:01,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696566441] [2021-03-10 21:27:01,820 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:01,841 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:27:01,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:01,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:27:01,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:01,915 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:01,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:01,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 19 [2021-03-10 21:27:01,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971439542] [2021-03-10 21:27:01,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:27:01,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:01,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:27:01,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:27:01,916 INFO L87 Difference]: Start difference. First operand 18069 states and 53190 transitions. Second operand has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:02,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:02,285 INFO L93 Difference]: Finished difference Result 19689 states and 56930 transitions. [2021-03-10 21:27:02,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:27:02,285 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:27:02,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:02,310 INFO L225 Difference]: With dead ends: 19689 [2021-03-10 21:27:02,310 INFO L226 Difference]: Without dead ends: 19673 [2021-03-10 21:27:02,311 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 314.2ms TimeCoverageRelationStatistics Valid=418, Invalid=988, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:27:02,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19673 states. [2021-03-10 21:27:02,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19673 to 18069. [2021-03-10 21:27:02,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18069 states, 18068 states have (on average 2.943767987602391) internal successors, (53188), 18068 states have internal predecessors, (53188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:02,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18069 states to 18069 states and 53188 transitions. [2021-03-10 21:27:02,562 INFO L78 Accepts]: Start accepts. Automaton has 18069 states and 53188 transitions. Word has length 23 [2021-03-10 21:27:02,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:02,562 INFO L480 AbstractCegarLoop]: Abstraction has 18069 states and 53188 transitions. [2021-03-10 21:27:02,562 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.45) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:02,562 INFO L276 IsEmpty]: Start isEmpty. Operand 18069 states and 53188 transitions. [2021-03-10 21:27:02,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:27:02,577 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:02,577 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:02,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3378 [2021-03-10 21:27:02,777 INFO L428 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:02,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:02,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1747664174, now seen corresponding path program 370 times [2021-03-10 21:27:02,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:02,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665977730] [2021-03-10 21:27:02,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:02,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:02,878 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:02,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665977730] [2021-03-10 21:27:02,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830994188] [2021-03-10 21:27:02,878 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:02,897 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:27:02,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:02,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:27:02,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:02,955 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:02,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:02,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 17 [2021-03-10 21:27:02,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559249151] [2021-03-10 21:27:02,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:27:02,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:02,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:27:02,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:27:02,956 INFO L87 Difference]: Start difference. First operand 18069 states and 53188 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:03,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:03,123 INFO L93 Difference]: Finished difference Result 18782 states and 54828 transitions. [2021-03-10 21:27:03,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:27:03,124 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:27:03,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:03,146 INFO L225 Difference]: With dead ends: 18782 [2021-03-10 21:27:03,146 INFO L226 Difference]: Without dead ends: 18782 [2021-03-10 21:27:03,146 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:27:03,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18782 states. [2021-03-10 21:27:03,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18782 to 18363. [2021-03-10 21:27:03,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18363 states, 18362 states have (on average 2.9503866681189415) internal successors, (54175), 18362 states have internal predecessors, (54175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:03,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18363 states to 18363 states and 54175 transitions. [2021-03-10 21:27:03,444 INFO L78 Accepts]: Start accepts. Automaton has 18363 states and 54175 transitions. Word has length 23 [2021-03-10 21:27:03,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:03,444 INFO L480 AbstractCegarLoop]: Abstraction has 18363 states and 54175 transitions. [2021-03-10 21:27:03,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:03,444 INFO L276 IsEmpty]: Start isEmpty. Operand 18363 states and 54175 transitions. [2021-03-10 21:27:03,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:27:03,460 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:03,461 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:03,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3379,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:03,661 INFO L428 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:03,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:03,661 INFO L82 PathProgramCache]: Analyzing trace with hash -2038116690, now seen corresponding path program 371 times [2021-03-10 21:27:03,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:03,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695276758] [2021-03-10 21:27:03,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:03,781 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:03,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695276758] [2021-03-10 21:27:03,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444343961] [2021-03-10 21:27:03,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:03,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:27:03,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:03,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:27:03,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:03,890 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:03,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:03,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 20 [2021-03-10 21:27:03,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608095189] [2021-03-10 21:27:03,891 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:27:03,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:03,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:27:03,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:27:03,891 INFO L87 Difference]: Start difference. First operand 18363 states and 54175 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:04,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:04,188 INFO L93 Difference]: Finished difference Result 20117 states and 58445 transitions. [2021-03-10 21:27:04,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:27:04,189 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:27:04,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:04,214 INFO L225 Difference]: With dead ends: 20117 [2021-03-10 21:27:04,214 INFO L226 Difference]: Without dead ends: 20101 [2021-03-10 21:27:04,214 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 274.4ms TimeCoverageRelationStatistics Valid=321, Invalid=801, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:27:04,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20101 states. [2021-03-10 21:27:04,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20101 to 18363. [2021-03-10 21:27:04,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18363 states, 18362 states have (on average 2.9502777475220565) internal successors, (54173), 18362 states have internal predecessors, (54173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:04,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18363 states to 18363 states and 54173 transitions. [2021-03-10 21:27:04,467 INFO L78 Accepts]: Start accepts. Automaton has 18363 states and 54173 transitions. Word has length 23 [2021-03-10 21:27:04,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:04,467 INFO L480 AbstractCegarLoop]: Abstraction has 18363 states and 54173 transitions. [2021-03-10 21:27:04,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:04,468 INFO L276 IsEmpty]: Start isEmpty. Operand 18363 states and 54173 transitions. [2021-03-10 21:27:04,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:27:04,484 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:04,484 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:04,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3380 [2021-03-10 21:27:04,685 INFO L428 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:04,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:04,685 INFO L82 PathProgramCache]: Analyzing trace with hash 567863986, now seen corresponding path program 372 times [2021-03-10 21:27:04,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:04,685 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6713001] [2021-03-10 21:27:04,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:04,794 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:04,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6713001] [2021-03-10 21:27:04,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973013705] [2021-03-10 21:27:04,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:04,815 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:27:04,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:04,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:27:04,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:04,875 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 45 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:04,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:04,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 17 [2021-03-10 21:27:04,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765415314] [2021-03-10 21:27:04,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:27:04,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:04,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:27:04,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:27:04,876 INFO L87 Difference]: Start difference. First operand 18363 states and 54173 transitions. Second operand has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:05,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:05,018 INFO L93 Difference]: Finished difference Result 21290 states and 62446 transitions. [2021-03-10 21:27:05,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:27:05,019 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:27:05,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:05,048 INFO L225 Difference]: With dead ends: 21290 [2021-03-10 21:27:05,048 INFO L226 Difference]: Without dead ends: 21290 [2021-03-10 21:27:05,048 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 117.8ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:27:05,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21290 states. [2021-03-10 21:27:05,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21290 to 20833. [2021-03-10 21:27:05,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20833 states, 20832 states have (on average 2.9642857142857144) internal successors, (61752), 20832 states have internal predecessors, (61752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:05,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20833 states to 20833 states and 61752 transitions. [2021-03-10 21:27:05,351 INFO L78 Accepts]: Start accepts. Automaton has 20833 states and 61752 transitions. Word has length 23 [2021-03-10 21:27:05,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:05,351 INFO L480 AbstractCegarLoop]: Abstraction has 20833 states and 61752 transitions. [2021-03-10 21:27:05,351 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.7222222222222223) internal successors, (31), 17 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:05,351 INFO L276 IsEmpty]: Start isEmpty. Operand 20833 states and 61752 transitions. [2021-03-10 21:27:05,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:27:05,367 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:05,367 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:05,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3381 [2021-03-10 21:27:05,568 INFO L428 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:05,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:05,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1981648620, now seen corresponding path program 373 times [2021-03-10 21:27:05,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:05,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181033385] [2021-03-10 21:27:05,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:05,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:05,675 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:05,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181033385] [2021-03-10 21:27:05,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956590909] [2021-03-10 21:27:05,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:05,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:05,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:27:05,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 54 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:05,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:05,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 18 [2021-03-10 21:27:05,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154364951] [2021-03-10 21:27:05,755 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:27:05,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:05,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:27:05,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:27:05,755 INFO L87 Difference]: Start difference. First operand 20833 states and 61752 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:05,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:05,895 INFO L93 Difference]: Finished difference Result 21205 states and 62266 transitions. [2021-03-10 21:27:05,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:27:05,896 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:27:05,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:05,923 INFO L225 Difference]: With dead ends: 21205 [2021-03-10 21:27:05,923 INFO L226 Difference]: Without dead ends: 21205 [2021-03-10 21:27:05,923 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 118.1ms TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:27:05,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21205 states. [2021-03-10 21:27:06,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21205 to 20832. [2021-03-10 21:27:06,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20832 states, 20831 states have (on average 2.964187989054774) internal successors, (61747), 20831 states have internal predecessors, (61747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:06,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20832 states to 20832 states and 61747 transitions. [2021-03-10 21:27:06,232 INFO L78 Accepts]: Start accepts. Automaton has 20832 states and 61747 transitions. Word has length 23 [2021-03-10 21:27:06,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:06,232 INFO L480 AbstractCegarLoop]: Abstraction has 20832 states and 61747 transitions. [2021-03-10 21:27:06,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 18 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:06,232 INFO L276 IsEmpty]: Start isEmpty. Operand 20832 states and 61747 transitions. [2021-03-10 21:27:06,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:27:06,249 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:06,249 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:06,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3382,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:06,449 INFO L428 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:06,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:06,450 INFO L82 PathProgramCache]: Analyzing trace with hash -271035312, now seen corresponding path program 374 times [2021-03-10 21:27:06,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:06,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475638704] [2021-03-10 21:27:06,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:06,557 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:06,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475638704] [2021-03-10 21:27:06,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472398782] [2021-03-10 21:27:06,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:06,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:27:06,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:06,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:27:06,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 49 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:27:06,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:06,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 11] total 17 [2021-03-10 21:27:06,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92417835] [2021-03-10 21:27:06,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:27:06,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:06,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:27:06,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:27:06,630 INFO L87 Difference]: Start difference. First operand 20832 states and 61747 transitions. Second operand has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:06,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:06,870 INFO L93 Difference]: Finished difference Result 21228 states and 62300 transitions. [2021-03-10 21:27:06,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:27:06,870 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:27:06,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:06,966 INFO L225 Difference]: With dead ends: 21228 [2021-03-10 21:27:06,967 INFO L226 Difference]: Without dead ends: 21226 [2021-03-10 21:27:06,967 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 187.5ms TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:27:06,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21226 states. [2021-03-10 21:27:07,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21226 to 20832. [2021-03-10 21:27:07,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20832 states, 20831 states have (on average 2.96409197830157) internal successors, (61745), 20831 states have internal predecessors, (61745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:07,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20832 states to 20832 states and 61745 transitions. [2021-03-10 21:27:07,226 INFO L78 Accepts]: Start accepts. Automaton has 20832 states and 61745 transitions. Word has length 23 [2021-03-10 21:27:07,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:07,226 INFO L480 AbstractCegarLoop]: Abstraction has 20832 states and 61745 transitions. [2021-03-10 21:27:07,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 17 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:07,226 INFO L276 IsEmpty]: Start isEmpty. Operand 20832 states and 61745 transitions. [2021-03-10 21:27:07,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:27:07,241 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:07,241 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:07,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3383 [2021-03-10 21:27:07,442 INFO L428 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:07,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:07,442 INFO L82 PathProgramCache]: Analyzing trace with hash 1218369684, now seen corresponding path program 375 times [2021-03-10 21:27:07,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:07,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927334823] [2021-03-10 21:27:07,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:07,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:07,546 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:07,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927334823] [2021-03-10 21:27:07,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587799754] [2021-03-10 21:27:07,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:07,567 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:27:07,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:07,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:27:07,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 37 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:07,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:07,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 18 [2021-03-10 21:27:07,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762981480] [2021-03-10 21:27:07,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:27:07,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:07,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:27:07,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:27:07,633 INFO L87 Difference]: Start difference. First operand 20832 states and 61745 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:07,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:07,893 INFO L93 Difference]: Finished difference Result 21234 states and 62306 transitions. [2021-03-10 21:27:07,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:27:07,893 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:27:07,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:07,920 INFO L225 Difference]: With dead ends: 21234 [2021-03-10 21:27:07,921 INFO L226 Difference]: Without dead ends: 21230 [2021-03-10 21:27:07,921 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 202.3ms TimeCoverageRelationStatistics Valid=239, Invalid=573, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:27:07,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21230 states. [2021-03-10 21:27:08,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21230 to 20841. [2021-03-10 21:27:08,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20841 states, 20840 states have (on average 2.964299424184261) internal successors, (61776), 20840 states have internal predecessors, (61776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:08,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20841 states to 20841 states and 61776 transitions. [2021-03-10 21:27:08,227 INFO L78 Accepts]: Start accepts. Automaton has 20841 states and 61776 transitions. Word has length 23 [2021-03-10 21:27:08,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:08,227 INFO L480 AbstractCegarLoop]: Abstraction has 20841 states and 61776 transitions. [2021-03-10 21:27:08,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:08,227 INFO L276 IsEmpty]: Start isEmpty. Operand 20841 states and 61776 transitions. [2021-03-10 21:27:08,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:27:08,243 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:08,243 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:08,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3384 [2021-03-10 21:27:08,444 INFO L428 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:08,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:08,444 INFO L82 PathProgramCache]: Analyzing trace with hash 145284304, now seen corresponding path program 376 times [2021-03-10 21:27:08,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:08,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137666598] [2021-03-10 21:27:08,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:08,550 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:08,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137666598] [2021-03-10 21:27:08,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183268378] [2021-03-10 21:27:08,550 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:08,569 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:27:08,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:08,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:27:08,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:08,631 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:27:08,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:08,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 18 [2021-03-10 21:27:08,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379657297] [2021-03-10 21:27:08,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:27:08,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:08,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:27:08,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:27:08,632 INFO L87 Difference]: Start difference. First operand 20841 states and 61776 transitions. Second operand has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:08,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:08,900 INFO L93 Difference]: Finished difference Result 25243 states and 73892 transitions. [2021-03-10 21:27:08,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:27:08,901 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:27:08,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:08,936 INFO L225 Difference]: With dead ends: 25243 [2021-03-10 21:27:08,936 INFO L226 Difference]: Without dead ends: 25237 [2021-03-10 21:27:08,936 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 200.8ms TimeCoverageRelationStatistics Valid=233, Invalid=579, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:27:08,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25237 states. [2021-03-10 21:27:09,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25237 to 20841. [2021-03-10 21:27:09,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20841 states, 20840 states have (on average 2.964011516314779) internal successors, (61770), 20840 states have internal predecessors, (61770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:09,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20841 states to 20841 states and 61770 transitions. [2021-03-10 21:27:09,279 INFO L78 Accepts]: Start accepts. Automaton has 20841 states and 61770 transitions. Word has length 23 [2021-03-10 21:27:09,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:09,280 INFO L480 AbstractCegarLoop]: Abstraction has 20841 states and 61770 transitions. [2021-03-10 21:27:09,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.736842105263158) internal successors, (33), 18 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:09,280 INFO L276 IsEmpty]: Start isEmpty. Operand 20841 states and 61770 transitions. [2021-03-10 21:27:09,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:27:09,297 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:09,297 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:09,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 378 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3385 [2021-03-10 21:27:09,498 INFO L428 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:09,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:09,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1239375892, now seen corresponding path program 377 times [2021-03-10 21:27:09,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:09,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175747475] [2021-03-10 21:27:09,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:09,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:09,606 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 26 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:09,606 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175747475] [2021-03-10 21:27:09,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205017469] [2021-03-10 21:27:09,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:09,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:27:09,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:09,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:27:09,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:09,704 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:09,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:09,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13] total 19 [2021-03-10 21:27:09,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820692397] [2021-03-10 21:27:09,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:27:09,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:09,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:27:09,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:27:09,705 INFO L87 Difference]: Start difference. First operand 20841 states and 61770 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:10,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:10,010 INFO L93 Difference]: Finished difference Result 25260 states and 73908 transitions. [2021-03-10 21:27:10,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:27:10,011 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:27:10,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:10,048 INFO L225 Difference]: With dead ends: 25260 [2021-03-10 21:27:10,048 INFO L226 Difference]: Without dead ends: 25252 [2021-03-10 21:27:10,048 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 224.6ms TimeCoverageRelationStatistics Valid=263, Invalid=667, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:27:10,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25252 states. [2021-03-10 21:27:10,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25252 to 20870. [2021-03-10 21:27:10,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20870 states, 20869 states have (on average 2.9636302649863433) internal successors, (61848), 20869 states have internal predecessors, (61848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:10,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20870 states to 20870 states and 61848 transitions. [2021-03-10 21:27:10,443 INFO L78 Accepts]: Start accepts. Automaton has 20870 states and 61848 transitions. Word has length 23 [2021-03-10 21:27:10,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:10,443 INFO L480 AbstractCegarLoop]: Abstraction has 20870 states and 61848 transitions. [2021-03-10 21:27:10,443 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 19 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:10,443 INFO L276 IsEmpty]: Start isEmpty. Operand 20870 states and 61848 transitions. [2021-03-10 21:27:10,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:27:10,461 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:10,461 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:10,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 379 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3386 [2021-03-10 21:27:10,661 INFO L428 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:10,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:10,662 INFO L82 PathProgramCache]: Analyzing trace with hash 796476752, now seen corresponding path program 378 times [2021-03-10 21:27:10,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:10,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334192954] [2021-03-10 21:27:10,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:10,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:10,768 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 28 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:10,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334192954] [2021-03-10 21:27:10,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281060381] [2021-03-10 21:27:10,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:10,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:27:10,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:10,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:27:10,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:10,862 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:10,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:10,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 19 [2021-03-10 21:27:10,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966947740] [2021-03-10 21:27:10,863 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:27:10,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:10,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:27:10,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:27:10,863 INFO L87 Difference]: Start difference. First operand 20870 states and 61848 transitions. Second operand has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:11,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:11,148 INFO L93 Difference]: Finished difference Result 24954 states and 72952 transitions. [2021-03-10 21:27:11,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:27:11,149 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:27:11,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:11,181 INFO L225 Difference]: With dead ends: 24954 [2021-03-10 21:27:11,182 INFO L226 Difference]: Without dead ends: 24944 [2021-03-10 21:27:11,182 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 228.6ms TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:27:11,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24944 states. [2021-03-10 21:27:11,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24944 to 20870. [2021-03-10 21:27:11,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20870 states, 20869 states have (on average 2.963342757199674) internal successors, (61842), 20869 states have internal predecessors, (61842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:11,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20870 states to 20870 states and 61842 transitions. [2021-03-10 21:27:11,508 INFO L78 Accepts]: Start accepts. Automaton has 20870 states and 61842 transitions. Word has length 23 [2021-03-10 21:27:11,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:11,508 INFO L480 AbstractCegarLoop]: Abstraction has 20870 states and 61842 transitions. [2021-03-10 21:27:11,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.55) internal successors, (31), 19 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:11,508 INFO L276 IsEmpty]: Start isEmpty. Operand 20870 states and 61842 transitions. [2021-03-10 21:27:11,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:27:11,526 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:11,526 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:11,731 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3387,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:11,731 INFO L428 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:11,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:11,731 INFO L82 PathProgramCache]: Analyzing trace with hash -48494700, now seen corresponding path program 379 times [2021-03-10 21:27:11,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:11,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397731152] [2021-03-10 21:27:11,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:11,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:11,843 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:11,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397731152] [2021-03-10 21:27:11,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886998720] [2021-03-10 21:27:11,843 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:11,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:11,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:27:11,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:11,949 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 37 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:11,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:11,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 20 [2021-03-10 21:27:11,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080572745] [2021-03-10 21:27:11,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:27:11,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:11,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:27:11,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=307, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:27:11,950 INFO L87 Difference]: Start difference. First operand 20870 states and 61842 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:12,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:12,268 INFO L93 Difference]: Finished difference Result 24983 states and 72980 transitions. [2021-03-10 21:27:12,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:27:12,269 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:27:12,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:12,305 INFO L225 Difference]: With dead ends: 24983 [2021-03-10 21:27:12,305 INFO L226 Difference]: Without dead ends: 24971 [2021-03-10 21:27:12,305 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 258.1ms TimeCoverageRelationStatistics Valid=293, Invalid=763, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:27:12,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24971 states. [2021-03-10 21:27:12,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24971 to 20967. [2021-03-10 21:27:12,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20967 states, 20966 states have (on average 2.963130783172756) internal successors, (62125), 20966 states have internal predecessors, (62125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:12,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20967 states to 20967 states and 62125 transitions. [2021-03-10 21:27:12,644 INFO L78 Accepts]: Start accepts. Automaton has 20967 states and 62125 transitions. Word has length 23 [2021-03-10 21:27:12,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:12,644 INFO L480 AbstractCegarLoop]: Abstraction has 20967 states and 62125 transitions. [2021-03-10 21:27:12,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:12,645 INFO L276 IsEmpty]: Start isEmpty. Operand 20967 states and 62125 transitions. [2021-03-10 21:27:12,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:27:12,662 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:12,662 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:12,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3388,381 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:12,863 INFO L428 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:12,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:12,866 INFO L82 PathProgramCache]: Analyzing trace with hash -472805936, now seen corresponding path program 380 times [2021-03-10 21:27:12,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:12,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077714412] [2021-03-10 21:27:12,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:12,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:13,016 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 38 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:13,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077714412] [2021-03-10 21:27:13,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079480250] [2021-03-10 21:27:13,016 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:13,037 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:27:13,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:13,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:27:13,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:13,124 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 40 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:27:13,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:13,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 20 [2021-03-10 21:27:13,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120528097] [2021-03-10 21:27:13,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 21:27:13,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:13,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 21:27:13,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:27:13,125 INFO L87 Difference]: Start difference. First operand 20967 states and 62125 transitions. Second operand has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:13,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:13,425 INFO L93 Difference]: Finished difference Result 23366 states and 68426 transitions. [2021-03-10 21:27:13,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:27:13,426 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:27:13,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:13,459 INFO L225 Difference]: With dead ends: 23366 [2021-03-10 21:27:13,459 INFO L226 Difference]: Without dead ends: 23352 [2021-03-10 21:27:13,459 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 277.4ms TimeCoverageRelationStatistics Valid=291, Invalid=765, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:27:13,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23352 states. [2021-03-10 21:27:13,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23352 to 20967. [2021-03-10 21:27:13,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20967 states, 20966 states have (on average 2.9630353906324527) internal successors, (62123), 20966 states have internal predecessors, (62123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:13,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20967 states to 20967 states and 62123 transitions. [2021-03-10 21:27:13,773 INFO L78 Accepts]: Start accepts. Automaton has 20967 states and 62123 transitions. Word has length 23 [2021-03-10 21:27:13,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:13,773 INFO L480 AbstractCegarLoop]: Abstraction has 20967 states and 62123 transitions. [2021-03-10 21:27:13,773 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5714285714285714) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:13,773 INFO L276 IsEmpty]: Start isEmpty. Operand 20967 states and 62123 transitions. [2021-03-10 21:27:13,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:27:13,790 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:13,790 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:13,990 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3389,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:13,990 INFO L428 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:13,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:13,991 INFO L82 PathProgramCache]: Analyzing trace with hash -741552364, now seen corresponding path program 381 times [2021-03-10 21:27:13,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:13,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657854675] [2021-03-10 21:27:13,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:13,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:14,109 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:14,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657854675] [2021-03-10 21:27:14,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641939455] [2021-03-10 21:27:14,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:14,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:27:14,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:14,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:27:14,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:14,339 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:14,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:14,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 21 [2021-03-10 21:27:14,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506864652] [2021-03-10 21:27:14,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 21:27:14,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:14,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 21:27:14,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:27:14,340 INFO L87 Difference]: Start difference. First operand 20967 states and 62123 transitions. Second operand has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:14,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:14,677 INFO L93 Difference]: Finished difference Result 23400 states and 68462 transitions. [2021-03-10 21:27:14,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:27:14,678 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:27:14,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:14,710 INFO L225 Difference]: With dead ends: 23400 [2021-03-10 21:27:14,710 INFO L226 Difference]: Without dead ends: 23384 [2021-03-10 21:27:14,710 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 302.2ms TimeCoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:27:14,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23384 states. [2021-03-10 21:27:14,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23384 to 20978. [2021-03-10 21:27:14,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20978 states, 20977 states have (on average 2.9629594317585926) internal successors, (62154), 20977 states have internal predecessors, (62154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:15,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20978 states to 20978 states and 62154 transitions. [2021-03-10 21:27:15,008 INFO L78 Accepts]: Start accepts. Automaton has 20978 states and 62154 transitions. Word has length 23 [2021-03-10 21:27:15,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:15,008 INFO L480 AbstractCegarLoop]: Abstraction has 20978 states and 62154 transitions. [2021-03-10 21:27:15,008 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.4090909090909092) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:15,008 INFO L276 IsEmpty]: Start isEmpty. Operand 20978 states and 62154 transitions. [2021-03-10 21:27:15,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-03-10 21:27:15,027 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:15,027 INFO L519 BasicCegarLoop]: trace histogram [10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:15,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3390 [2021-03-10 21:27:15,227 INFO L428 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:15,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:15,227 INFO L82 PathProgramCache]: Analyzing trace with hash -482757040, now seen corresponding path program 382 times [2021-03-10 21:27:15,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:15,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997285206] [2021-03-10 21:27:15,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:15,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:15,351 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 46 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:15,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997285206] [2021-03-10 21:27:15,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625801394] [2021-03-10 21:27:15,351 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:15,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:27:15,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:15,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:27:15,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:15,490 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 54 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:15,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:15,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 22 [2021-03-10 21:27:15,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220538297] [2021-03-10 21:27:15,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 21:27:15,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:15,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 21:27:15,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:27:15,491 INFO L87 Difference]: Start difference. First operand 20978 states and 62154 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:15,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:15,786 INFO L93 Difference]: Finished difference Result 21340 states and 63016 transitions. [2021-03-10 21:27:15,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:27:15,787 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-03-10 21:27:15,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:15,813 INFO L225 Difference]: With dead ends: 21340 [2021-03-10 21:27:15,814 INFO L226 Difference]: Without dead ends: 21331 [2021-03-10 21:27:15,814 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 328.4ms TimeCoverageRelationStatistics Valid=322, Invalid=938, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:27:15,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21331 states. [2021-03-10 21:27:16,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21331 to 20978. [2021-03-10 21:27:16,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20978 states, 20977 states have (on average 2.962911760499595) internal successors, (62153), 20977 states have internal predecessors, (62153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:16,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20978 states to 20978 states and 62153 transitions. [2021-03-10 21:27:16,115 INFO L78 Accepts]: Start accepts. Automaton has 20978 states and 62153 transitions. Word has length 23 [2021-03-10 21:27:16,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:16,115 INFO L480 AbstractCegarLoop]: Abstraction has 20978 states and 62153 transitions. [2021-03-10 21:27:16,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 22 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:16,115 INFO L276 IsEmpty]: Start isEmpty. Operand 20978 states and 62153 transitions. [2021-03-10 21:27:16,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:27:16,133 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:16,133 INFO L519 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:16,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3391,384 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:16,333 INFO L428 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:16,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:16,333 INFO L82 PathProgramCache]: Analyzing trace with hash 782455791, now seen corresponding path program 383 times [2021-03-10 21:27:16,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:16,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318802937] [2021-03-10 21:27:16,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:16,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:16,412 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:16,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318802937] [2021-03-10 21:27:16,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707310788] [2021-03-10 21:27:16,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:16,434 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:27:16,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:16,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:27:16,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:16,948 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-03-10 21:27:16,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:27:16,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-03-10 21:27:17,531 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 256 DAG size of output: 230 [2021-03-10 21:27:18,569 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 1067 DAG size of output: 1457 [2021-03-10 21:27:18,823 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 1049 DAG size of output: 1045 [2021-03-10 21:27:20,223 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 917 DAG size of output: 526 [2021-03-10 21:27:22,785 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 337 DAG size of output: 283 [2021-03-10 21:27:23,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:27:23,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:27:23,353 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:27:23,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-03-10 21:27:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:23,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:23,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-03-10 21:27:23,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835460300] [2021-03-10 21:27:23,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:27:23,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:23,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:27:23,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:27:23,360 INFO L87 Difference]: Start difference. First operand 20978 states and 62153 transitions. Second operand has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:23,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:23,873 INFO L93 Difference]: Finished difference Result 21192 states and 62579 transitions. [2021-03-10 21:27:23,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:27:23,874 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:27:23,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:23,900 INFO L225 Difference]: With dead ends: 21192 [2021-03-10 21:27:23,900 INFO L226 Difference]: Without dead ends: 21189 [2021-03-10 21:27:23,900 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 328.1ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:27:23,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21189 states. [2021-03-10 21:27:24,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21189 to 21059. [2021-03-10 21:27:24,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21059 states, 21058 states have (on average 2.9629119574508502) internal successors, (62393), 21058 states have internal predecessors, (62393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:24,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21059 states to 21059 states and 62393 transitions. [2021-03-10 21:27:24,187 INFO L78 Accepts]: Start accepts. Automaton has 21059 states and 62393 transitions. Word has length 24 [2021-03-10 21:27:24,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:24,187 INFO L480 AbstractCegarLoop]: Abstraction has 21059 states and 62393 transitions. [2021-03-10 21:27:24,187 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:24,187 INFO L276 IsEmpty]: Start isEmpty. Operand 21059 states and 62393 transitions. [2021-03-10 21:27:24,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:27:24,204 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:24,204 INFO L519 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:24,404 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3392,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:24,405 INFO L428 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:24,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:24,405 INFO L82 PathProgramCache]: Analyzing trace with hash -840131025, now seen corresponding path program 384 times [2021-03-10 21:27:24,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:24,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191643863] [2021-03-10 21:27:24,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:24,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:24,482 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:24,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191643863] [2021-03-10 21:27:24,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645681137] [2021-03-10 21:27:24,483 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:24,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:27:24,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:24,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:27:24,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:25,015 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-03-10 21:27:25,015 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:27:25,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-03-10 21:27:25,708 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 21:27:27,289 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 94 [2021-03-10 21:27:28,792 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 136 [2021-03-10 21:27:28,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:27:28,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:27:28,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:27:28,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-03-10 21:27:28,945 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:28,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:28,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-03-10 21:27:28,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561177102] [2021-03-10 21:27:28,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:27:28,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:28,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:27:28,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:27:28,946 INFO L87 Difference]: Start difference. First operand 21059 states and 62393 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:29,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:29,299 INFO L93 Difference]: Finished difference Result 21285 states and 62822 transitions. [2021-03-10 21:27:29,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:27:29,299 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:27:29,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:29,329 INFO L225 Difference]: With dead ends: 21285 [2021-03-10 21:27:29,330 INFO L226 Difference]: Without dead ends: 21282 [2021-03-10 21:27:29,330 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 327.3ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:27:29,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21282 states. [2021-03-10 21:27:29,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21282 to 21109. [2021-03-10 21:27:29,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21109 states, 21108 states have (on average 2.9639946939548985) internal successors, (62564), 21108 states have internal predecessors, (62564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:29,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21109 states to 21109 states and 62564 transitions. [2021-03-10 21:27:29,691 INFO L78 Accepts]: Start accepts. Automaton has 21109 states and 62564 transitions. Word has length 24 [2021-03-10 21:27:29,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:29,691 INFO L480 AbstractCegarLoop]: Abstraction has 21109 states and 62564 transitions. [2021-03-10 21:27:29,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:29,692 INFO L276 IsEmpty]: Start isEmpty. Operand 21109 states and 62564 transitions. [2021-03-10 21:27:29,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:27:29,708 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:29,708 INFO L519 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:29,908 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable4893 [2021-03-10 21:27:29,909 INFO L428 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:29,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:29,909 INFO L82 PathProgramCache]: Analyzing trace with hash 156074215, now seen corresponding path program 385 times [2021-03-10 21:27:29,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:29,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624482960] [2021-03-10 21:27:29,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:29,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:29,992 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:27:29,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624482960] [2021-03-10 21:27:29,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181773222] [2021-03-10 21:27:29,992 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:30,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:30,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:27:30,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:30,531 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-03-10 21:27:30,531 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:27:30,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-03-10 21:27:35,929 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 172 DAG size of output: 120 [2021-03-10 21:27:36,159 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 1417 DAG size of output: 844 [2021-03-10 21:27:36,317 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 1733 DAG size of output: 1075 [2021-03-10 21:27:36,476 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 1733 DAG size of output: 1075 [2021-03-10 21:27:36,639 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 1739 DAG size of output: 1081 [2021-03-10 21:27:36,749 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 1083 DAG size of output: 1089 [2021-03-10 21:27:37,418 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 414 DAG size of output: 253 [2021-03-10 21:27:38,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:27:38,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:27:38,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:27:38,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-03-10 21:27:38,078 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:38,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:38,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-03-10 21:27:38,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146153106] [2021-03-10 21:27:38,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:27:38,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:38,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:27:38,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:27:38,078 INFO L87 Difference]: Start difference. First operand 21109 states and 62564 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:38,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:38,498 INFO L93 Difference]: Finished difference Result 21361 states and 63065 transitions. [2021-03-10 21:27:38,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:27:38,499 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:27:38,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:38,524 INFO L225 Difference]: With dead ends: 21361 [2021-03-10 21:27:38,524 INFO L226 Difference]: Without dead ends: 21358 [2021-03-10 21:27:38,524 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 338.9ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:27:38,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21358 states. [2021-03-10 21:27:38,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21358 to 21176. [2021-03-10 21:27:38,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21176 states, 21175 states have (on average 2.965383707201889) internal successors, (62792), 21175 states have internal predecessors, (62792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:38,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21176 states to 21176 states and 62792 transitions. [2021-03-10 21:27:38,814 INFO L78 Accepts]: Start accepts. Automaton has 21176 states and 62792 transitions. Word has length 24 [2021-03-10 21:27:38,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:38,814 INFO L480 AbstractCegarLoop]: Abstraction has 21176 states and 62792 transitions. [2021-03-10 21:27:38,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:38,814 INFO L276 IsEmpty]: Start isEmpty. Operand 21176 states and 62792 transitions. [2021-03-10 21:27:38,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:27:38,830 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:38,830 INFO L519 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:39,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5738,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:39,031 INFO L428 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:39,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:39,031 INFO L82 PathProgramCache]: Analyzing trace with hash 973665583, now seen corresponding path program 386 times [2021-03-10 21:27:39,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:39,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191572273] [2021-03-10 21:27:39,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:39,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:39,109 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:39,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191572273] [2021-03-10 21:27:39,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390109340] [2021-03-10 21:27:39,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:39,129 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:27:39,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:39,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:27:39,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:39,637 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-03-10 21:27:39,637 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:27:39,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-03-10 21:27:40,795 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 951 DAG size of output: 775 [2021-03-10 21:27:42,820 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2021-03-10 21:27:44,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:27:44,354 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:27:44,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:27:44,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-03-10 21:27:44,362 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:44,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:44,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-03-10 21:27:44,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976746916] [2021-03-10 21:27:44,362 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:27:44,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:44,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:27:44,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:27:44,363 INFO L87 Difference]: Start difference. First operand 21176 states and 62792 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:44,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:44,783 INFO L93 Difference]: Finished difference Result 21460 states and 63374 transitions. [2021-03-10 21:27:44,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:27:44,784 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:27:44,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:44,814 INFO L225 Difference]: With dead ends: 21460 [2021-03-10 21:27:44,815 INFO L226 Difference]: Without dead ends: 21457 [2021-03-10 21:27:44,815 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 325.9ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:27:44,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21457 states. [2021-03-10 21:27:45,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21457 to 21256. [2021-03-10 21:27:45,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21256 states, 21255 states have (on average 2.967254763585039) internal successors, (63069), 21255 states have internal predecessors, (63069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:45,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21256 states to 21256 states and 63069 transitions. [2021-03-10 21:27:45,115 INFO L78 Accepts]: Start accepts. Automaton has 21256 states and 63069 transitions. Word has length 24 [2021-03-10 21:27:45,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:45,115 INFO L480 AbstractCegarLoop]: Abstraction has 21256 states and 63069 transitions. [2021-03-10 21:27:45,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:45,115 INFO L276 IsEmpty]: Start isEmpty. Operand 21256 states and 63069 transitions. [2021-03-10 21:27:45,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:27:45,132 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:45,132 INFO L519 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:45,333 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8151,388 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:45,333 INFO L428 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:45,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:45,333 INFO L82 PathProgramCache]: Analyzing trace with hash 549194215, now seen corresponding path program 387 times [2021-03-10 21:27:45,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:45,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565586425] [2021-03-10 21:27:45,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:45,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:45,409 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:27:45,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565586425] [2021-03-10 21:27:45,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969146016] [2021-03-10 21:27:45,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:45,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 21:27:45,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:45,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:27:45,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:46,063 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-03-10 21:27:46,063 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:27:46,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-03-10 21:27:48,133 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 1416 DAG size of output: 886 [2021-03-10 21:27:48,242 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 1422 DAG size of output: 892 [2021-03-10 21:27:48,364 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 894 DAG size of output: 999 [2021-03-10 21:27:50,060 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 1141 DAG size of output: 652 [2021-03-10 21:27:50,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:27:50,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:27:50,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:27:50,886 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-03-10 21:27:50,893 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:50,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:50,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-03-10 21:27:50,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437396850] [2021-03-10 21:27:50,894 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:27:50,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:50,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:27:50,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:27:50,894 INFO L87 Difference]: Start difference. First operand 21256 states and 63069 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:51,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:51,247 INFO L93 Difference]: Finished difference Result 21580 states and 63776 transitions. [2021-03-10 21:27:51,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:27:51,247 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:27:51,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:51,274 INFO L225 Difference]: With dead ends: 21580 [2021-03-10 21:27:51,274 INFO L226 Difference]: Without dead ends: 21577 [2021-03-10 21:27:51,275 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 449.6ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:27:51,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21577 states. [2021-03-10 21:27:51,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21577 to 21367. [2021-03-10 21:27:51,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21367 states, 21366 states have (on average 2.9702798839277356) internal successors, (63463), 21366 states have internal predecessors, (63463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:51,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21367 states to 21367 states and 63463 transitions. [2021-03-10 21:27:51,564 INFO L78 Accepts]: Start accepts. Automaton has 21367 states and 63463 transitions. Word has length 24 [2021-03-10 21:27:51,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:51,564 INFO L480 AbstractCegarLoop]: Abstraction has 21367 states and 63463 transitions. [2021-03-10 21:27:51,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:51,564 INFO L276 IsEmpty]: Start isEmpty. Operand 21367 states and 63463 transitions. [2021-03-10 21:27:51,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:27:51,583 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:51,584 INFO L519 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:51,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9449,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:51,784 INFO L428 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:51,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:51,784 INFO L82 PathProgramCache]: Analyzing trace with hash 275483695, now seen corresponding path program 388 times [2021-03-10 21:27:51,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:51,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274872203] [2021-03-10 21:27:51,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:51,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:27:51,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274872203] [2021-03-10 21:27:51,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776218449] [2021-03-10 21:27:51,860 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:51,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:27:51,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:51,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:27:51,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:52,385 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-03-10 21:27:52,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:27:52,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-03-10 21:27:55,667 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 327 DAG size of output: 304 [2021-03-10 21:27:57,221 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:27:57,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:27:57,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:27:57,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-03-10 21:27:57,230 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:27:57,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:27:57,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-03-10 21:27:57,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546538092] [2021-03-10 21:27:57,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:27:57,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:27:57,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:27:57,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:27:57,231 INFO L87 Difference]: Start difference. First operand 21367 states and 63463 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:57,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:27:57,799 INFO L93 Difference]: Finished difference Result 21704 states and 64205 transitions. [2021-03-10 21:27:57,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:27:57,799 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:27:57,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:27:57,828 INFO L225 Difference]: With dead ends: 21704 [2021-03-10 21:27:57,829 INFO L226 Difference]: Without dead ends: 21701 [2021-03-10 21:27:57,829 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 322.5ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:27:57,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21701 states. [2021-03-10 21:27:58,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21701 to 21484. [2021-03-10 21:27:58,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21484 states, 21483 states have (on average 2.973746683424103) internal successors, (63885), 21483 states have internal predecessors, (63885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:58,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21484 states to 21484 states and 63885 transitions. [2021-03-10 21:27:58,140 INFO L78 Accepts]: Start accepts. Automaton has 21484 states and 63885 transitions. Word has length 24 [2021-03-10 21:27:58,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:27:58,140 INFO L480 AbstractCegarLoop]: Abstraction has 21484 states and 63885 transitions. [2021-03-10 21:27:58,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:27:58,140 INFO L276 IsEmpty]: Start isEmpty. Operand 21484 states and 63885 transitions. [2021-03-10 21:27:58,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:27:58,158 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:27:58,158 INFO L519 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:27:58,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10529 [2021-03-10 21:27:58,359 INFO L428 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:27:58,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:27:58,359 INFO L82 PathProgramCache]: Analyzing trace with hash 380392167, now seen corresponding path program 389 times [2021-03-10 21:27:58,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:27:58,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929408941] [2021-03-10 21:27:58,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:27:58,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:27:58,433 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:27:58,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929408941] [2021-03-10 21:27:58,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030097808] [2021-03-10 21:27:58,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:27:58,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:27:58,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:27:58,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:27:58,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:27:58,962 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-03-10 21:27:58,963 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:27:58,963 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-03-10 21:27:59,361 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 21:28:01,594 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 262 DAG size of output: 287 [2021-03-10 21:28:03,947 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 1198 DAG size of output: 980 [2021-03-10 21:28:04,254 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 2159 DAG size of output: 1442 [2021-03-10 21:28:04,469 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 2159 DAG size of output: 1442 [2021-03-10 21:28:04,687 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 2166 DAG size of output: 1449 [2021-03-10 21:28:04,921 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 1451 DAG size of output: 1725 [2021-03-10 21:28:05,550 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 991 DAG size of output: 946 [2021-03-10 21:28:05,757 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 284 DAG size of output: 284 [2021-03-10 21:28:06,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:06,878 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:06,879 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:28:06,879 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-03-10 21:28:06,887 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:06,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:06,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-03-10 21:28:06,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917788720] [2021-03-10 21:28:06,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:28:06,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:06,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:28:06,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:28:06,887 INFO L87 Difference]: Start difference. First operand 21484 states and 63885 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:07,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:07,436 INFO L93 Difference]: Finished difference Result 21935 states and 64985 transitions. [2021-03-10 21:28:07,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:28:07,437 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:28:07,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:07,469 INFO L225 Difference]: With dead ends: 21935 [2021-03-10 21:28:07,469 INFO L226 Difference]: Without dead ends: 21932 [2021-03-10 21:28:07,470 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 324.2ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:28:07,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21932 states. [2021-03-10 21:28:07,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21932 to 21709. [2021-03-10 21:28:07,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21709 states, 21708 states have (on average 2.9790399852588907) internal successors, (64669), 21708 states have internal predecessors, (64669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:07,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21709 states to 21709 states and 64669 transitions. [2021-03-10 21:28:07,794 INFO L78 Accepts]: Start accepts. Automaton has 21709 states and 64669 transitions. Word has length 24 [2021-03-10 21:28:07,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:07,794 INFO L480 AbstractCegarLoop]: Abstraction has 21709 states and 64669 transitions. [2021-03-10 21:28:07,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:07,794 INFO L276 IsEmpty]: Start isEmpty. Operand 21709 states and 64669 transitions. [2021-03-10 21:28:07,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:28:07,812 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:07,812 INFO L519 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:08,012 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 391 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11870 [2021-03-10 21:28:08,013 INFO L428 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:08,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:08,013 INFO L82 PathProgramCache]: Analyzing trace with hash -662412497, now seen corresponding path program 390 times [2021-03-10 21:28:08,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:08,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378036779] [2021-03-10 21:28:08,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:08,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:08,088 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:28:08,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378036779] [2021-03-10 21:28:08,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746996031] [2021-03-10 21:28:08,088 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:08,109 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:28:08,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:08,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:28:08,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:08,617 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-03-10 21:28:08,618 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:08,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-03-10 21:28:09,459 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 40 [2021-03-10 21:28:11,439 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 1815 DAG size of output: 1262 [2021-03-10 21:28:11,579 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 1264 DAG size of output: 1494 [2021-03-10 21:28:11,816 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 1129 DAG size of output: 1342 [2021-03-10 21:28:14,308 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 419 DAG size of output: 371 [2021-03-10 21:28:15,895 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 1361 DAG size of output: 1038 [2021-03-10 21:28:16,080 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 1520 DAG size of output: 1148 [2021-03-10 21:28:16,282 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 1682 DAG size of output: 1227 [2021-03-10 21:28:16,631 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 2107 DAG size of output: 1546 [2021-03-10 21:28:16,920 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 2783 DAG size of output: 2028 [2021-03-10 21:28:17,260 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 3174 DAG size of output: 2232 [2021-03-10 21:28:17,601 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 3174 DAG size of output: 2232 [2021-03-10 21:28:17,958 WARN L205 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 3180 DAG size of output: 2238 [2021-03-10 21:28:18,469 WARN L205 SmtUtils]: Spent 497.00 ms on a formula simplification. DAG size of input: 2240 DAG size of output: 2627 [2021-03-10 21:28:18,684 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 1733 DAG size of output: 1711 [2021-03-10 21:28:18,852 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 1553 DAG size of output: 1540 [2021-03-10 21:28:19,000 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 1339 DAG size of output: 1313 [2021-03-10 21:28:19,171 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 1175 DAG size of output: 1144 [2021-03-10 21:28:20,276 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 2474 DAG size of output: 1051 [2021-03-10 21:28:20,415 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 2474 DAG size of output: 1051 [2021-03-10 21:28:20,555 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 2479 DAG size of output: 1056 [2021-03-10 21:28:20,664 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 1058 DAG size of output: 1081 [2021-03-10 21:28:21,684 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:21,686 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:21,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:28:21,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-03-10 21:28:21,694 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:21,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:21,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-03-10 21:28:21,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259555807] [2021-03-10 21:28:21,695 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:28:21,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:21,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:28:21,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:28:21,695 INFO L87 Difference]: Start difference. First operand 21709 states and 64669 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:22,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:22,136 INFO L93 Difference]: Finished difference Result 22176 states and 65792 transitions. [2021-03-10 21:28:22,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:28:22,137 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:28:22,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:22,166 INFO L225 Difference]: With dead ends: 22176 [2021-03-10 21:28:22,166 INFO L226 Difference]: Without dead ends: 22173 [2021-03-10 21:28:22,166 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 326.5ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:28:22,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22173 states. [2021-03-10 21:28:22,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22173 to 21946. [2021-03-10 21:28:22,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21946 states, 21945 states have (on average 2.983732057416268) internal successors, (65478), 21945 states have internal predecessors, (65478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:22,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21946 states to 21946 states and 65478 transitions. [2021-03-10 21:28:22,496 INFO L78 Accepts]: Start accepts. Automaton has 21946 states and 65478 transitions. Word has length 24 [2021-03-10 21:28:22,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:22,496 INFO L480 AbstractCegarLoop]: Abstraction has 21946 states and 65478 transitions. [2021-03-10 21:28:22,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:22,496 INFO L276 IsEmpty]: Start isEmpty. Operand 21946 states and 65478 transitions. [2021-03-10 21:28:22,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:28:22,515 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:22,515 INFO L519 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:22,715 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13588 [2021-03-10 21:28:22,716 INFO L428 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:22,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:22,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1370381287, now seen corresponding path program 391 times [2021-03-10 21:28:22,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:22,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083246081] [2021-03-10 21:28:22,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:22,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:22,792 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:28:22,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083246081] [2021-03-10 21:28:22,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132545617] [2021-03-10 21:28:22,792 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:22,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:22,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:28:22,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:23,326 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-03-10 21:28:23,327 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:23,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-03-10 21:28:23,538 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 72 [2021-03-10 21:28:25,829 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 91 [2021-03-10 21:28:26,871 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 1440 DAG size of output: 873 [2021-03-10 21:28:27,011 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 1440 DAG size of output: 873 [2021-03-10 21:28:27,159 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 1451 DAG size of output: 884 [2021-03-10 21:28:27,838 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-03-10 21:28:28,984 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 1030 DAG size of output: 820 [2021-03-10 21:28:29,996 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 62 [2021-03-10 21:28:30,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:30,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:30,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:28:30,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-03-10 21:28:30,151 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:30,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:30,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-03-10 21:28:30,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159854256] [2021-03-10 21:28:30,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:28:30,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:30,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:28:30,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:28:30,152 INFO L87 Difference]: Start difference. First operand 21946 states and 65478 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:30,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:30,635 INFO L93 Difference]: Finished difference Result 23670 states and 70444 transitions. [2021-03-10 21:28:30,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:28:30,636 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:28:30,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:30,667 INFO L225 Difference]: With dead ends: 23670 [2021-03-10 21:28:30,667 INFO L226 Difference]: Without dead ends: 23667 [2021-03-10 21:28:30,667 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 331.7ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:28:30,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23667 states. [2021-03-10 21:28:30,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23667 to 23451. [2021-03-10 21:28:30,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23451 states, 23450 states have (on average 2.99181236673774) internal successors, (70158), 23450 states have internal predecessors, (70158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:30,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23451 states to 23451 states and 70158 transitions. [2021-03-10 21:28:30,995 INFO L78 Accepts]: Start accepts. Automaton has 23451 states and 70158 transitions. Word has length 24 [2021-03-10 21:28:30,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:30,995 INFO L480 AbstractCegarLoop]: Abstraction has 23451 states and 70158 transitions. [2021-03-10 21:28:30,995 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:30,995 INFO L276 IsEmpty]: Start isEmpty. Operand 23451 states and 70158 transitions. [2021-03-10 21:28:31,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:28:31,015 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:31,015 INFO L519 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:31,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 393 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16763 [2021-03-10 21:28:31,215 INFO L428 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:31,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:31,216 INFO L82 PathProgramCache]: Analyzing trace with hash -37520849, now seen corresponding path program 392 times [2021-03-10 21:28:31,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:31,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743265552] [2021-03-10 21:28:31,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:31,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:31,307 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:28:31,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743265552] [2021-03-10 21:28:31,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876897581] [2021-03-10 21:28:31,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:31,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:28:31,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:31,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:28:31,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:31,849 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-03-10 21:28:31,849 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:31,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-03-10 21:28:34,252 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 1195 DAG size of output: 748 [2021-03-10 21:28:34,363 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 1195 DAG size of output: 748 [2021-03-10 21:28:34,474 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 1202 DAG size of output: 755 [2021-03-10 21:28:35,083 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:35,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:35,085 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:28:35,085 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-03-10 21:28:35,093 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:35,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:35,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-03-10 21:28:35,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555996895] [2021-03-10 21:28:35,093 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:28:35,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:35,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:28:35,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:28:35,093 INFO L87 Difference]: Start difference. First operand 23451 states and 70158 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:35,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:35,481 INFO L93 Difference]: Finished difference Result 29480 states and 87930 transitions. [2021-03-10 21:28:35,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:28:35,482 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:28:35,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:35,522 INFO L225 Difference]: With dead ends: 29480 [2021-03-10 21:28:35,522 INFO L226 Difference]: Without dead ends: 29477 [2021-03-10 21:28:35,522 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 336.8ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:28:35,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29477 states. [2021-03-10 21:28:35,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29477 to 29259. [2021-03-10 21:28:35,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29259 states, 29258 states have (on average 2.995830200287101) internal successors, (87652), 29258 states have internal predecessors, (87652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:35,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29259 states to 29259 states and 87652 transitions. [2021-03-10 21:28:35,946 INFO L78 Accepts]: Start accepts. Automaton has 29259 states and 87652 transitions. Word has length 24 [2021-03-10 21:28:35,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:35,946 INFO L480 AbstractCegarLoop]: Abstraction has 29259 states and 87652 transitions. [2021-03-10 21:28:35,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:35,946 INFO L276 IsEmpty]: Start isEmpty. Operand 29259 states and 87652 transitions. [2021-03-10 21:28:35,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:28:35,974 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:35,974 INFO L519 BasicCegarLoop]: trace histogram [10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:36,174 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable18216 [2021-03-10 21:28:36,175 INFO L428 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:36,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:36,175 INFO L82 PathProgramCache]: Analyzing trace with hash -732814105, now seen corresponding path program 393 times [2021-03-10 21:28:36,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:36,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716725414] [2021-03-10 21:28:36,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:36,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:36,258 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:28:36,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716725414] [2021-03-10 21:28:36,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18097094] [2021-03-10 21:28:36,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:36,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:28:36,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:36,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-03-10 21:28:36,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:36,800 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification that was a NOOP. DAG size: 201 [2021-03-10 21:28:36,800 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:36,800 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 19 new quantified variables, introduced 45 case distinctions, treesize of input 47 treesize of output 394 [2021-03-10 21:28:37,042 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 151 DAG size of output: 146 [2021-03-10 21:28:39,053 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 2221 DAG size of output: 1943 [2021-03-10 21:28:39,176 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 2221 DAG size of output: 1943 [2021-03-10 21:28:39,312 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 2236 DAG size of output: 1958 [2021-03-10 21:28:39,545 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 1952 DAG size of output: 1943 [2021-03-10 21:28:41,786 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 1558 DAG size of output: 1056 [2021-03-10 21:28:43,793 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 2753 DAG size of output: 1582 [2021-03-10 21:28:43,974 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 2753 DAG size of output: 1582 [2021-03-10 21:28:44,376 WARN L205 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 2761 DAG size of output: 1781 [2021-03-10 21:28:44,498 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 1457 DAG size of output: 1277 [2021-03-10 21:28:46,737 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 99 [2021-03-10 21:28:47,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:28:47,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:28:47,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:28:47,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:3 [2021-03-10 21:28:47,412 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:47,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:47,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17] total 27 [2021-03-10 21:28:47,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791522371] [2021-03-10 21:28:47,413 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 21:28:47,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:47,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 21:28:47,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:28:47,413 INFO L87 Difference]: Start difference. First operand 29259 states and 87652 transitions. Second operand has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:47,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:47,908 INFO L93 Difference]: Finished difference Result 34712 states and 103669 transitions. [2021-03-10 21:28:47,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:28:47,909 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:28:47,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:47,964 INFO L225 Difference]: With dead ends: 34712 [2021-03-10 21:28:47,964 INFO L226 Difference]: Without dead ends: 34709 [2021-03-10 21:28:47,964 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 339.6ms TimeCoverageRelationStatistics Valid=68, Invalid=688, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:28:47,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34709 states. [2021-03-10 21:28:48,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34709 to 34499. [2021-03-10 21:28:48,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34499 states, 34498 states have (on average 2.997362165922662) internal successors, (103403), 34498 states have internal predecessors, (103403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:48,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34499 states to 34499 states and 103403 transitions. [2021-03-10 21:28:48,465 INFO L78 Accepts]: Start accepts. Automaton has 34499 states and 103403 transitions. Word has length 24 [2021-03-10 21:28:48,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:48,465 INFO L480 AbstractCegarLoop]: Abstraction has 34499 states and 103403 transitions. [2021-03-10 21:28:48,465 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.5) internal successors, (42), 27 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:48,465 INFO L276 IsEmpty]: Start isEmpty. Operand 34499 states and 103403 transitions. [2021-03-10 21:28:48,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:28:48,495 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:48,495 INFO L519 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:48,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 395 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19117 [2021-03-10 21:28:48,695 INFO L428 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:48,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:48,696 INFO L82 PathProgramCache]: Analyzing trace with hash -569566705, now seen corresponding path program 394 times [2021-03-10 21:28:48,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:48,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221698765] [2021-03-10 21:28:48,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:48,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:48,831 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 45 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:48,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221698765] [2021-03-10 21:28:48,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992530074] [2021-03-10 21:28:48,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:48,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:28:48,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:48,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:28:48,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:48,917 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 55 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:48,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:48,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-03-10 21:28:48,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559592564] [2021-03-10 21:28:48,917 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:28:48,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:48,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:28:48,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:28:48,917 INFO L87 Difference]: Start difference. First operand 34499 states and 103403 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:49,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:49,266 INFO L93 Difference]: Finished difference Result 34720 states and 103729 transitions. [2021-03-10 21:28:49,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:28:49,267 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:28:49,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:49,312 INFO L225 Difference]: With dead ends: 34720 [2021-03-10 21:28:49,312 INFO L226 Difference]: Without dead ends: 34720 [2021-03-10 21:28:49,312 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 278.9ms TimeCoverageRelationStatistics Valid=412, Invalid=848, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:28:49,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34720 states. [2021-03-10 21:28:49,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34720 to 34459. [2021-03-10 21:28:49,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34459 states, 34458 states have (on average 2.9970398746299844) internal successors, (103272), 34458 states have internal predecessors, (103272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:50,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34459 states to 34459 states and 103272 transitions. [2021-03-10 21:28:50,068 INFO L78 Accepts]: Start accepts. Automaton has 34459 states and 103272 transitions. Word has length 25 [2021-03-10 21:28:50,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:50,068 INFO L480 AbstractCegarLoop]: Abstraction has 34459 states and 103272 transitions. [2021-03-10 21:28:50,068 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:50,068 INFO L276 IsEmpty]: Start isEmpty. Operand 34459 states and 103272 transitions. [2021-03-10 21:28:50,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:28:50,102 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:50,102 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:50,302 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 396 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21787 [2021-03-10 21:28:50,303 INFO L428 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:50,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:50,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1490602554, now seen corresponding path program 395 times [2021-03-10 21:28:50,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:50,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304416304] [2021-03-10 21:28:50,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:50,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:50,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304416304] [2021-03-10 21:28:50,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461232797] [2021-03-10 21:28:50,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:50,483 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:28:50,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:50,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:28:50,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:50,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:50,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-03-10 21:28:50,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541508188] [2021-03-10 21:28:50,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:28:50,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:50,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:28:50,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:28:50,549 INFO L87 Difference]: Start difference. First operand 34459 states and 103272 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:51,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:51,128 INFO L93 Difference]: Finished difference Result 35093 states and 104240 transitions. [2021-03-10 21:28:51,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 21:28:51,128 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:28:51,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:51,194 INFO L225 Difference]: With dead ends: 35093 [2021-03-10 21:28:51,194 INFO L226 Difference]: Without dead ends: 35080 [2021-03-10 21:28:51,194 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 381.0ms TimeCoverageRelationStatistics Valid=542, Invalid=1098, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:28:51,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35080 states. [2021-03-10 21:28:51,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35080 to 34497. [2021-03-10 21:28:51,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34497 states, 34496 states have (on average 2.996173469387755) internal successors, (103356), 34496 states have internal predecessors, (103356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:52,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34497 states to 34497 states and 103356 transitions. [2021-03-10 21:28:52,067 INFO L78 Accepts]: Start accepts. Automaton has 34497 states and 103356 transitions. Word has length 25 [2021-03-10 21:28:52,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:52,067 INFO L480 AbstractCegarLoop]: Abstraction has 34497 states and 103356 transitions. [2021-03-10 21:28:52,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:52,067 INFO L276 IsEmpty]: Start isEmpty. Operand 34497 states and 103356 transitions. [2021-03-10 21:28:52,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:28:52,103 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:52,103 INFO L519 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:52,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21788 [2021-03-10 21:28:52,304 INFO L428 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:52,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:52,304 INFO L82 PathProgramCache]: Analyzing trace with hash -446698831, now seen corresponding path program 396 times [2021-03-10 21:28:52,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:52,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543038267] [2021-03-10 21:28:52,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:52,405 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:52,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543038267] [2021-03-10 21:28:52,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941814427] [2021-03-10 21:28:52,406 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:52,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:28:52,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:52,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:28:52,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:52,481 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 56 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:52,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:52,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:28:52,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700287783] [2021-03-10 21:28:52,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:28:52,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:52,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:28:52,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=127, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:28:52,481 INFO L87 Difference]: Start difference. First operand 34497 states and 103356 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:52,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:52,773 INFO L93 Difference]: Finished difference Result 34544 states and 103423 transitions. [2021-03-10 21:28:52,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:28:52,773 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:28:52,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:52,832 INFO L225 Difference]: With dead ends: 34544 [2021-03-10 21:28:52,832 INFO L226 Difference]: Without dead ends: 34543 [2021-03-10 21:28:52,832 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 154.9ms TimeCoverageRelationStatistics Valid=237, Invalid=413, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:28:52,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34543 states. [2021-03-10 21:28:53,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34543 to 34497. [2021-03-10 21:28:53,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34497 states, 34496 states have (on average 2.996115491651206) internal successors, (103354), 34496 states have internal predecessors, (103354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:53,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34497 states to 34497 states and 103354 transitions. [2021-03-10 21:28:53,485 INFO L78 Accepts]: Start accepts. Automaton has 34497 states and 103354 transitions. Word has length 25 [2021-03-10 21:28:53,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:53,485 INFO L480 AbstractCegarLoop]: Abstraction has 34497 states and 103354 transitions. [2021-03-10 21:28:53,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:53,485 INFO L276 IsEmpty]: Start isEmpty. Operand 34497 states and 103354 transitions. [2021-03-10 21:28:53,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:28:53,514 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:53,514 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:53,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21789,398 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:53,714 INFO L428 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:53,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:53,715 INFO L82 PathProgramCache]: Analyzing trace with hash 470357522, now seen corresponding path program 397 times [2021-03-10 21:28:53,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:53,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218241455] [2021-03-10 21:28:53,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:53,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:53,805 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:53,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218241455] [2021-03-10 21:28:53,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633091051] [2021-03-10 21:28:53,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:53,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:53,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:28:53,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:53,887 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:53,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:53,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:28:53,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217780245] [2021-03-10 21:28:53,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:28:53,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:53,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:28:53,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:28:53,888 INFO L87 Difference]: Start difference. First operand 34497 states and 103354 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:54,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:54,206 INFO L93 Difference]: Finished difference Result 35864 states and 106497 transitions. [2021-03-10 21:28:54,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:28:54,206 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:28:54,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:54,254 INFO L225 Difference]: With dead ends: 35864 [2021-03-10 21:28:54,254 INFO L226 Difference]: Without dead ends: 35864 [2021-03-10 21:28:54,254 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 90.7ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:28:54,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35864 states. [2021-03-10 21:28:54,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35864 to 34468. [2021-03-10 21:28:54,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34468 states, 34467 states have (on average 2.9955029448457946) internal successors, (103246), 34467 states have internal predecessors, (103246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:54,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34468 states to 34468 states and 103246 transitions. [2021-03-10 21:28:54,916 INFO L78 Accepts]: Start accepts. Automaton has 34468 states and 103246 transitions. Word has length 25 [2021-03-10 21:28:54,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:54,916 INFO L480 AbstractCegarLoop]: Abstraction has 34468 states and 103246 transitions. [2021-03-10 21:28:54,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:54,916 INFO L276 IsEmpty]: Start isEmpty. Operand 34468 states and 103246 transitions. [2021-03-10 21:28:55,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:28:55,067 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:55,067 INFO L519 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:55,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21790,399 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:55,288 INFO L428 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:55,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:55,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1195948281, now seen corresponding path program 398 times [2021-03-10 21:28:55,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:55,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201859544] [2021-03-10 21:28:55,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:55,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:55,376 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 29 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:55,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201859544] [2021-03-10 21:28:55,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693073939] [2021-03-10 21:28:55,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:55,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:28:55,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:55,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:28:55,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:55,455 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 37 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:28:55,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:55,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:28:55,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796121518] [2021-03-10 21:28:55,456 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:28:55,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:55,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:28:55,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:28:55,456 INFO L87 Difference]: Start difference. First operand 34468 states and 103246 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:55,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:55,741 INFO L93 Difference]: Finished difference Result 34958 states and 104173 transitions. [2021-03-10 21:28:55,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:28:55,741 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:28:55,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:55,799 INFO L225 Difference]: With dead ends: 34958 [2021-03-10 21:28:55,799 INFO L226 Difference]: Without dead ends: 34958 [2021-03-10 21:28:55,799 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 149.5ms TimeCoverageRelationStatistics Valid=210, Invalid=342, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:28:55,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34958 states. [2021-03-10 21:28:56,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34958 to 34515. [2021-03-10 21:28:56,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34515 states, 34514 states have (on average 2.995624963782813) internal successors, (103391), 34514 states have internal predecessors, (103391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:56,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34515 states to 34515 states and 103391 transitions. [2021-03-10 21:28:56,517 INFO L78 Accepts]: Start accepts. Automaton has 34515 states and 103391 transitions. Word has length 25 [2021-03-10 21:28:56,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:56,517 INFO L480 AbstractCegarLoop]: Abstraction has 34515 states and 103391 transitions. [2021-03-10 21:28:56,518 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:56,518 INFO L276 IsEmpty]: Start isEmpty. Operand 34515 states and 103391 transitions. [2021-03-10 21:28:56,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:28:56,551 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:56,551 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:56,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21791,400 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:56,751 INFO L428 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:56,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:56,751 INFO L82 PathProgramCache]: Analyzing trace with hash -251186298, now seen corresponding path program 399 times [2021-03-10 21:28:56,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:56,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131841746] [2021-03-10 21:28:56,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:56,833 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:56,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131841746] [2021-03-10 21:28:56,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682323102] [2021-03-10 21:28:56,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:56,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:28:56,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:56,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:28:56,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:56,908 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:28:56,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:56,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:28:56,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448555895] [2021-03-10 21:28:56,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:28:56,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:56,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:28:56,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:28:56,909 INFO L87 Difference]: Start difference. First operand 34515 states and 103391 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:57,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:57,191 INFO L93 Difference]: Finished difference Result 35079 states and 104228 transitions. [2021-03-10 21:28:57,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:28:57,192 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:28:57,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:57,247 INFO L225 Difference]: With dead ends: 35079 [2021-03-10 21:28:57,247 INFO L226 Difference]: Without dead ends: 35077 [2021-03-10 21:28:57,247 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 162.5ms TimeCoverageRelationStatistics Valid=246, Invalid=404, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:28:57,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35077 states. [2021-03-10 21:28:57,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35077 to 34527. [2021-03-10 21:28:57,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34527 states, 34526 states have (on average 2.9958292301453975) internal successors, (103434), 34526 states have internal predecessors, (103434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:58,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34527 states to 34527 states and 103434 transitions. [2021-03-10 21:28:58,108 INFO L78 Accepts]: Start accepts. Automaton has 34527 states and 103434 transitions. Word has length 25 [2021-03-10 21:28:58,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:58,108 INFO L480 AbstractCegarLoop]: Abstraction has 34527 states and 103434 transitions. [2021-03-10 21:28:58,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:58,108 INFO L276 IsEmpty]: Start isEmpty. Operand 34527 states and 103434 transitions. [2021-03-10 21:28:58,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:28:58,138 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:58,138 INFO L519 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:58,339 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21792,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:58,339 INFO L428 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:58,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:58,339 INFO L82 PathProgramCache]: Analyzing trace with hash 549506409, now seen corresponding path program 400 times [2021-03-10 21:28:58,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:58,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944396514] [2021-03-10 21:28:58,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:58,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:58,422 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 39 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:58,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944396514] [2021-03-10 21:28:58,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395948206] [2021-03-10 21:28:58,422 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:58,442 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:28:58,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:58,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:28:58,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:58,494 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 47 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:58,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:58,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:28:58,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243602158] [2021-03-10 21:28:58,494 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:28:58,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:58,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:28:58,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:28:58,495 INFO L87 Difference]: Start difference. First operand 34527 states and 103434 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:58,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:28:58,814 INFO L93 Difference]: Finished difference Result 34780 states and 103823 transitions. [2021-03-10 21:28:58,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:28:58,814 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:28:58,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:28:58,862 INFO L225 Difference]: With dead ends: 34780 [2021-03-10 21:28:58,862 INFO L226 Difference]: Without dead ends: 34778 [2021-03-10 21:28:58,863 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 151.7ms TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:28:58,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34778 states. [2021-03-10 21:28:59,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34778 to 34497. [2021-03-10 21:28:59,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34497 states, 34496 states have (on average 2.9955936920222634) internal successors, (103336), 34496 states have internal predecessors, (103336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:59,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34497 states to 34497 states and 103336 transitions. [2021-03-10 21:28:59,475 INFO L78 Accepts]: Start accepts. Automaton has 34497 states and 103336 transitions. Word has length 25 [2021-03-10 21:28:59,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:28:59,475 INFO L480 AbstractCegarLoop]: Abstraction has 34497 states and 103336 transitions. [2021-03-10 21:28:59,475 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:28:59,475 INFO L276 IsEmpty]: Start isEmpty. Operand 34497 states and 103336 transitions. [2021-03-10 21:28:59,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:28:59,508 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:28:59,508 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:28:59,708 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21793 [2021-03-10 21:28:59,709 INFO L428 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:28:59,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:28:59,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1466562762, now seen corresponding path program 401 times [2021-03-10 21:28:59,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:28:59,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598288554] [2021-03-10 21:28:59,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:28:59,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:28:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:59,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598288554] [2021-03-10 21:28:59,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368994707] [2021-03-10 21:28:59,791 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:28:59,812 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:28:59,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:28:59,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:28:59,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:28:59,990 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:28:59,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:28:59,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:28:59,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711265154] [2021-03-10 21:28:59,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:28:59,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:28:59,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:28:59,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:28:59,990 INFO L87 Difference]: Start difference. First operand 34497 states and 103336 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:00,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:00,171 INFO L93 Difference]: Finished difference Result 35545 states and 105444 transitions. [2021-03-10 21:29:00,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:29:00,172 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:00,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:00,228 INFO L225 Difference]: With dead ends: 35545 [2021-03-10 21:29:00,228 INFO L226 Difference]: Without dead ends: 35545 [2021-03-10 21:29:00,229 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 81.7ms TimeCoverageRelationStatistics Valid=106, Invalid=134, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:00,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35545 states. [2021-03-10 21:29:00,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35545 to 34502. [2021-03-10 21:29:00,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34502 states, 34501 states have (on average 2.995536361264891) internal successors, (103349), 34501 states have internal predecessors, (103349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:00,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34502 states to 34502 states and 103349 transitions. [2021-03-10 21:29:00,898 INFO L78 Accepts]: Start accepts. Automaton has 34502 states and 103349 transitions. Word has length 25 [2021-03-10 21:29:00,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:00,899 INFO L480 AbstractCegarLoop]: Abstraction has 34502 states and 103349 transitions. [2021-03-10 21:29:00,899 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:00,899 INFO L276 IsEmpty]: Start isEmpty. Operand 34502 states and 103349 transitions. [2021-03-10 21:29:00,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:00,935 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:00,935 INFO L519 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:01,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 403 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21794 [2021-03-10 21:29:01,135 INFO L428 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:01,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:01,136 INFO L82 PathProgramCache]: Analyzing trace with hash -2034847579, now seen corresponding path program 402 times [2021-03-10 21:29:01,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:01,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376351587] [2021-03-10 21:29:01,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:01,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:01,227 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 40 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:01,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376351587] [2021-03-10 21:29:01,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100617142] [2021-03-10 21:29:01,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:01,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:29:01,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:01,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:29:01,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:01,312 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 48 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:01,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:01,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:29:01,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751500695] [2021-03-10 21:29:01,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:29:01,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:01,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:29:01,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:01,313 INFO L87 Difference]: Start difference. First operand 34502 states and 103349 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:01,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:01,743 INFO L93 Difference]: Finished difference Result 34731 states and 103707 transitions. [2021-03-10 21:29:01,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:29:01,744 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:01,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:01,802 INFO L225 Difference]: With dead ends: 34731 [2021-03-10 21:29:01,802 INFO L226 Difference]: Without dead ends: 34729 [2021-03-10 21:29:01,803 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 182.1ms TimeCoverageRelationStatistics Valid=267, Invalid=489, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:29:01,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34729 states. [2021-03-10 21:29:02,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34729 to 34502. [2021-03-10 21:29:02,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34502 states, 34501 states have (on average 2.9954783919306687) internal successors, (103347), 34501 states have internal predecessors, (103347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:02,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34502 states to 34502 states and 103347 transitions. [2021-03-10 21:29:02,428 INFO L78 Accepts]: Start accepts. Automaton has 34502 states and 103347 transitions. Word has length 25 [2021-03-10 21:29:02,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:02,428 INFO L480 AbstractCegarLoop]: Abstraction has 34502 states and 103347 transitions. [2021-03-10 21:29:02,428 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:02,428 INFO L276 IsEmpty]: Start isEmpty. Operand 34502 states and 103347 transitions. [2021-03-10 21:29:02,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:02,462 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:02,462 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:02,662 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21795 [2021-03-10 21:29:02,662 INFO L428 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:02,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:02,662 INFO L82 PathProgramCache]: Analyzing trace with hash -262484572, now seen corresponding path program 403 times [2021-03-10 21:29:02,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:02,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331573551] [2021-03-10 21:29:02,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:02,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331573551] [2021-03-10 21:29:02,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801278389] [2021-03-10 21:29:02,928 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:02,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:02,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:29:02,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:03,013 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:03,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:03,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:29:03,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831933910] [2021-03-10 21:29:03,013 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:29:03,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:03,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:29:03,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:03,014 INFO L87 Difference]: Start difference. First operand 34502 states and 103347 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:03,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:03,234 INFO L93 Difference]: Finished difference Result 37216 states and 110229 transitions. [2021-03-10 21:29:03,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:29:03,235 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:03,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:03,298 INFO L225 Difference]: With dead ends: 37216 [2021-03-10 21:29:03,298 INFO L226 Difference]: Without dead ends: 37216 [2021-03-10 21:29:03,298 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 284.3ms TimeCoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:29:03,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37216 states. [2021-03-10 21:29:03,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37216 to 34471. [2021-03-10 21:29:03,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34471 states, 34470 states have (on average 2.9948651000870323) internal successors, (103233), 34470 states have internal predecessors, (103233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:03,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34471 states to 34471 states and 103233 transitions. [2021-03-10 21:29:03,935 INFO L78 Accepts]: Start accepts. Automaton has 34471 states and 103233 transitions. Word has length 25 [2021-03-10 21:29:03,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:03,935 INFO L480 AbstractCegarLoop]: Abstraction has 34471 states and 103233 transitions. [2021-03-10 21:29:03,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:03,935 INFO L276 IsEmpty]: Start isEmpty. Operand 34471 states and 103233 transitions. [2021-03-10 21:29:03,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:03,969 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:03,970 INFO L519 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:04,170 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21796 [2021-03-10 21:29:04,170 INFO L428 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:04,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:04,170 INFO L82 PathProgramCache]: Analyzing trace with hash -378356913, now seen corresponding path program 404 times [2021-03-10 21:29:04,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:04,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772869428] [2021-03-10 21:29:04,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:04,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:04,247 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 24 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:04,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772869428] [2021-03-10 21:29:04,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187634243] [2021-03-10 21:29:04,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:04,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:04,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:04,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:29:04,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:04,326 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 31 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:04,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:04,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:29:04,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064085300] [2021-03-10 21:29:04,326 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:29:04,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:04,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:29:04,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:04,326 INFO L87 Difference]: Start difference. First operand 34471 states and 103233 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:04,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:04,578 INFO L93 Difference]: Finished difference Result 35061 states and 104338 transitions. [2021-03-10 21:29:04,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:29:04,579 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:04,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:04,636 INFO L225 Difference]: With dead ends: 35061 [2021-03-10 21:29:04,636 INFO L226 Difference]: Without dead ends: 35061 [2021-03-10 21:29:04,636 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 126.9ms TimeCoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:29:04,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35061 states. [2021-03-10 21:29:05,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35061 to 34496. [2021-03-10 21:29:05,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34496 states, 34495 states have (on average 2.9951007392375706) internal successors, (103316), 34495 states have internal predecessors, (103316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:05,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34496 states to 34496 states and 103316 transitions. [2021-03-10 21:29:05,380 INFO L78 Accepts]: Start accepts. Automaton has 34496 states and 103316 transitions. Word has length 25 [2021-03-10 21:29:05,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:05,380 INFO L480 AbstractCegarLoop]: Abstraction has 34496 states and 103316 transitions. [2021-03-10 21:29:05,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:05,380 INFO L276 IsEmpty]: Start isEmpty. Operand 34496 states and 103316 transitions. [2021-03-10 21:29:05,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:05,415 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:05,415 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:05,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21797 [2021-03-10 21:29:05,616 INFO L428 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:05,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:05,616 INFO L82 PathProgramCache]: Analyzing trace with hash 566405070, now seen corresponding path program 405 times [2021-03-10 21:29:05,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:05,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594458235] [2021-03-10 21:29:05,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:05,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:05,699 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 37 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:05,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594458235] [2021-03-10 21:29:05,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432652774] [2021-03-10 21:29:05,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:05,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:29:05,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:05,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:29:05,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:05,802 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:05,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:05,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:29:05,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216020437] [2021-03-10 21:29:05,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:29:05,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:05,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:29:05,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:05,803 INFO L87 Difference]: Start difference. First operand 34496 states and 103316 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:06,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:06,238 INFO L93 Difference]: Finished difference Result 35075 states and 104177 transitions. [2021-03-10 21:29:06,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:29:06,239 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:06,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:06,294 INFO L225 Difference]: With dead ends: 35075 [2021-03-10 21:29:06,294 INFO L226 Difference]: Without dead ends: 35073 [2021-03-10 21:29:06,294 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 165.3ms TimeCoverageRelationStatistics Valid=245, Invalid=405, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:29:06,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35073 states. [2021-03-10 21:29:06,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35073 to 34510. [2021-03-10 21:29:06,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34510 states, 34509 states have (on average 2.995276594511577) internal successors, (103364), 34509 states have internal predecessors, (103364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:07,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34510 states to 34510 states and 103364 transitions. [2021-03-10 21:29:07,006 INFO L78 Accepts]: Start accepts. Automaton has 34510 states and 103364 transitions. Word has length 25 [2021-03-10 21:29:07,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:07,006 INFO L480 AbstractCegarLoop]: Abstraction has 34510 states and 103364 transitions. [2021-03-10 21:29:07,006 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:07,006 INFO L276 IsEmpty]: Start isEmpty. Operand 34510 states and 103364 transitions. [2021-03-10 21:29:07,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:07,038 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:07,038 INFO L519 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:07,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21798 [2021-03-10 21:29:07,239 INFO L428 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:07,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:07,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1367097777, now seen corresponding path program 406 times [2021-03-10 21:29:07,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:07,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593345071] [2021-03-10 21:29:07,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:07,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:07,316 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 33 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:07,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593345071] [2021-03-10 21:29:07,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007409886] [2021-03-10 21:29:07,316 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:07,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:07,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:07,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:29:07,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:07,388 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 40 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:07,388 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:07,388 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:29:07,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875540263] [2021-03-10 21:29:07,388 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:29:07,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:07,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:29:07,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:07,388 INFO L87 Difference]: Start difference. First operand 34510 states and 103364 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:07,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:07,717 INFO L93 Difference]: Finished difference Result 34813 states and 103831 transitions. [2021-03-10 21:29:07,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:29:07,717 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:07,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:07,768 INFO L225 Difference]: With dead ends: 34813 [2021-03-10 21:29:07,769 INFO L226 Difference]: Without dead ends: 34811 [2021-03-10 21:29:07,769 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 140.0ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:29:07,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34811 states. [2021-03-10 21:29:08,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34811 to 34480. [2021-03-10 21:29:08,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34480 states, 34479 states have (on average 2.9950694625714203) internal successors, (103267), 34479 states have internal predecessors, (103267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:08,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34480 states to 34480 states and 103267 transitions. [2021-03-10 21:29:08,438 INFO L78 Accepts]: Start accepts. Automaton has 34480 states and 103267 transitions. Word has length 25 [2021-03-10 21:29:08,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:08,438 INFO L480 AbstractCegarLoop]: Abstraction has 34480 states and 103267 transitions. [2021-03-10 21:29:08,438 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:08,438 INFO L276 IsEmpty]: Start isEmpty. Operand 34480 states and 103267 transitions. [2021-03-10 21:29:08,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:08,471 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:08,471 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:08,671 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21799,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:08,671 INFO L428 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:08,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:08,671 INFO L82 PathProgramCache]: Analyzing trace with hash -2010813166, now seen corresponding path program 407 times [2021-03-10 21:29:08,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:08,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670289126] [2021-03-10 21:29:08,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:08,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:08,747 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:08,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670289126] [2021-03-10 21:29:08,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122971810] [2021-03-10 21:29:08,747 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:08,769 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:29:08,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:08,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:29:08,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:08,826 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 36 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:08,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:08,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:29:08,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426329719] [2021-03-10 21:29:08,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:29:08,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:08,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:29:08,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=119, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:08,827 INFO L87 Difference]: Start difference. First operand 34480 states and 103267 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:09,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:09,002 INFO L93 Difference]: Finished difference Result 35049 states and 104051 transitions. [2021-03-10 21:29:09,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:29:09,003 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:09,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:09,056 INFO L225 Difference]: With dead ends: 35049 [2021-03-10 21:29:09,056 INFO L226 Difference]: Without dead ends: 35049 [2021-03-10 21:29:09,056 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 74.7ms TimeCoverageRelationStatistics Valid=105, Invalid=135, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:09,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35049 states. [2021-03-10 21:29:09,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35049 to 34468. [2021-03-10 21:29:09,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34468 states, 34467 states have (on average 2.994574520555894) internal successors, (103214), 34467 states have internal predecessors, (103214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:09,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34468 states to 34468 states and 103214 transitions. [2021-03-10 21:29:09,780 INFO L78 Accepts]: Start accepts. Automaton has 34468 states and 103214 transitions. Word has length 25 [2021-03-10 21:29:09,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:09,780 INFO L480 AbstractCegarLoop]: Abstraction has 34468 states and 103214 transitions. [2021-03-10 21:29:09,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:09,780 INFO L276 IsEmpty]: Start isEmpty. Operand 34468 states and 103214 transitions. [2021-03-10 21:29:09,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:09,815 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:09,815 INFO L519 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:10,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21800,409 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:10,015 INFO L428 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:10,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:10,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1217256211, now seen corresponding path program 408 times [2021-03-10 21:29:10,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:10,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931968243] [2021-03-10 21:29:10,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:10,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:10,110 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 33 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:10,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931968243] [2021-03-10 21:29:10,110 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607841400] [2021-03-10 21:29:10,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:10,134 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:29:10,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:10,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:29:10,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:10,194 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 40 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:10,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:10,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:29:10,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717868257] [2021-03-10 21:29:10,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:29:10,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:10,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:29:10,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:10,195 INFO L87 Difference]: Start difference. First operand 34468 states and 103214 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:10,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:10,565 INFO L93 Difference]: Finished difference Result 34766 states and 103678 transitions. [2021-03-10 21:29:10,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:29:10,566 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:10,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:10,628 INFO L225 Difference]: With dead ends: 34766 [2021-03-10 21:29:10,628 INFO L226 Difference]: Without dead ends: 34764 [2021-03-10 21:29:10,628 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=268, Invalid=488, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:29:10,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34764 states. [2021-03-10 21:29:11,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34764 to 34468. [2021-03-10 21:29:11,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34468 states, 34467 states have (on average 2.994516494037775) internal successors, (103212), 34467 states have internal predecessors, (103212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:11,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34468 states to 34468 states and 103212 transitions. [2021-03-10 21:29:11,292 INFO L78 Accepts]: Start accepts. Automaton has 34468 states and 103212 transitions. Word has length 25 [2021-03-10 21:29:11,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:11,292 INFO L480 AbstractCegarLoop]: Abstraction has 34468 states and 103212 transitions. [2021-03-10 21:29:11,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:11,292 INFO L276 IsEmpty]: Start isEmpty. Operand 34468 states and 103212 transitions. [2021-03-10 21:29:11,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:11,326 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:11,326 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:11,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21801,410 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:11,526 INFO L428 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:11,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:11,526 INFO L82 PathProgramCache]: Analyzing trace with hash 555106796, now seen corresponding path program 409 times [2021-03-10 21:29:11,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:11,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688413109] [2021-03-10 21:29:11,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:11,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:11,612 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:11,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688413109] [2021-03-10 21:29:11,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247742355] [2021-03-10 21:29:11,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:11,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:11,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:29:11,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:11,693 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:11,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:11,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:29:11,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252346931] [2021-03-10 21:29:11,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:29:11,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:11,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:29:11,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:11,694 INFO L87 Difference]: Start difference. First operand 34468 states and 103212 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:12,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:12,115 INFO L93 Difference]: Finished difference Result 36516 states and 108167 transitions. [2021-03-10 21:29:12,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:29:12,116 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:12,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:12,175 INFO L225 Difference]: With dead ends: 36516 [2021-03-10 21:29:12,175 INFO L226 Difference]: Without dead ends: 36516 [2021-03-10 21:29:12,175 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 97.4ms TimeCoverageRelationStatistics Valid=139, Invalid=203, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:29:12,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36516 states. [2021-03-10 21:29:12,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36516 to 34482. [2021-03-10 21:29:12,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34482 states, 34481 states have (on average 2.9944607174965925) internal successors, (103252), 34481 states have internal predecessors, (103252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:12,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34482 states to 34482 states and 103252 transitions. [2021-03-10 21:29:12,704 INFO L78 Accepts]: Start accepts. Automaton has 34482 states and 103252 transitions. Word has length 25 [2021-03-10 21:29:12,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:12,704 INFO L480 AbstractCegarLoop]: Abstraction has 34482 states and 103252 transitions. [2021-03-10 21:29:12,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:12,704 INFO L276 IsEmpty]: Start isEmpty. Operand 34482 states and 103252 transitions. [2021-03-10 21:29:12,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:12,737 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:12,737 INFO L519 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:12,937 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21802,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:12,938 INFO L428 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:12,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:12,938 INFO L82 PathProgramCache]: Analyzing trace with hash 272148785, now seen corresponding path program 410 times [2021-03-10 21:29:12,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:12,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227675922] [2021-03-10 21:29:12,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:13,030 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:13,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227675922] [2021-03-10 21:29:13,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799432355] [2021-03-10 21:29:13,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:13,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:13,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:13,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:29:13,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:13,273 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 42 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:13,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:13,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:29:13,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550904222] [2021-03-10 21:29:13,274 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:29:13,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:13,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:29:13,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:13,274 INFO L87 Difference]: Start difference. First operand 34482 states and 103252 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:13,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:13,546 INFO L93 Difference]: Finished difference Result 34881 states and 104144 transitions. [2021-03-10 21:29:13,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:29:13,546 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:13,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:13,600 INFO L225 Difference]: With dead ends: 34881 [2021-03-10 21:29:13,600 INFO L226 Difference]: Without dead ends: 34878 [2021-03-10 21:29:13,600 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 162.7ms TimeCoverageRelationStatistics Valid=259, Invalid=497, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:29:13,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34878 states. [2021-03-10 21:29:14,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34878 to 34485. [2021-03-10 21:29:14,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34485 states, 34484 states have (on average 2.9944032014847464) internal successors, (103259), 34484 states have internal predecessors, (103259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:14,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34485 states to 34485 states and 103259 transitions. [2021-03-10 21:29:14,315 INFO L78 Accepts]: Start accepts. Automaton has 34485 states and 103259 transitions. Word has length 25 [2021-03-10 21:29:14,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:14,315 INFO L480 AbstractCegarLoop]: Abstraction has 34485 states and 103259 transitions. [2021-03-10 21:29:14,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:14,315 INFO L276 IsEmpty]: Start isEmpty. Operand 34485 states and 103259 transitions. [2021-03-10 21:29:14,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:14,348 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:14,348 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:14,548 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21803 [2021-03-10 21:29:14,549 INFO L428 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:14,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:14,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1505753006, now seen corresponding path program 411 times [2021-03-10 21:29:14,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:14,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046270480] [2021-03-10 21:29:14,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:14,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:14,648 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:14,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046270480] [2021-03-10 21:29:14,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764279335] [2021-03-10 21:29:14,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:14,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:29:14,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:14,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:29:14,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:14,741 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:14,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:14,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:29:14,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855877100] [2021-03-10 21:29:14,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:29:14,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:14,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:29:14,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:14,742 INFO L87 Difference]: Start difference. First operand 34485 states and 103259 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:15,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:15,032 INFO L93 Difference]: Finished difference Result 46521 states and 138645 transitions. [2021-03-10 21:29:15,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:29:15,033 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:15,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:15,118 INFO L225 Difference]: With dead ends: 46521 [2021-03-10 21:29:15,118 INFO L226 Difference]: Without dead ends: 46521 [2021-03-10 21:29:15,118 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 135.8ms TimeCoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:29:15,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46521 states. [2021-03-10 21:29:16,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46521 to 44002. [2021-03-10 21:29:16,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44002 states, 44001 states have (on average 3.0104088543442193) internal successors, (132461), 44001 states have internal predecessors, (132461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:16,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44002 states to 44002 states and 132461 transitions. [2021-03-10 21:29:16,149 INFO L78 Accepts]: Start accepts. Automaton has 44002 states and 132461 transitions. Word has length 25 [2021-03-10 21:29:16,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:16,149 INFO L480 AbstractCegarLoop]: Abstraction has 44002 states and 132461 transitions. [2021-03-10 21:29:16,149 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:16,149 INFO L276 IsEmpty]: Start isEmpty. Operand 44002 states and 132461 transitions. [2021-03-10 21:29:16,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:16,190 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:16,190 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:16,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21804,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:16,390 INFO L428 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:16,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:16,391 INFO L82 PathProgramCache]: Analyzing trace with hash 460670884, now seen corresponding path program 412 times [2021-03-10 21:29:16,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:16,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31348064] [2021-03-10 21:29:16,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:16,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:16,463 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:29:16,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31348064] [2021-03-10 21:29:16,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144711410] [2021-03-10 21:29:16,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:16,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:16,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:16,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:29:16,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:16,537 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:29:16,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:16,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:29:16,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50828337] [2021-03-10 21:29:16,537 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:29:16,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:16,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:29:16,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:29:16,537 INFO L87 Difference]: Start difference. First operand 44002 states and 132461 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:16,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:16,883 INFO L93 Difference]: Finished difference Result 44568 states and 133377 transitions. [2021-03-10 21:29:16,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:29:16,883 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:16,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:16,944 INFO L225 Difference]: With dead ends: 44568 [2021-03-10 21:29:16,944 INFO L226 Difference]: Without dead ends: 44564 [2021-03-10 21:29:16,944 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 147.8ms TimeCoverageRelationStatistics Valid=214, Invalid=386, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:29:16,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44564 states. [2021-03-10 21:29:17,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44564 to 44065. [2021-03-10 21:29:17,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44065 states, 44064 states have (on average 3.0110748002904866) internal successors, (132680), 44064 states have internal predecessors, (132680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:17,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44065 states to 44065 states and 132680 transitions. [2021-03-10 21:29:17,796 INFO L78 Accepts]: Start accepts. Automaton has 44065 states and 132680 transitions. Word has length 25 [2021-03-10 21:29:17,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:17,796 INFO L480 AbstractCegarLoop]: Abstraction has 44065 states and 132680 transitions. [2021-03-10 21:29:17,796 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:17,796 INFO L276 IsEmpty]: Start isEmpty. Operand 44065 states and 132680 transitions. [2021-03-10 21:29:17,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:17,831 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:17,831 INFO L519 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:18,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21805,414 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:18,031 INFO L428 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:18,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:18,031 INFO L82 PathProgramCache]: Analyzing trace with hash 354023683, now seen corresponding path program 413 times [2021-03-10 21:29:18,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:18,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946251103] [2021-03-10 21:29:18,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:18,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:18,132 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 29 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:18,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946251103] [2021-03-10 21:29:18,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260229089] [2021-03-10 21:29:18,133 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:18,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 21:29:18,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:18,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:29:18,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:18,207 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:18,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:18,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:29:18,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33655302] [2021-03-10 21:29:18,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:29:18,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:18,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:29:18,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:18,208 INFO L87 Difference]: Start difference. First operand 44065 states and 132680 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:18,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:18,693 INFO L93 Difference]: Finished difference Result 44288 states and 133062 transitions. [2021-03-10 21:29:18,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:29:18,694 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:18,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:18,772 INFO L225 Difference]: With dead ends: 44288 [2021-03-10 21:29:18,772 INFO L226 Difference]: Without dead ends: 44282 [2021-03-10 21:29:18,772 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 318.3ms TimeCoverageRelationStatistics Valid=260, Invalid=496, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:29:18,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44282 states. [2021-03-10 21:29:19,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44282 to 44054. [2021-03-10 21:29:19,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44054 states, 44053 states have (on average 3.0111683653780674) internal successors, (132651), 44053 states have internal predecessors, (132651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:19,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44054 states to 44054 states and 132651 transitions. [2021-03-10 21:29:19,666 INFO L78 Accepts]: Start accepts. Automaton has 44054 states and 132651 transitions. Word has length 25 [2021-03-10 21:29:19,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:19,666 INFO L480 AbstractCegarLoop]: Abstraction has 44054 states and 132651 transitions. [2021-03-10 21:29:19,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:19,666 INFO L276 IsEmpty]: Start isEmpty. Operand 44054 states and 132651 transitions. [2021-03-10 21:29:19,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:19,710 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:19,710 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:19,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21806,415 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:19,911 INFO L428 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:19,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:19,911 INFO L82 PathProgramCache]: Analyzing trace with hash -1423878108, now seen corresponding path program 414 times [2021-03-10 21:29:19,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:19,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105346627] [2021-03-10 21:29:19,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:19,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:20,002 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:20,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105346627] [2021-03-10 21:29:20,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1818038793] [2021-03-10 21:29:20,002 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:20,025 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:29:20,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:20,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:29:20,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:20,089 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:20,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:20,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:29:20,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156337574] [2021-03-10 21:29:20,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:29:20,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:20,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:29:20,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:20,090 INFO L87 Difference]: Start difference. First operand 44054 states and 132651 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:20,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:20,361 INFO L93 Difference]: Finished difference Result 48810 states and 145573 transitions. [2021-03-10 21:29:20,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:29:20,362 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:20,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:20,445 INFO L225 Difference]: With dead ends: 48810 [2021-03-10 21:29:20,445 INFO L226 Difference]: Without dead ends: 48810 [2021-03-10 21:29:20,445 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 125.5ms TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:29:20,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48810 states. [2021-03-10 21:29:21,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48810 to 34578. [2021-03-10 21:29:21,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34578 states, 34577 states have (on average 2.9973971136882898) internal successors, (103641), 34577 states have internal predecessors, (103641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:21,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34578 states to 34578 states and 103641 transitions. [2021-03-10 21:29:21,368 INFO L78 Accepts]: Start accepts. Automaton has 34578 states and 103641 transitions. Word has length 25 [2021-03-10 21:29:21,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:21,368 INFO L480 AbstractCegarLoop]: Abstraction has 34578 states and 103641 transitions. [2021-03-10 21:29:21,368 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:21,368 INFO L276 IsEmpty]: Start isEmpty. Operand 34578 states and 103641 transitions. [2021-03-10 21:29:21,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:21,401 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:21,401 INFO L519 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:21,602 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21807,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:21,602 INFO L428 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:21,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:21,602 INFO L82 PathProgramCache]: Analyzing trace with hash -802828281, now seen corresponding path program 415 times [2021-03-10 21:29:21,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:21,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713051267] [2021-03-10 21:29:21,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:21,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:21,678 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 21 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:21,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713051267] [2021-03-10 21:29:21,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32958866] [2021-03-10 21:29:21,678 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:21,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:21,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:29:21,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:21,761 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 27 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:21,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:21,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:29:21,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563097055] [2021-03-10 21:29:21,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:29:21,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:21,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:29:21,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:21,761 INFO L87 Difference]: Start difference. First operand 34578 states and 103641 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:22,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:22,019 INFO L93 Difference]: Finished difference Result 35262 states and 104945 transitions. [2021-03-10 21:29:22,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:29:22,020 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:22,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:22,072 INFO L225 Difference]: With dead ends: 35262 [2021-03-10 21:29:22,072 INFO L226 Difference]: Without dead ends: 35262 [2021-03-10 21:29:22,072 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 119.8ms TimeCoverageRelationStatistics Valid=184, Invalid=278, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:29:22,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35262 states. [2021-03-10 21:29:22,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35262 to 34634. [2021-03-10 21:29:22,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34634 states, 34633 states have (on average 2.997574567608928) internal successors, (103815), 34633 states have internal predecessors, (103815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:22,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34634 states to 34634 states and 103815 transitions. [2021-03-10 21:29:22,778 INFO L78 Accepts]: Start accepts. Automaton has 34634 states and 103815 transitions. Word has length 25 [2021-03-10 21:29:22,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:22,778 INFO L480 AbstractCegarLoop]: Abstraction has 34634 states and 103815 transitions. [2021-03-10 21:29:22,778 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:22,778 INFO L276 IsEmpty]: Start isEmpty. Operand 34634 states and 103815 transitions. [2021-03-10 21:29:22,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:22,811 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:22,811 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:23,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21808 [2021-03-10 21:29:23,011 INFO L428 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:23,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:23,012 INFO L82 PathProgramCache]: Analyzing trace with hash 141933702, now seen corresponding path program 416 times [2021-03-10 21:29:23,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:23,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668844873] [2021-03-10 21:29:23,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:23,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:23,085 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:23,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668844873] [2021-03-10 21:29:23,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508023561] [2021-03-10 21:29:23,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:23,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:23,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:23,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:29:23,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 43 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:23,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:23,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:29:23,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110093545] [2021-03-10 21:29:23,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:29:23,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:23,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:29:23,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:23,158 INFO L87 Difference]: Start difference. First operand 34634 states and 103815 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:23,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:23,452 INFO L93 Difference]: Finished difference Result 35187 states and 104616 transitions. [2021-03-10 21:29:23,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:29:23,453 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:23,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:23,498 INFO L225 Difference]: With dead ends: 35187 [2021-03-10 21:29:23,499 INFO L226 Difference]: Without dead ends: 35183 [2021-03-10 21:29:23,499 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 150.3ms TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:29:23,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35183 states. [2021-03-10 21:29:24,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35183 to 34619. [2021-03-10 21:29:24,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34619 states, 34618 states have (on average 2.997255762897914) internal successors, (103759), 34618 states have internal predecessors, (103759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:24,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34619 states to 34619 states and 103759 transitions. [2021-03-10 21:29:24,141 INFO L78 Accepts]: Start accepts. Automaton has 34619 states and 103759 transitions. Word has length 25 [2021-03-10 21:29:24,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:24,141 INFO L480 AbstractCegarLoop]: Abstraction has 34619 states and 103759 transitions. [2021-03-10 21:29:24,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:24,141 INFO L276 IsEmpty]: Start isEmpty. Operand 34619 states and 103759 transitions. [2021-03-10 21:29:24,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:24,172 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:24,172 INFO L519 BasicCegarLoop]: trace histogram [11, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:24,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21809,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:24,372 INFO L428 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:24,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:24,372 INFO L82 PathProgramCache]: Analyzing trace with hash 942626409, now seen corresponding path program 417 times [2021-03-10 21:29:24,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:24,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594908691] [2021-03-10 21:29:24,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:24,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:24,474 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 30 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:24,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594908691] [2021-03-10 21:29:24,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836797524] [2021-03-10 21:29:24,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:24,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:29:24,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:24,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 25 conjunts are in the unsatisfiable core [2021-03-10 21:29:24,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:24,712 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-03-10 21:29:24,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:24,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 26 [2021-03-10 21:29:24,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028499083] [2021-03-10 21:29:24,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 21:29:24,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:24,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 21:29:24,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:29:24,713 INFO L87 Difference]: Start difference. First operand 34619 states and 103759 transitions. Second operand has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:26,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:26,970 INFO L93 Difference]: Finished difference Result 67922 states and 202433 transitions. [2021-03-10 21:29:26,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-03-10 21:29:26,970 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:26,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:27,109 INFO L225 Difference]: With dead ends: 67922 [2021-03-10 21:29:27,109 INFO L226 Difference]: Without dead ends: 67903 [2021-03-10 21:29:27,110 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5477 ImplicationChecksByTransitivity, 1620.7ms TimeCoverageRelationStatistics Valid=1479, Invalid=14021, Unknown=0, NotChecked=0, Total=15500 [2021-03-10 21:29:27,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67903 states. [2021-03-10 21:29:27,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67903 to 38876. [2021-03-10 21:29:27,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38876 states, 38875 states have (on average 2.9676655948553057) internal successors, (115368), 38875 states have internal predecessors, (115368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:28,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38876 states to 38876 states and 115368 transitions. [2021-03-10 21:29:28,065 INFO L78 Accepts]: Start accepts. Automaton has 38876 states and 115368 transitions. Word has length 25 [2021-03-10 21:29:28,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:28,066 INFO L480 AbstractCegarLoop]: Abstraction has 38876 states and 115368 transitions. [2021-03-10 21:29:28,066 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.5555555555555556) internal successors, (42), 26 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:28,066 INFO L276 IsEmpty]: Start isEmpty. Operand 38876 states and 115368 transitions. [2021-03-10 21:29:28,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:28,097 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:28,097 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:28,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21810 [2021-03-10 21:29:28,297 INFO L428 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:28,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:28,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1859682762, now seen corresponding path program 418 times [2021-03-10 21:29:28,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:28,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913787454] [2021-03-10 21:29:28,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:28,373 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:28,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913787454] [2021-03-10 21:29:28,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907958290] [2021-03-10 21:29:28,374 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:28,393 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:28,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:28,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:29:28,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:28,452 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 41 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:28,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:28,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:29:28,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899352162] [2021-03-10 21:29:28,452 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:29:28,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:28,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:29:28,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:28,453 INFO L87 Difference]: Start difference. First operand 38876 states and 115368 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:28,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:28,643 INFO L93 Difference]: Finished difference Result 40813 states and 119859 transitions. [2021-03-10 21:29:28,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:29:28,644 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:28,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:28,709 INFO L225 Difference]: With dead ends: 40813 [2021-03-10 21:29:28,709 INFO L226 Difference]: Without dead ends: 40813 [2021-03-10 21:29:28,709 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=118, Invalid=154, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:28,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40813 states. [2021-03-10 21:29:29,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40813 to 38877. [2021-03-10 21:29:29,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38877 states, 38876 states have (on average 2.9672291388002883) internal successors, (115354), 38876 states have internal predecessors, (115354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:29,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38877 states to 38877 states and 115354 transitions. [2021-03-10 21:29:29,495 INFO L78 Accepts]: Start accepts. Automaton has 38877 states and 115354 transitions. Word has length 25 [2021-03-10 21:29:29,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:29,495 INFO L480 AbstractCegarLoop]: Abstraction has 38877 states and 115354 transitions. [2021-03-10 21:29:29,496 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:29,496 INFO L276 IsEmpty]: Start isEmpty. Operand 38877 states and 115354 transitions. [2021-03-10 21:29:29,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:29,527 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:29,527 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:29,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21811,420 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:29,728 INFO L428 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:29,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:29,728 INFO L82 PathProgramCache]: Analyzing trace with hash 130635428, now seen corresponding path program 419 times [2021-03-10 21:29:29,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:29,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057892131] [2021-03-10 21:29:29,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:29,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:29,804 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:29,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057892131] [2021-03-10 21:29:29,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700788930] [2021-03-10 21:29:29,805 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:29,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:29:29,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:29,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:29:29,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:29,892 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:29,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:29,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:29:29,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516858609] [2021-03-10 21:29:29,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:29:29,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:29,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:29:29,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:29,892 INFO L87 Difference]: Start difference. First operand 38877 states and 115354 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:30,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:30,079 INFO L93 Difference]: Finished difference Result 39523 states and 116192 transitions. [2021-03-10 21:29:30,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:29:30,080 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:30,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:30,143 INFO L225 Difference]: With dead ends: 39523 [2021-03-10 21:29:30,143 INFO L226 Difference]: Without dead ends: 39523 [2021-03-10 21:29:30,143 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:30,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39523 states. [2021-03-10 21:29:30,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39523 to 38819. [2021-03-10 21:29:30,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38819 states, 38818 states have (on average 2.9664330980472977) internal successors, (115151), 38818 states have internal predecessors, (115151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:30,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38819 states to 38819 states and 115151 transitions. [2021-03-10 21:29:30,970 INFO L78 Accepts]: Start accepts. Automaton has 38819 states and 115151 transitions. Word has length 25 [2021-03-10 21:29:30,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:30,970 INFO L480 AbstractCegarLoop]: Abstraction has 38819 states and 115151 transitions. [2021-03-10 21:29:30,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:30,970 INFO L276 IsEmpty]: Start isEmpty. Operand 38819 states and 115151 transitions. [2021-03-10 21:29:31,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:31,003 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:31,003 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:31,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21812 [2021-03-10 21:29:31,203 INFO L428 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:31,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:31,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1930224374, now seen corresponding path program 420 times [2021-03-10 21:29:31,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:31,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106697560] [2021-03-10 21:29:31,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:31,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:31,287 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:31,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106697560] [2021-03-10 21:29:31,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868336620] [2021-03-10 21:29:31,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:31,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:29:31,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:31,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:29:31,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:31,375 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:31,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:31,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:29:31,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127772085] [2021-03-10 21:29:31,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:31,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:31,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:31,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:31,376 INFO L87 Difference]: Start difference. First operand 38819 states and 115151 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:31,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:31,859 INFO L93 Difference]: Finished difference Result 42306 states and 124008 transitions. [2021-03-10 21:29:31,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:29:31,860 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:31,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:31,922 INFO L225 Difference]: With dead ends: 42306 [2021-03-10 21:29:31,922 INFO L226 Difference]: Without dead ends: 42306 [2021-03-10 21:29:31,922 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 117.1ms TimeCoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:29:31,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42306 states. [2021-03-10 21:29:32,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42306 to 38691. [2021-03-10 21:29:32,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38691 states, 38690 states have (on average 2.9641509433962265) internal successors, (114683), 38690 states have internal predecessors, (114683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:32,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38691 states to 38691 states and 114683 transitions. [2021-03-10 21:29:32,570 INFO L78 Accepts]: Start accepts. Automaton has 38691 states and 114683 transitions. Word has length 25 [2021-03-10 21:29:32,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:32,570 INFO L480 AbstractCegarLoop]: Abstraction has 38691 states and 114683 transitions. [2021-03-10 21:29:32,570 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:32,570 INFO L276 IsEmpty]: Start isEmpty. Operand 38691 states and 114683 transitions. [2021-03-10 21:29:32,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:32,607 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:32,607 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:32,807 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21813,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:32,808 INFO L428 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:32,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:32,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1392368796, now seen corresponding path program 421 times [2021-03-10 21:29:32,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:32,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770533306] [2021-03-10 21:29:32,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:32,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:32,895 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:32,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770533306] [2021-03-10 21:29:32,895 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266100473] [2021-03-10 21:29:32,895 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:32,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:32,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:29:32,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:32,979 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:32,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:32,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:29:32,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824169279] [2021-03-10 21:29:32,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:32,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:32,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:32,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:32,980 INFO L87 Difference]: Start difference. First operand 38691 states and 114683 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:33,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:33,496 INFO L93 Difference]: Finished difference Result 55502 states and 163268 transitions. [2021-03-10 21:29:33,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:29:33,496 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:33,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:33,598 INFO L225 Difference]: With dead ends: 55502 [2021-03-10 21:29:33,598 INFO L226 Difference]: Without dead ends: 55502 [2021-03-10 21:29:33,598 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 152.6ms TimeCoverageRelationStatistics Valid=241, Invalid=409, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:29:33,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55502 states. [2021-03-10 21:29:34,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55502 to 48558. [2021-03-10 21:29:34,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48558 states, 48557 states have (on average 2.977016702020306) internal successors, (144555), 48557 states have internal predecessors, (144555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:34,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48558 states to 48558 states and 144555 transitions. [2021-03-10 21:29:34,628 INFO L78 Accepts]: Start accepts. Automaton has 48558 states and 144555 transitions. Word has length 25 [2021-03-10 21:29:34,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:34,628 INFO L480 AbstractCegarLoop]: Abstraction has 48558 states and 144555 transitions. [2021-03-10 21:29:34,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:34,628 INFO L276 IsEmpty]: Start isEmpty. Operand 48558 states and 144555 transitions. [2021-03-10 21:29:34,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:34,669 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:34,669 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:34,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21814 [2021-03-10 21:29:34,869 INFO L428 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:34,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:34,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1145753042, now seen corresponding path program 422 times [2021-03-10 21:29:34,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:34,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653546298] [2021-03-10 21:29:34,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:34,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:34,962 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:34,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653546298] [2021-03-10 21:29:34,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689119274] [2021-03-10 21:29:34,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:34,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:34,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:34,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:29:34,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:35,043 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:35,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:35,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-03-10 21:29:35,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970071072] [2021-03-10 21:29:35,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:35,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:35,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:35,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:35,044 INFO L87 Difference]: Start difference. First operand 48558 states and 144555 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:35,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:35,354 INFO L93 Difference]: Finished difference Result 55938 states and 164755 transitions. [2021-03-10 21:29:35,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:29:35,354 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:35,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:35,449 INFO L225 Difference]: With dead ends: 55938 [2021-03-10 21:29:35,449 INFO L226 Difference]: Without dead ends: 55938 [2021-03-10 21:29:35,449 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 150.2ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:29:35,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55938 states. [2021-03-10 21:29:36,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55938 to 38647. [2021-03-10 21:29:36,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38647 states, 38646 states have (on average 2.965714433576567) internal successors, (114613), 38646 states have internal predecessors, (114613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:36,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38647 states to 38647 states and 114613 transitions. [2021-03-10 21:29:36,369 INFO L78 Accepts]: Start accepts. Automaton has 38647 states and 114613 transitions. Word has length 25 [2021-03-10 21:29:36,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:36,369 INFO L480 AbstractCegarLoop]: Abstraction has 38647 states and 114613 transitions. [2021-03-10 21:29:36,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:36,369 INFO L276 IsEmpty]: Start isEmpty. Operand 38647 states and 114613 transitions. [2021-03-10 21:29:36,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:36,405 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:36,405 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:36,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21815,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:36,605 INFO L428 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:36,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:36,605 INFO L82 PathProgramCache]: Analyzing trace with hash -131776818, now seen corresponding path program 423 times [2021-03-10 21:29:36,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:36,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344878471] [2021-03-10 21:29:36,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:36,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:36,673 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 41 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:36,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344878471] [2021-03-10 21:29:36,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396354798] [2021-03-10 21:29:36,673 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:36,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 21:29:36,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:36,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:29:36,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:36,747 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 45 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:36,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:36,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:29:36,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456644891] [2021-03-10 21:29:36,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:29:36,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:36,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:29:36,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:36,748 INFO L87 Difference]: Start difference. First operand 38647 states and 114613 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:37,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:37,050 INFO L93 Difference]: Finished difference Result 39269 states and 115484 transitions. [2021-03-10 21:29:37,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:29:37,051 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:37,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:37,310 INFO L225 Difference]: With dead ends: 39269 [2021-03-10 21:29:37,310 INFO L226 Difference]: Without dead ends: 39265 [2021-03-10 21:29:37,310 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 144.8ms TimeCoverageRelationStatistics Valid=243, Invalid=407, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:29:37,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39265 states. [2021-03-10 21:29:37,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39265 to 38661. [2021-03-10 21:29:37,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38661 states, 38660 states have (on average 2.9655975168132436) internal successors, (114650), 38660 states have internal predecessors, (114650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:37,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38661 states to 38661 states and 114650 transitions. [2021-03-10 21:29:37,918 INFO L78 Accepts]: Start accepts. Automaton has 38661 states and 114650 transitions. Word has length 25 [2021-03-10 21:29:37,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:37,918 INFO L480 AbstractCegarLoop]: Abstraction has 38661 states and 114650 transitions. [2021-03-10 21:29:37,918 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:37,918 INFO L276 IsEmpty]: Start isEmpty. Operand 38661 states and 114650 transitions. [2021-03-10 21:29:37,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:37,951 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:37,951 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:38,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21816,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:38,151 INFO L428 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:38,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:38,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1585972242, now seen corresponding path program 424 times [2021-03-10 21:29:38,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:38,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021278501] [2021-03-10 21:29:38,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:38,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:38,221 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:38,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021278501] [2021-03-10 21:29:38,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130989408] [2021-03-10 21:29:38,221 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:38,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:38,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:38,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:29:38,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:38,299 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 43 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:38,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:38,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:29:38,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126985642] [2021-03-10 21:29:38,299 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:29:38,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:38,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:29:38,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:29:38,299 INFO L87 Difference]: Start difference. First operand 38661 states and 114650 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:38,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:38,650 INFO L93 Difference]: Finished difference Result 41548 states and 121884 transitions. [2021-03-10 21:29:38,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:29:38,651 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:38,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:38,708 INFO L225 Difference]: With dead ends: 41548 [2021-03-10 21:29:38,708 INFO L226 Difference]: Without dead ends: 41548 [2021-03-10 21:29:38,708 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=131, Invalid=175, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:38,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41548 states. [2021-03-10 21:29:39,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41548 to 38678. [2021-03-10 21:29:39,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38678 states, 38677 states have (on average 2.9651989554515605) internal successors, (114685), 38677 states have internal predecessors, (114685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:39,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38678 states to 38678 states and 114685 transitions. [2021-03-10 21:29:39,295 INFO L78 Accepts]: Start accepts. Automaton has 38678 states and 114685 transitions. Word has length 25 [2021-03-10 21:29:39,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:39,295 INFO L480 AbstractCegarLoop]: Abstraction has 38678 states and 114685 transitions. [2021-03-10 21:29:39,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:39,295 INFO L276 IsEmpty]: Start isEmpty. Operand 38678 states and 114685 transitions. [2021-03-10 21:29:39,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:39,330 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:39,330 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:39,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21817,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:39,531 INFO L428 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:39,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:39,531 INFO L82 PathProgramCache]: Analyzing trace with hash -143075092, now seen corresponding path program 425 times [2021-03-10 21:29:39,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:39,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011905299] [2021-03-10 21:29:39,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:39,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:39,608 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:39,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011905299] [2021-03-10 21:29:39,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482864081] [2021-03-10 21:29:39,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:39,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 21:29:39,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:39,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:29:39,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:39,690 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:39,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:39,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:29:39,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884165342] [2021-03-10 21:29:39,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:29:39,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:39,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:29:39,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:39,691 INFO L87 Difference]: Start difference. First operand 38678 states and 114685 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:40,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:40,017 INFO L93 Difference]: Finished difference Result 41975 states and 123155 transitions. [2021-03-10 21:29:40,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:29:40,018 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:40,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:40,080 INFO L225 Difference]: With dead ends: 41975 [2021-03-10 21:29:40,081 INFO L226 Difference]: Without dead ends: 41975 [2021-03-10 21:29:40,081 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 207.9ms TimeCoverageRelationStatistics Valid=152, Invalid=228, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:29:40,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41975 states. [2021-03-10 21:29:40,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41975 to 38672. [2021-03-10 21:29:40,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38672 states, 38671 states have (on average 2.9648832458431382) internal successors, (114655), 38671 states have internal predecessors, (114655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:40,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38672 states to 38672 states and 114655 transitions. [2021-03-10 21:29:40,689 INFO L78 Accepts]: Start accepts. Automaton has 38672 states and 114655 transitions. Word has length 25 [2021-03-10 21:29:40,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:40,689 INFO L480 AbstractCegarLoop]: Abstraction has 38672 states and 114655 transitions. [2021-03-10 21:29:40,690 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:40,690 INFO L276 IsEmpty]: Start isEmpty. Operand 38672 states and 114655 transitions. [2021-03-10 21:29:40,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:40,725 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:40,725 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:40,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21818,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:40,925 INFO L428 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:40,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:40,925 INFO L82 PathProgramCache]: Analyzing trace with hash 2091032402, now seen corresponding path program 426 times [2021-03-10 21:29:40,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:40,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285336999] [2021-03-10 21:29:40,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:40,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:41,167 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:41,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285336999] [2021-03-10 21:29:41,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823891911] [2021-03-10 21:29:41,168 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:41,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 21:29:41,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:41,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:29:41,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:41,249 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:41,249 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:41,249 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:29:41,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199499870] [2021-03-10 21:29:41,249 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:29:41,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:41,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:29:41,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:41,249 INFO L87 Difference]: Start difference. First operand 38672 states and 114655 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:41,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:41,509 INFO L93 Difference]: Finished difference Result 60964 states and 181254 transitions. [2021-03-10 21:29:41,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:29:41,509 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:41,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:41,621 INFO L225 Difference]: With dead ends: 60964 [2021-03-10 21:29:41,621 INFO L226 Difference]: Without dead ends: 60964 [2021-03-10 21:29:41,621 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 255.1ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:29:41,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60964 states. [2021-03-10 21:29:42,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60964 to 60066. [2021-03-10 21:29:42,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60066 states, 60065 states have (on average 2.996270706734371) internal successors, (179971), 60065 states have internal predecessors, (179971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:42,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60066 states to 60066 states and 179971 transitions. [2021-03-10 21:29:42,741 INFO L78 Accepts]: Start accepts. Automaton has 60066 states and 179971 transitions. Word has length 25 [2021-03-10 21:29:42,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:42,741 INFO L480 AbstractCegarLoop]: Abstraction has 60066 states and 179971 transitions. [2021-03-10 21:29:42,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:42,741 INFO L276 IsEmpty]: Start isEmpty. Operand 60066 states and 179971 transitions. [2021-03-10 21:29:42,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:42,788 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:42,788 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:42,988 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21819,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:42,988 INFO L428 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:42,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:42,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1666079316, now seen corresponding path program 427 times [2021-03-10 21:29:42,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:42,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656343945] [2021-03-10 21:29:42,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:42,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:43,075 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:43,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656343945] [2021-03-10 21:29:43,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776275941] [2021-03-10 21:29:43,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:43,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:43,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:29:43,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:43,155 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:43,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:43,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-03-10 21:29:43,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738782523] [2021-03-10 21:29:43,155 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:43,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:43,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:43,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:43,155 INFO L87 Difference]: Start difference. First operand 60066 states and 179971 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:43,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:43,470 INFO L93 Difference]: Finished difference Result 63184 states and 187571 transitions. [2021-03-10 21:29:43,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:29:43,471 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:43,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:43,583 INFO L225 Difference]: With dead ends: 63184 [2021-03-10 21:29:43,583 INFO L226 Difference]: Without dead ends: 63184 [2021-03-10 21:29:43,583 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=201, Invalid=351, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:29:43,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63184 states. [2021-03-10 21:29:44,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63184 to 59924. [2021-03-10 21:29:44,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59924 states, 59923 states have (on average 2.995427465247067) internal successors, (179495), 59923 states have internal predecessors, (179495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:44,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59924 states to 59924 states and 179495 transitions. [2021-03-10 21:29:44,983 INFO L78 Accepts]: Start accepts. Automaton has 59924 states and 179495 transitions. Word has length 25 [2021-03-10 21:29:44,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:44,983 INFO L480 AbstractCegarLoop]: Abstraction has 59924 states and 179495 transitions. [2021-03-10 21:29:44,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:44,983 INFO L276 IsEmpty]: Start isEmpty. Operand 59924 states and 179495 transitions. [2021-03-10 21:29:45,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:45,027 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:45,027 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:45,227 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21820 [2021-03-10 21:29:45,228 INFO L428 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:45,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:45,228 INFO L82 PathProgramCache]: Analyzing trace with hash 2122541714, now seen corresponding path program 428 times [2021-03-10 21:29:45,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:45,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712619336] [2021-03-10 21:29:45,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:45,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:45,318 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:45,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712619336] [2021-03-10 21:29:45,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802738633] [2021-03-10 21:29:45,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:45,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:29:45,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:45,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:29:45,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:45,399 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:45,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:45,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-03-10 21:29:45,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164016681] [2021-03-10 21:29:45,399 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:45,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:45,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:45,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:45,400 INFO L87 Difference]: Start difference. First operand 59924 states and 179495 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:45,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:45,882 INFO L93 Difference]: Finished difference Result 90970 states and 272969 transitions. [2021-03-10 21:29:45,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:29:45,883 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:45,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:46,036 INFO L225 Difference]: With dead ends: 90970 [2021-03-10 21:29:46,036 INFO L226 Difference]: Without dead ends: 90970 [2021-03-10 21:29:46,036 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 189.9ms TimeCoverageRelationStatistics Valid=311, Invalid=559, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:29:46,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90970 states. [2021-03-10 21:29:47,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90970 to 87092. [2021-03-10 21:29:47,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87092 states, 87091 states have (on average 3.022287033103306) internal successors, (263214), 87091 states have internal predecessors, (263214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:47,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87092 states to 87092 states and 263214 transitions. [2021-03-10 21:29:47,986 INFO L78 Accepts]: Start accepts. Automaton has 87092 states and 263214 transitions. Word has length 25 [2021-03-10 21:29:47,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:47,986 INFO L480 AbstractCegarLoop]: Abstraction has 87092 states and 263214 transitions. [2021-03-10 21:29:47,986 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:47,986 INFO L276 IsEmpty]: Start isEmpty. Operand 87092 states and 263214 transitions. [2021-03-10 21:29:48,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:48,052 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:48,052 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:48,252 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21821 [2021-03-10 21:29:48,252 INFO L428 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:48,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:48,252 INFO L82 PathProgramCache]: Analyzing trace with hash -195102390, now seen corresponding path program 429 times [2021-03-10 21:29:48,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:48,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905074995] [2021-03-10 21:29:48,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:48,329 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:48,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905074995] [2021-03-10 21:29:48,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759946291] [2021-03-10 21:29:48,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:48,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 21:29:48,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:48,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:29:48,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:48,410 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 37 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:29:48,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:48,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:29:48,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929185496] [2021-03-10 21:29:48,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:29:48,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:48,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:29:48,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:29:48,411 INFO L87 Difference]: Start difference. First operand 87092 states and 263214 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:48,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:48,769 INFO L93 Difference]: Finished difference Result 87908 states and 264688 transitions. [2021-03-10 21:29:48,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:29:48,769 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:48,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:48,926 INFO L225 Difference]: With dead ends: 87908 [2021-03-10 21:29:48,926 INFO L226 Difference]: Without dead ends: 87908 [2021-03-10 21:29:48,926 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 88.4ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:29:48,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87908 states. [2021-03-10 21:29:50,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87908 to 87088. [2021-03-10 21:29:50,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87088 states, 87087 states have (on average 3.0224832638625743) internal successors, (263219), 87087 states have internal predecessors, (263219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:50,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87088 states to 87088 states and 263219 transitions. [2021-03-10 21:29:50,866 INFO L78 Accepts]: Start accepts. Automaton has 87088 states and 263219 transitions. Word has length 25 [2021-03-10 21:29:50,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:50,866 INFO L480 AbstractCegarLoop]: Abstraction has 87088 states and 263219 transitions. [2021-03-10 21:29:50,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:50,866 INFO L276 IsEmpty]: Start isEmpty. Operand 87088 states and 263219 transitions. [2021-03-10 21:29:50,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:50,945 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:50,945 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:51,146 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21822 [2021-03-10 21:29:51,146 INFO L428 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:51,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:51,146 INFO L82 PathProgramCache]: Analyzing trace with hash 342753188, now seen corresponding path program 430 times [2021-03-10 21:29:51,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:51,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659961709] [2021-03-10 21:29:51,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:51,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:51,236 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:51,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659961709] [2021-03-10 21:29:51,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812609174] [2021-03-10 21:29:51,236 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:51,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:29:51,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:51,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:29:51,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:51,315 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:51,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:51,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-03-10 21:29:51,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742158405] [2021-03-10 21:29:51,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:51,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:51,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:51,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:51,316 INFO L87 Difference]: Start difference. First operand 87088 states and 263219 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:51,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:51,743 INFO L93 Difference]: Finished difference Result 94912 states and 285142 transitions. [2021-03-10 21:29:51,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:29:51,744 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:51,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:51,921 INFO L225 Difference]: With dead ends: 94912 [2021-03-10 21:29:51,921 INFO L226 Difference]: Without dead ends: 94912 [2021-03-10 21:29:51,921 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 132.0ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:29:52,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94912 states. [2021-03-10 21:29:53,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94912 to 56562. [2021-03-10 21:29:53,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56562 states, 56561 states have (on average 2.9879068616184297) internal successors, (168999), 56561 states have internal predecessors, (168999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:53,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56562 states to 56562 states and 168999 transitions. [2021-03-10 21:29:53,848 INFO L78 Accepts]: Start accepts. Automaton has 56562 states and 168999 transitions. Word has length 25 [2021-03-10 21:29:53,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:53,848 INFO L480 AbstractCegarLoop]: Abstraction has 56562 states and 168999 transitions. [2021-03-10 21:29:53,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:53,849 INFO L276 IsEmpty]: Start isEmpty. Operand 56562 states and 168999 transitions. [2021-03-10 21:29:53,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:53,899 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:53,899 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:54,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21823,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:54,099 INFO L428 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:54,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:54,099 INFO L82 PathProgramCache]: Analyzing trace with hash -163593078, now seen corresponding path program 431 times [2021-03-10 21:29:54,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:54,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994230956] [2021-03-10 21:29:54,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:54,191 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:54,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994230956] [2021-03-10 21:29:54,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917608709] [2021-03-10 21:29:54,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:54,214 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-03-10 21:29:54,214 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:54,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:29:54,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:54,272 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:54,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:54,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-03-10 21:29:54,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106518545] [2021-03-10 21:29:54,272 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:29:54,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:54,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:29:54,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:29:54,273 INFO L87 Difference]: Start difference. First operand 56562 states and 168999 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:54,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:54,694 INFO L93 Difference]: Finished difference Result 78230 states and 232047 transitions. [2021-03-10 21:29:54,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:29:54,695 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:54,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:54,825 INFO L225 Difference]: With dead ends: 78230 [2021-03-10 21:29:54,825 INFO L226 Difference]: Without dead ends: 78230 [2021-03-10 21:29:54,825 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 186.5ms TimeCoverageRelationStatistics Valid=310, Invalid=560, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:29:54,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78230 states. [2021-03-10 21:29:55,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78230 to 47991. [2021-03-10 21:29:56,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47991 states, 47990 states have (on average 2.974286309647843) internal successors, (142736), 47990 states have internal predecessors, (142736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:56,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47991 states to 47991 states and 142736 transitions. [2021-03-10 21:29:56,105 INFO L78 Accepts]: Start accepts. Automaton has 47991 states and 142736 transitions. Word has length 25 [2021-03-10 21:29:56,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:56,105 INFO L480 AbstractCegarLoop]: Abstraction has 47991 states and 142736 transitions. [2021-03-10 21:29:56,105 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:56,105 INFO L276 IsEmpty]: Start isEmpty. Operand 47991 states and 142736 transitions. [2021-03-10 21:29:56,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:56,145 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:56,145 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:56,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21824,433 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:56,346 INFO L428 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:56,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:56,346 INFO L82 PathProgramCache]: Analyzing trace with hash 76191076, now seen corresponding path program 432 times [2021-03-10 21:29:56,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:56,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567990906] [2021-03-10 21:29:56,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:56,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:56,656 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:29:56,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567990906] [2021-03-10 21:29:56,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550216879] [2021-03-10 21:29:56,657 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:56,679 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 21:29:56,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:29:56,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:29:56,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:56,733 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 37 proven. 36 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:29:56,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:56,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:29:56,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552456845] [2021-03-10 21:29:56,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:29:56,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:56,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:29:56,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:29:56,734 INFO L87 Difference]: Start difference. First operand 47991 states and 142736 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:57,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:57,043 INFO L93 Difference]: Finished difference Result 48514 states and 143403 transitions. [2021-03-10 21:29:57,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:29:57,044 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:57,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:57,124 INFO L225 Difference]: With dead ends: 48514 [2021-03-10 21:29:57,125 INFO L226 Difference]: Without dead ends: 48510 [2021-03-10 21:29:57,125 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 138.2ms TimeCoverageRelationStatistics Valid=212, Invalid=388, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:29:57,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48510 states. [2021-03-10 21:29:57,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48510 to 47991. [2021-03-10 21:29:57,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47991 states, 47990 states have (on average 2.9742029589497814) internal successors, (142732), 47990 states have internal predecessors, (142732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:58,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47991 states to 47991 states and 142732 transitions. [2021-03-10 21:29:58,087 INFO L78 Accepts]: Start accepts. Automaton has 47991 states and 142732 transitions. Word has length 25 [2021-03-10 21:29:58,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:58,087 INFO L480 AbstractCegarLoop]: Abstraction has 47991 states and 142732 transitions. [2021-03-10 21:29:58,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:58,087 INFO L276 IsEmpty]: Start isEmpty. Operand 47991 states and 142732 transitions. [2021-03-10 21:29:58,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:58,123 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:58,123 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:29:58,324 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21825,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:58,324 INFO L428 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:29:58,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:29:58,324 INFO L82 PathProgramCache]: Analyzing trace with hash -800059932, now seen corresponding path program 433 times [2021-03-10 21:29:58,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:29:58,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827766683] [2021-03-10 21:29:58,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:29:58,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:58,417 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:58,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827766683] [2021-03-10 21:29:58,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785216779] [2021-03-10 21:29:58,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:29:58,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:29:58,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:29:58,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:29:58,514 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:29:58,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:29:58,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-03-10 21:29:58,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503239935] [2021-03-10 21:29:58,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:29:58,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:29:58,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:29:58,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:29:58,515 INFO L87 Difference]: Start difference. First operand 47991 states and 142732 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:58,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:29:58,877 INFO L93 Difference]: Finished difference Result 56834 states and 167301 transitions. [2021-03-10 21:29:58,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:29:58,878 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:29:58,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:29:58,981 INFO L225 Difference]: With dead ends: 56834 [2021-03-10 21:29:58,981 INFO L226 Difference]: Without dead ends: 56834 [2021-03-10 21:29:58,981 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 189.9ms TimeCoverageRelationStatistics Valid=313, Invalid=557, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:29:59,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56834 states. [2021-03-10 21:29:59,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56834 to 38382. [2021-03-10 21:29:59,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38382 states, 38381 states have (on average 2.965660092233136) internal successors, (113825), 38381 states have internal predecessors, (113825), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:59,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38382 states to 38382 states and 113825 transitions. [2021-03-10 21:29:59,946 INFO L78 Accepts]: Start accepts. Automaton has 38382 states and 113825 transitions. Word has length 25 [2021-03-10 21:29:59,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:29:59,946 INFO L480 AbstractCegarLoop]: Abstraction has 38382 states and 113825 transitions. [2021-03-10 21:29:59,946 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:29:59,946 INFO L276 IsEmpty]: Start isEmpty. Operand 38382 states and 113825 transitions. [2021-03-10 21:29:59,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:29:59,983 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:29:59,983 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:00,184 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21826,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:00,184 INFO L428 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:00,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:00,184 INFO L82 PathProgramCache]: Analyzing trace with hash -26868346, now seen corresponding path program 434 times [2021-03-10 21:30:00,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:00,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537691584] [2021-03-10 21:30:00,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:00,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:00,256 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 40 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:00,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537691584] [2021-03-10 21:30:00,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614646099] [2021-03-10 21:30:00,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:00,276 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:30:00,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:00,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:30:00,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:00,331 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 45 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:30:00,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:00,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:30:00,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888798787] [2021-03-10 21:30:00,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:30:00,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:00,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:30:00,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:30:00,331 INFO L87 Difference]: Start difference. First operand 38382 states and 113825 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:00,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:00,633 INFO L93 Difference]: Finished difference Result 38968 states and 114634 transitions. [2021-03-10 21:30:00,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:30:00,634 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:30:00,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:00,685 INFO L225 Difference]: With dead ends: 38968 [2021-03-10 21:30:00,686 INFO L226 Difference]: Without dead ends: 38964 [2021-03-10 21:30:00,686 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 148.4ms TimeCoverageRelationStatistics Valid=242, Invalid=408, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:30:00,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38964 states. [2021-03-10 21:30:01,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38964 to 38396. [2021-03-10 21:30:01,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38396 states, 38395 states have (on average 2.9655684333897643) internal successors, (113863), 38395 states have internal predecessors, (113863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:01,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38396 states to 38396 states and 113863 transitions. [2021-03-10 21:30:01,468 INFO L78 Accepts]: Start accepts. Automaton has 38396 states and 113863 transitions. Word has length 25 [2021-03-10 21:30:01,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:01,468 INFO L480 AbstractCegarLoop]: Abstraction has 38396 states and 113863 transitions. [2021-03-10 21:30:01,468 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:01,468 INFO L276 IsEmpty]: Start isEmpty. Operand 38396 states and 113863 transitions. [2021-03-10 21:30:01,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:30:01,502 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:01,502 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:01,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21827,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:01,703 INFO L428 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:01,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:01,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1690880714, now seen corresponding path program 435 times [2021-03-10 21:30:01,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:01,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171875567] [2021-03-10 21:30:01,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:01,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:01,770 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:01,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171875567] [2021-03-10 21:30:01,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012291043] [2021-03-10 21:30:01,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:01,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 21:30:01,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:01,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:30:01,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:01,855 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 44 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:01,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:01,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:30:01,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549198131] [2021-03-10 21:30:01,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:30:01,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:01,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:30:01,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:30:01,856 INFO L87 Difference]: Start difference. First operand 38396 states and 113863 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:02,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:02,079 INFO L93 Difference]: Finished difference Result 41573 states and 121933 transitions. [2021-03-10 21:30:02,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:30:02,080 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:30:02,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:02,152 INFO L225 Difference]: With dead ends: 41573 [2021-03-10 21:30:02,153 INFO L226 Difference]: Without dead ends: 41573 [2021-03-10 21:30:02,153 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=144, Invalid=198, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:30:02,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41573 states. [2021-03-10 21:30:02,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41573 to 38413. [2021-03-10 21:30:02,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38413 states, 38412 states have (on average 2.9653493699885454) internal successors, (113905), 38412 states have internal predecessors, (113905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:03,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38413 states to 38413 states and 113905 transitions. [2021-03-10 21:30:03,058 INFO L78 Accepts]: Start accepts. Automaton has 38413 states and 113905 transitions. Word has length 25 [2021-03-10 21:30:03,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:03,058 INFO L480 AbstractCegarLoop]: Abstraction has 38413 states and 113905 transitions. [2021-03-10 21:30:03,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:03,058 INFO L276 IsEmpty]: Start isEmpty. Operand 38413 states and 113905 transitions. [2021-03-10 21:30:03,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:30:03,098 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:03,098 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:03,298 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21828,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:03,298 INFO L428 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:03,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:03,299 INFO L82 PathProgramCache]: Analyzing trace with hash -38166620, now seen corresponding path program 436 times [2021-03-10 21:30:03,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:03,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513127693] [2021-03-10 21:30:03,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:03,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:03,372 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:30:03,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513127693] [2021-03-10 21:30:03,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117133685] [2021-03-10 21:30:03,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:03,392 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:30:03,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:03,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:30:03,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:03,460 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:30:03,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:03,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:30:03,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439729120] [2021-03-10 21:30:03,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:30:03,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:03,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:30:03,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:30:03,461 INFO L87 Difference]: Start difference. First operand 38413 states and 113905 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:03,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:03,712 INFO L93 Difference]: Finished difference Result 43427 states and 127338 transitions. [2021-03-10 21:30:03,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:30:03,713 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:30:03,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:03,783 INFO L225 Difference]: With dead ends: 43427 [2021-03-10 21:30:03,784 INFO L226 Difference]: Without dead ends: 43427 [2021-03-10 21:30:03,784 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:30:03,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43427 states. [2021-03-10 21:30:04,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43427 to 38418. [2021-03-10 21:30:04,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38418 states, 38417 states have (on average 2.965197698935367) internal successors, (113914), 38417 states have internal predecessors, (113914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:04,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38418 states to 38418 states and 113914 transitions. [2021-03-10 21:30:04,645 INFO L78 Accepts]: Start accepts. Automaton has 38418 states and 113914 transitions. Word has length 25 [2021-03-10 21:30:04,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:04,645 INFO L480 AbstractCegarLoop]: Abstraction has 38418 states and 113914 transitions. [2021-03-10 21:30:04,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:04,645 INFO L276 IsEmpty]: Start isEmpty. Operand 38418 states and 113914 transitions. [2021-03-10 21:30:04,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:30:04,680 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:04,680 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:04,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21829,438 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:04,881 INFO L428 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:04,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:04,881 INFO L82 PathProgramCache]: Analyzing trace with hash -2099026422, now seen corresponding path program 437 times [2021-03-10 21:30:04,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:04,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356720067] [2021-03-10 21:30:04,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:04,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:04,966 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:04,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356720067] [2021-03-10 21:30:04,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742472281] [2021-03-10 21:30:04,966 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:04,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 21:30:04,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:04,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:30:04,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:05,057 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:05,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:05,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:30:05,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517645617] [2021-03-10 21:30:05,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:30:05,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:05,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:30:05,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:30:05,058 INFO L87 Difference]: Start difference. First operand 38418 states and 113914 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:05,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:05,305 INFO L93 Difference]: Finished difference Result 42897 states and 125903 transitions. [2021-03-10 21:30:05,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:30:05,306 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:30:05,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:05,378 INFO L225 Difference]: With dead ends: 42897 [2021-03-10 21:30:05,379 INFO L226 Difference]: Without dead ends: 42897 [2021-03-10 21:30:05,379 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 126.8ms TimeCoverageRelationStatistics Valid=191, Invalid=315, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:05,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42897 states. [2021-03-10 21:30:06,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42897 to 38354. [2021-03-10 21:30:06,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38354 states, 38353 states have (on average 2.964644226005788) internal successors, (113703), 38353 states have internal predecessors, (113703), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:06,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38354 states to 38354 states and 113703 transitions. [2021-03-10 21:30:06,172 INFO L78 Accepts]: Start accepts. Automaton has 38354 states and 113703 transitions. Word has length 25 [2021-03-10 21:30:06,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:06,172 INFO L480 AbstractCegarLoop]: Abstraction has 38354 states and 113703 transitions. [2021-03-10 21:30:06,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:06,172 INFO L276 IsEmpty]: Start isEmpty. Operand 38354 states and 113703 transitions. [2021-03-10 21:30:06,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:30:06,207 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:06,207 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:06,407 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21830,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:06,408 INFO L428 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:06,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:06,408 INFO L82 PathProgramCache]: Analyzing trace with hash -1561170844, now seen corresponding path program 438 times [2021-03-10 21:30:06,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:06,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492370163] [2021-03-10 21:30:06,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:06,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:06,494 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:30:06,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492370163] [2021-03-10 21:30:06,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008565472] [2021-03-10 21:30:06,495 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:06,517 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 21:30:06,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:06,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:30:06,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:06,585 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:30:06,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:06,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:30:06,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514669838] [2021-03-10 21:30:06,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:30:06,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:06,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:30:06,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:30:06,586 INFO L87 Difference]: Start difference. First operand 38354 states and 113703 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:06,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:06,877 INFO L93 Difference]: Finished difference Result 63716 states and 189177 transitions. [2021-03-10 21:30:06,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:30:06,878 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:30:06,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:06,993 INFO L225 Difference]: With dead ends: 63716 [2021-03-10 21:30:06,993 INFO L226 Difference]: Without dead ends: 63716 [2021-03-10 21:30:06,994 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:30:07,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63716 states. [2021-03-10 21:30:07,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63716 to 58655. [2021-03-10 21:30:08,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58655 states, 58654 states have (on average 2.9932314931632966) internal successors, (175565), 58654 states have internal predecessors, (175565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:08,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58655 states to 58655 states and 175565 transitions. [2021-03-10 21:30:08,448 INFO L78 Accepts]: Start accepts. Automaton has 58655 states and 175565 transitions. Word has length 25 [2021-03-10 21:30:08,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:08,449 INFO L480 AbstractCegarLoop]: Abstraction has 58655 states and 175565 transitions. [2021-03-10 21:30:08,449 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:08,449 INFO L276 IsEmpty]: Start isEmpty. Operand 58655 states and 175565 transitions. [2021-03-10 21:30:08,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:30:08,490 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:08,490 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:08,690 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21831,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:08,691 INFO L428 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:08,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:08,691 INFO L82 PathProgramCache]: Analyzing trace with hash -2067517110, now seen corresponding path program 439 times [2021-03-10 21:30:08,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:08,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389874873] [2021-03-10 21:30:08,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:08,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:08,784 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:08,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389874873] [2021-03-10 21:30:08,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348326927] [2021-03-10 21:30:08,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:08,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:08,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:30:08,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:08,869 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:08,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:08,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-03-10 21:30:08,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404488788] [2021-03-10 21:30:08,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:30:08,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:08,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:30:08,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:30:08,870 INFO L87 Difference]: Start difference. First operand 58655 states and 175565 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:09,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:09,245 INFO L93 Difference]: Finished difference Result 65878 states and 195353 transitions. [2021-03-10 21:30:09,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:30:09,246 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:30:09,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:09,366 INFO L225 Difference]: With dead ends: 65878 [2021-03-10 21:30:09,367 INFO L226 Difference]: Without dead ends: 65878 [2021-03-10 21:30:09,367 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 162.7ms TimeCoverageRelationStatistics Valid=247, Invalid=455, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:30:09,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65878 states. [2021-03-10 21:30:10,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65878 to 58492. [2021-03-10 21:30:10,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58492 states, 58491 states have (on average 2.992528765109162) internal successors, (175036), 58491 states have internal predecessors, (175036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:10,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58492 states to 58492 states and 175036 transitions. [2021-03-10 21:30:10,605 INFO L78 Accepts]: Start accepts. Automaton has 58492 states and 175036 transitions. Word has length 25 [2021-03-10 21:30:10,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:10,606 INFO L480 AbstractCegarLoop]: Abstraction has 58492 states and 175036 transitions. [2021-03-10 21:30:10,606 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:10,606 INFO L276 IsEmpty]: Start isEmpty. Operand 58492 states and 175036 transitions. [2021-03-10 21:30:10,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:30:10,653 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:10,653 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:10,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21832 [2021-03-10 21:30:10,854 INFO L428 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:10,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:10,854 INFO L82 PathProgramCache]: Analyzing trace with hash -584382172, now seen corresponding path program 440 times [2021-03-10 21:30:10,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:10,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243458672] [2021-03-10 21:30:10,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:10,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:10,957 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:10,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243458672] [2021-03-10 21:30:10,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718013351] [2021-03-10 21:30:10,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:10,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:30:10,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:10,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:30:10,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:11,047 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:11,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:11,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-03-10 21:30:11,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101766121] [2021-03-10 21:30:11,047 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:30:11,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:11,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:30:11,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:30:11,047 INFO L87 Difference]: Start difference. First operand 58492 states and 175036 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:11,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:11,876 INFO L93 Difference]: Finished difference Result 92257 states and 276233 transitions. [2021-03-10 21:30:11,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:30:11,877 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:30:11,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:12,092 INFO L225 Difference]: With dead ends: 92257 [2021-03-10 21:30:12,092 INFO L226 Difference]: Without dead ends: 92257 [2021-03-10 21:30:12,092 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 240.8ms TimeCoverageRelationStatistics Valid=418, Invalid=772, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:30:12,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92257 states. [2021-03-10 21:30:13,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92257 to 82743. [2021-03-10 21:30:13,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82743 states, 82742 states have (on average 3.0198569045950063) internal successors, (249869), 82742 states have internal predecessors, (249869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:13,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82743 states to 82743 states and 249869 transitions. [2021-03-10 21:30:13,733 INFO L78 Accepts]: Start accepts. Automaton has 82743 states and 249869 transitions. Word has length 25 [2021-03-10 21:30:13,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:13,733 INFO L480 AbstractCegarLoop]: Abstraction has 82743 states and 249869 transitions. [2021-03-10 21:30:13,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:13,733 INFO L276 IsEmpty]: Start isEmpty. Operand 82743 states and 249869 transitions. [2021-03-10 21:30:13,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:30:13,809 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:13,809 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:14,010 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21833,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:14,010 INFO L428 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:14,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:14,010 INFO L82 PathProgramCache]: Analyzing trace with hash 583094636, now seen corresponding path program 441 times [2021-03-10 21:30:14,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:14,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392398273] [2021-03-10 21:30:14,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:14,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:14,097 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:30:14,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392398273] [2021-03-10 21:30:14,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48347213] [2021-03-10 21:30:14,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:14,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 21:30:14,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:14,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:30:14,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:14,182 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:30:14,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:14,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-03-10 21:30:14,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310241010] [2021-03-10 21:30:14,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:30:14,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:14,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:30:14,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:30:14,182 INFO L87 Difference]: Start difference. First operand 82743 states and 249869 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:14,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:14,899 INFO L93 Difference]: Finished difference Result 83322 states and 250595 transitions. [2021-03-10 21:30:14,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:30:14,903 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:30:14,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:15,088 INFO L225 Difference]: With dead ends: 83322 [2021-03-10 21:30:15,088 INFO L226 Difference]: Without dead ends: 83321 [2021-03-10 21:30:15,088 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 108.9ms TimeCoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:30:15,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83321 states. [2021-03-10 21:30:16,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83321 to 82266. [2021-03-10 21:30:16,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82266 states, 82265 states have (on average 3.0184768735185075) internal successors, (248315), 82265 states have internal predecessors, (248315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:16,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82266 states to 82266 states and 248315 transitions. [2021-03-10 21:30:16,640 INFO L78 Accepts]: Start accepts. Automaton has 82266 states and 248315 transitions. Word has length 25 [2021-03-10 21:30:16,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:16,640 INFO L480 AbstractCegarLoop]: Abstraction has 82266 states and 248315 transitions. [2021-03-10 21:30:16,640 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:16,640 INFO L276 IsEmpty]: Start isEmpty. Operand 82266 states and 248315 transitions. [2021-03-10 21:30:16,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:30:16,710 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:16,710 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:16,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21834,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:16,910 INFO L428 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:16,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:16,910 INFO L82 PathProgramCache]: Analyzing trace with hash 76748370, now seen corresponding path program 442 times [2021-03-10 21:30:16,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:16,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1544731173] [2021-03-10 21:30:16,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:16,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:17,007 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:17,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1544731173] [2021-03-10 21:30:17,007 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263469915] [2021-03-10 21:30:17,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:17,028 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:30:17,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:17,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:30:17,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:17,090 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:17,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:17,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-03-10 21:30:17,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97086352] [2021-03-10 21:30:17,090 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:30:17,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:17,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:30:17,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=213, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:30:17,090 INFO L87 Difference]: Start difference. First operand 82266 states and 248315 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:17,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:17,550 INFO L93 Difference]: Finished difference Result 90893 states and 272842 transitions. [2021-03-10 21:30:17,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:30:17,551 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:30:17,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:18,160 INFO L225 Difference]: With dead ends: 90893 [2021-03-10 21:30:18,160 INFO L226 Difference]: Without dead ends: 90893 [2021-03-10 21:30:18,160 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 160.0ms TimeCoverageRelationStatistics Valid=246, Invalid=456, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:30:18,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90893 states. [2021-03-10 21:30:19,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90893 to 54760. [2021-03-10 21:30:19,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54760 states, 54759 states have (on average 2.982103398528096) internal successors, (163297), 54759 states have internal predecessors, (163297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:19,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54760 states to 54760 states and 163297 transitions. [2021-03-10 21:30:19,486 INFO L78 Accepts]: Start accepts. Automaton has 54760 states and 163297 transitions. Word has length 25 [2021-03-10 21:30:19,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:19,486 INFO L480 AbstractCegarLoop]: Abstraction has 54760 states and 163297 transitions. [2021-03-10 21:30:19,486 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:19,486 INFO L276 IsEmpty]: Start isEmpty. Operand 54760 states and 163297 transitions. [2021-03-10 21:30:19,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:30:19,529 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:19,529 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:19,729 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21835,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:19,729 INFO L428 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:19,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:19,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1559883308, now seen corresponding path program 443 times [2021-03-10 21:30:19,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:19,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997377504] [2021-03-10 21:30:19,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:19,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:19,854 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:19,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997377504] [2021-03-10 21:30:19,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086953342] [2021-03-10 21:30:19,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:19,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 21:30:19,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:19,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:30:19,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:19,939 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:19,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:19,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-03-10 21:30:19,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526470097] [2021-03-10 21:30:19,940 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:30:19,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:19,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:30:19,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:30:19,940 INFO L87 Difference]: Start difference. First operand 54760 states and 163297 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:20,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:20,430 INFO L93 Difference]: Finished difference Result 77734 states and 230348 transitions. [2021-03-10 21:30:20,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:30:20,431 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:30:20,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:20,582 INFO L225 Difference]: With dead ends: 77734 [2021-03-10 21:30:20,582 INFO L226 Difference]: Without dead ends: 77734 [2021-03-10 21:30:20,582 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 260.6ms TimeCoverageRelationStatistics Valid=417, Invalid=773, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:30:20,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77734 states. [2021-03-10 21:30:21,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77734 to 43949. [2021-03-10 21:30:21,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43949 states, 43948 states have (on average 2.969532174387913) internal successors, (130505), 43948 states have internal predecessors, (130505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:21,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43949 states to 43949 states and 130505 transitions. [2021-03-10 21:30:21,853 INFO L78 Accepts]: Start accepts. Automaton has 43949 states and 130505 transitions. Word has length 25 [2021-03-10 21:30:21,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:21,853 INFO L480 AbstractCegarLoop]: Abstraction has 43949 states and 130505 transitions. [2021-03-10 21:30:21,853 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:21,853 INFO L276 IsEmpty]: Start isEmpty. Operand 43949 states and 130505 transitions. [2021-03-10 21:30:21,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:30:21,891 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:21,891 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:22,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21836 [2021-03-10 21:30:22,092 INFO L428 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:22,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:22,092 INFO L82 PathProgramCache]: Analyzing trace with hash -990719982, now seen corresponding path program 444 times [2021-03-10 21:30:22,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:22,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204703975] [2021-03-10 21:30:22,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:22,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:22,237 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:22,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204703975] [2021-03-10 21:30:22,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208539550] [2021-03-10 21:30:22,237 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:22,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 21:30:22,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:22,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:30:22,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:22,340 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:22,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:22,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-03-10 21:30:22,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909054459] [2021-03-10 21:30:22,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:30:22,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:22,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:30:22,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:30:22,341 INFO L87 Difference]: Start difference. First operand 43949 states and 130505 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:23,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:23,025 INFO L93 Difference]: Finished difference Result 74263 states and 220319 transitions. [2021-03-10 21:30:23,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:30:23,026 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:30:23,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:23,165 INFO L225 Difference]: With dead ends: 74263 [2021-03-10 21:30:23,165 INFO L226 Difference]: Without dead ends: 74263 [2021-03-10 21:30:23,165 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 284.2ms TimeCoverageRelationStatistics Valid=370, Invalid=686, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:30:23,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74263 states. [2021-03-10 21:30:24,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74263 to 67922. [2021-03-10 21:30:24,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67922 states, 67921 states have (on average 2.9886780229973056) internal successors, (202994), 67921 states have internal predecessors, (202994), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:24,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67922 states to 67922 states and 202994 transitions. [2021-03-10 21:30:24,547 INFO L78 Accepts]: Start accepts. Automaton has 67922 states and 202994 transitions. Word has length 25 [2021-03-10 21:30:24,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:24,547 INFO L480 AbstractCegarLoop]: Abstraction has 67922 states and 202994 transitions. [2021-03-10 21:30:24,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:24,548 INFO L276 IsEmpty]: Start isEmpty. Operand 67922 states and 202994 transitions. [2021-03-10 21:30:24,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:30:24,601 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:24,601 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:24,802 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21837,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:24,802 INFO L428 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:24,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:24,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1069673010, now seen corresponding path program 445 times [2021-03-10 21:30:24,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:24,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062071211] [2021-03-10 21:30:24,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:24,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:24,873 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 37 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:24,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062071211] [2021-03-10 21:30:24,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676473851] [2021-03-10 21:30:24,873 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:24,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:24,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:30:24,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 43 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:30:24,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:24,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:30:24,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73134654] [2021-03-10 21:30:24,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:30:24,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:24,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:30:24,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:30:24,950 INFO L87 Difference]: Start difference. First operand 67922 states and 202994 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:25,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:25,382 INFO L93 Difference]: Finished difference Result 68435 states and 203689 transitions. [2021-03-10 21:30:25,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:30:25,383 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:30:25,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:25,504 INFO L225 Difference]: With dead ends: 68435 [2021-03-10 21:30:25,504 INFO L226 Difference]: Without dead ends: 68431 [2021-03-10 21:30:25,504 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 152.9ms TimeCoverageRelationStatistics Valid=241, Invalid=409, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:30:25,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68431 states. [2021-03-10 21:30:26,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68431 to 67936. [2021-03-10 21:30:27,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67936 states, 67935 states have (on average 2.988253477588872) internal successors, (203007), 67935 states have internal predecessors, (203007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:27,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67936 states to 67936 states and 203007 transitions. [2021-03-10 21:30:27,174 INFO L78 Accepts]: Start accepts. Automaton has 67936 states and 203007 transitions. Word has length 25 [2021-03-10 21:30:27,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:27,174 INFO L480 AbstractCegarLoop]: Abstraction has 67936 states and 203007 transitions. [2021-03-10 21:30:27,174 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:27,174 INFO L276 IsEmpty]: Start isEmpty. Operand 67936 states and 203007 transitions. [2021-03-10 21:30:27,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:30:27,226 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:27,226 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:27,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21838,447 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:27,426 INFO L428 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:27,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:27,427 INFO L82 PathProgramCache]: Analyzing trace with hash 648076050, now seen corresponding path program 446 times [2021-03-10 21:30:27,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:27,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529202376] [2021-03-10 21:30:27,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:27,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:27,508 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 36 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:30:27,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529202376] [2021-03-10 21:30:27,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900199211] [2021-03-10 21:30:27,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:27,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:30:27,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:27,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:30:27,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:27,585 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 42 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:30:27,586 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:27,586 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:30:27,586 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803245047] [2021-03-10 21:30:27,586 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:30:27,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:27,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:30:27,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:30:27,586 INFO L87 Difference]: Start difference. First operand 67936 states and 203007 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:27,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:27,916 INFO L93 Difference]: Finished difference Result 74376 states and 220879 transitions. [2021-03-10 21:30:27,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:30:27,917 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:30:27,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:28,053 INFO L225 Difference]: With dead ends: 74376 [2021-03-10 21:30:28,053 INFO L226 Difference]: Without dead ends: 74376 [2021-03-10 21:30:28,053 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:30:28,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74376 states. [2021-03-10 21:30:29,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74376 to 67967. [2021-03-10 21:30:29,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67967 states, 67966 states have (on average 2.988155842627196) internal successors, (203093), 67966 states have internal predecessors, (203093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:29,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67967 states to 67967 states and 203093 transitions. [2021-03-10 21:30:29,922 INFO L78 Accepts]: Start accepts. Automaton has 67967 states and 203093 transitions. Word has length 25 [2021-03-10 21:30:29,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:29,922 INFO L480 AbstractCegarLoop]: Abstraction has 67967 states and 203093 transitions. [2021-03-10 21:30:29,922 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:29,922 INFO L276 IsEmpty]: Start isEmpty. Operand 67967 states and 203093 transitions. [2021-03-10 21:30:29,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:30:29,989 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:29,989 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:30,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21839,448 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:30,189 INFO L428 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:30,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:30,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1080971284, now seen corresponding path program 447 times [2021-03-10 21:30:30,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:30,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806283956] [2021-03-10 21:30:30,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:30,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:30,271 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:30,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806283956] [2021-03-10 21:30:30,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759717740] [2021-03-10 21:30:30,271 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:30,295 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:30:30,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:30,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:30:30,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:30,357 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:30,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:30,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:30:30,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027309084] [2021-03-10 21:30:30,357 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:30:30,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:30,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:30:30,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:30:30,357 INFO L87 Difference]: Start difference. First operand 67967 states and 203093 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:30,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:30,744 INFO L93 Difference]: Finished difference Result 78884 states and 234170 transitions. [2021-03-10 21:30:30,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:30:30,745 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:30:30,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:30,892 INFO L225 Difference]: With dead ends: 78884 [2021-03-10 21:30:30,892 INFO L226 Difference]: Without dead ends: 78884 [2021-03-10 21:30:30,892 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 131.6ms TimeCoverageRelationStatistics Valid=215, Invalid=337, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:30:30,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78884 states. [2021-03-10 21:30:32,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78884 to 67988. [2021-03-10 21:30:32,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67988 states, 67987 states have (on average 2.988071248915234) internal successors, (203150), 67987 states have internal predecessors, (203150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:32,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67988 states to 67988 states and 203150 transitions. [2021-03-10 21:30:32,415 INFO L78 Accepts]: Start accepts. Automaton has 67988 states and 203150 transitions. Word has length 25 [2021-03-10 21:30:32,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:32,415 INFO L480 AbstractCegarLoop]: Abstraction has 67988 states and 203150 transitions. [2021-03-10 21:30:32,415 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:32,415 INFO L276 IsEmpty]: Start isEmpty. Operand 67988 states and 203150 transitions. [2021-03-10 21:30:32,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:30:32,467 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:32,467 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:32,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21840,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:32,668 INFO L428 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:32,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:32,668 INFO L82 PathProgramCache]: Analyzing trace with hash 1153136210, now seen corresponding path program 448 times [2021-03-10 21:30:32,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:32,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175874400] [2021-03-10 21:30:32,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:32,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:32,748 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:30:32,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175874400] [2021-03-10 21:30:32,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606140342] [2021-03-10 21:30:32,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:32,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:30:32,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:32,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:30:32,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:32,834 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:30:32,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:32,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:30:32,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523619800] [2021-03-10 21:30:32,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:30:32,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:32,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:30:32,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:30:32,835 INFO L87 Difference]: Start difference. First operand 67988 states and 203150 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:33,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:33,560 INFO L93 Difference]: Finished difference Result 114424 states and 344057 transitions. [2021-03-10 21:30:33,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:30:33,561 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:30:33,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:33,796 INFO L225 Difference]: With dead ends: 114424 [2021-03-10 21:30:33,796 INFO L226 Difference]: Without dead ends: 114424 [2021-03-10 21:30:33,796 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=224, Invalid=376, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:30:33,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114424 states. [2021-03-10 21:30:36,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114424 to 104105. [2021-03-10 21:30:36,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104105 states, 104104 states have (on average 3.02537846768616) internal successors, (314954), 104104 states have internal predecessors, (314954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:36,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104105 states to 104105 states and 314954 transitions. [2021-03-10 21:30:36,531 INFO L78 Accepts]: Start accepts. Automaton has 104105 states and 314954 transitions. Word has length 25 [2021-03-10 21:30:36,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:36,531 INFO L480 AbstractCegarLoop]: Abstraction has 104105 states and 314954 transitions. [2021-03-10 21:30:36,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:36,531 INFO L276 IsEmpty]: Start isEmpty. Operand 104105 states and 314954 transitions. [2021-03-10 21:30:36,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:30:36,619 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:36,619 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:36,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21841,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:36,835 INFO L428 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:36,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:36,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1690991788, now seen corresponding path program 449 times [2021-03-10 21:30:36,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:36,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603535774] [2021-03-10 21:30:36,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:36,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:36,948 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:36,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603535774] [2021-03-10 21:30:36,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629443016] [2021-03-10 21:30:36,948 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:36,978 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 21:30:36,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:36,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:30:36,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:37,045 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:37,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:37,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-03-10 21:30:37,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171050025] [2021-03-10 21:30:37,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:30:37,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:37,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:30:37,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:30:37,046 INFO L87 Difference]: Start difference. First operand 104105 states and 314954 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:37,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:37,642 INFO L93 Difference]: Finished difference Result 110268 states and 331729 transitions. [2021-03-10 21:30:37,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:30:37,643 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:30:37,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:37,875 INFO L225 Difference]: With dead ends: 110268 [2021-03-10 21:30:37,875 INFO L226 Difference]: Without dead ends: 110268 [2021-03-10 21:30:37,876 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 179.9ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:30:37,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110268 states. [2021-03-10 21:30:39,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110268 to 102357. [2021-03-10 21:30:39,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102357 states, 102356 states have (on average 3.0227539176990113) internal successors, (309397), 102356 states have internal predecessors, (309397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:40,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102357 states to 102357 states and 309397 transitions. [2021-03-10 21:30:40,255 INFO L78 Accepts]: Start accepts. Automaton has 102357 states and 309397 transitions. Word has length 25 [2021-03-10 21:30:40,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:40,255 INFO L480 AbstractCegarLoop]: Abstraction has 102357 states and 309397 transitions. [2021-03-10 21:30:40,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:40,255 INFO L276 IsEmpty]: Start isEmpty. Operand 102357 states and 309397 transitions. [2021-03-10 21:30:40,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:30:40,325 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:40,325 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:40,526 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21842 [2021-03-10 21:30:40,526 INFO L428 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:40,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:40,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1184645522, now seen corresponding path program 450 times [2021-03-10 21:30:40,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:40,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037791799] [2021-03-10 21:30:40,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:40,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:40,620 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:30:40,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037791799] [2021-03-10 21:30:40,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951236163] [2021-03-10 21:30:40,620 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:40,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 21:30:40,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:40,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:30:40,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:40,705 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:30:40,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:40,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-03-10 21:30:40,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608421406] [2021-03-10 21:30:40,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:30:40,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:40,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:30:40,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:30:40,706 INFO L87 Difference]: Start difference. First operand 102357 states and 309397 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:41,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:41,976 INFO L93 Difference]: Finished difference Result 187580 states and 568248 transitions. [2021-03-10 21:30:41,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:30:41,977 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:30:41,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:42,407 INFO L225 Difference]: With dead ends: 187580 [2021-03-10 21:30:42,407 INFO L226 Difference]: Without dead ends: 187580 [2021-03-10 21:30:42,407 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 133.9ms TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:30:42,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187580 states. [2021-03-10 21:30:45,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187580 to 185975. [2021-03-10 21:30:45,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185975 states, 185974 states have (on average 3.0363814296622107) internal successors, (564688), 185974 states have internal predecessors, (564688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:46,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185975 states to 185975 states and 564688 transitions. [2021-03-10 21:30:46,476 INFO L78 Accepts]: Start accepts. Automaton has 185975 states and 564688 transitions. Word has length 25 [2021-03-10 21:30:46,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:46,476 INFO L480 AbstractCegarLoop]: Abstraction has 185975 states and 564688 transitions. [2021-03-10 21:30:46,476 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:46,476 INFO L276 IsEmpty]: Start isEmpty. Operand 185975 states and 564688 transitions. [2021-03-10 21:30:46,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:30:46,563 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:46,563 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:46,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21843 [2021-03-10 21:30:46,763 INFO L428 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:46,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:46,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1627186836, now seen corresponding path program 451 times [2021-03-10 21:30:46,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:46,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737237466] [2021-03-10 21:30:46,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:46,869 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:46,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737237466] [2021-03-10 21:30:46,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493158892] [2021-03-10 21:30:46,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:46,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:46,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:30:46,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:46,954 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:46,954 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:46,954 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-03-10 21:30:46,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030531429] [2021-03-10 21:30:46,955 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:30:46,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:46,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:30:46,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:30:46,955 INFO L87 Difference]: Start difference. First operand 185975 states and 564688 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:48,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:48,475 INFO L93 Difference]: Finished difference Result 189635 states and 574166 transitions. [2021-03-10 21:30:48,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:30:48,476 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:30:48,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:48,922 INFO L225 Difference]: With dead ends: 189635 [2021-03-10 21:30:48,922 INFO L226 Difference]: Without dead ends: 189635 [2021-03-10 21:30:48,922 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 199.8ms TimeCoverageRelationStatistics Valid=295, Invalid=575, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:30:49,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189635 states. [2021-03-10 21:30:52,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189635 to 184848. [2021-03-10 21:30:52,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184848 states, 184847 states have (on average 3.036094716170671) internal successors, (561213), 184847 states have internal predecessors, (561213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:53,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184848 states to 184848 states and 561213 transitions. [2021-03-10 21:30:53,129 INFO L78 Accepts]: Start accepts. Automaton has 184848 states and 561213 transitions. Word has length 25 [2021-03-10 21:30:53,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:30:53,130 INFO L480 AbstractCegarLoop]: Abstraction has 184848 states and 561213 transitions. [2021-03-10 21:30:53,130 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:53,130 INFO L276 IsEmpty]: Start isEmpty. Operand 184848 states and 561213 transitions. [2021-03-10 21:30:53,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:30:53,210 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:30:53,210 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:30:53,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21844,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:53,410 INFO L428 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:30:53,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:30:53,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1400323282, now seen corresponding path program 452 times [2021-03-10 21:30:53,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:30:53,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248981615] [2021-03-10 21:30:53,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:30:53,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:30:53,520 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:53,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248981615] [2021-03-10 21:30:53,521 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861431532] [2021-03-10 21:30:53,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:30:53,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:30:53,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:30:53,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:30:53,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:30:53,604 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:30:53,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:30:53,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-03-10 21:30:53,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1423230372] [2021-03-10 21:30:53,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:30:53,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:30:53,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:30:53,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:30:53,605 INFO L87 Difference]: Start difference. First operand 184848 states and 561213 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:30:55,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:30:55,532 INFO L93 Difference]: Finished difference Result 276211 states and 836546 transitions. [2021-03-10 21:30:55,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:30:55,533 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:30:55,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:30:56,203 INFO L225 Difference]: With dead ends: 276211 [2021-03-10 21:30:56,204 INFO L226 Difference]: Without dead ends: 276211 [2021-03-10 21:30:56,204 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 432 ImplicationChecksByTransitivity, 311.8ms TimeCoverageRelationStatistics Valid=535, Invalid=1025, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:30:57,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276211 states. [2021-03-10 21:31:01,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276211 to 269074. [2021-03-10 21:31:02,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269074 states, 269073 states have (on average 3.036577434376545) internal successors, (817061), 269073 states have internal predecessors, (817061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:02,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269074 states to 269074 states and 817061 transitions. [2021-03-10 21:31:02,998 INFO L78 Accepts]: Start accepts. Automaton has 269074 states and 817061 transitions. Word has length 25 [2021-03-10 21:31:02,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:02,998 INFO L480 AbstractCegarLoop]: Abstraction has 269074 states and 817061 transitions. [2021-03-10 21:31:02,999 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:02,999 INFO L276 IsEmpty]: Start isEmpty. Operand 269074 states and 817061 transitions. [2021-03-10 21:31:03,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:31:03,098 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:03,098 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:03,299 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21845 [2021-03-10 21:31:03,299 INFO L428 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:03,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:03,299 INFO L82 PathProgramCache]: Analyzing trace with hash -239563868, now seen corresponding path program 453 times [2021-03-10 21:31:03,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:03,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715870787] [2021-03-10 21:31:03,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:03,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:03,405 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:03,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715870787] [2021-03-10 21:31:03,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719240476] [2021-03-10 21:31:03,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:03,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 21:31:03,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:03,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:31:03,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:03,492 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:03,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:03,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-03-10 21:31:03,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002066880] [2021-03-10 21:31:03,493 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:31:03,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:03,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:31:03,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:31:03,493 INFO L87 Difference]: Start difference. First operand 269074 states and 817061 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:05,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:05,531 INFO L93 Difference]: Finished difference Result 315035 states and 954004 transitions. [2021-03-10 21:31:05,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:31:05,531 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:31:05,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:06,257 INFO L225 Difference]: With dead ends: 315035 [2021-03-10 21:31:06,257 INFO L226 Difference]: Without dead ends: 315035 [2021-03-10 21:31:06,257 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 222.6ms TimeCoverageRelationStatistics Valid=369, Invalid=687, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:31:07,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315035 states. [2021-03-10 21:31:10,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315035 to 143842. [2021-03-10 21:31:10,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143842 states, 143841 states have (on average 3.0134732100027115) internal successors, (433461), 143841 states have internal predecessors, (433461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:11,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143842 states to 143842 states and 433461 transitions. [2021-03-10 21:31:11,272 INFO L78 Accepts]: Start accepts. Automaton has 143842 states and 433461 transitions. Word has length 25 [2021-03-10 21:31:11,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:11,272 INFO L480 AbstractCegarLoop]: Abstraction has 143842 states and 433461 transitions. [2021-03-10 21:31:11,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:11,272 INFO L276 IsEmpty]: Start isEmpty. Operand 143842 states and 433461 transitions. [2021-03-10 21:31:11,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:31:11,351 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:11,351 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:11,552 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 455 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21846 [2021-03-10 21:31:11,552 INFO L428 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:11,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:11,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1904292324, now seen corresponding path program 454 times [2021-03-10 21:31:11,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:11,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057630351] [2021-03-10 21:31:11,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:11,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:11,634 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:31:11,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057630351] [2021-03-10 21:31:11,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [517275096] [2021-03-10 21:31:11,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:11,655 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:31:11,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:11,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:31:11,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 38 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:31:11,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:11,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:31:11,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708047236] [2021-03-10 21:31:11,719 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:31:11,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:11,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:31:11,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:31:11,719 INFO L87 Difference]: Start difference. First operand 143842 states and 433461 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:12,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:12,445 INFO L93 Difference]: Finished difference Result 173347 states and 520424 transitions. [2021-03-10 21:31:12,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:31:12,446 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:31:12,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:13,444 INFO L225 Difference]: With dead ends: 173347 [2021-03-10 21:31:13,444 INFO L226 Difference]: Without dead ends: 173347 [2021-03-10 21:31:13,444 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 141.6ms TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:31:13,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173347 states. [2021-03-10 21:31:16,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173347 to 144026. [2021-03-10 21:31:16,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144026 states, 144025 states have (on average 3.0132685297691375) internal successors, (433986), 144025 states have internal predecessors, (433986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:17,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144026 states to 144026 states and 433986 transitions. [2021-03-10 21:31:17,199 INFO L78 Accepts]: Start accepts. Automaton has 144026 states and 433986 transitions. Word has length 25 [2021-03-10 21:31:17,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:17,199 INFO L480 AbstractCegarLoop]: Abstraction has 144026 states and 433986 transitions. [2021-03-10 21:31:17,199 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:17,199 INFO L276 IsEmpty]: Start isEmpty. Operand 144026 states and 433986 transitions. [2021-03-10 21:31:17,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:31:17,280 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:17,280 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:17,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21847,456 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:17,480 INFO L428 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:17,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:17,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1852819394, now seen corresponding path program 455 times [2021-03-10 21:31:17,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:17,481 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205888694] [2021-03-10 21:31:17,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:17,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:17,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205888694] [2021-03-10 21:31:17,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528738544] [2021-03-10 21:31:17,578 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:17,600 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:31:17,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:17,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:31:17,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:17,665 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 35 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:17,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:17,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-03-10 21:31:17,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800232946] [2021-03-10 21:31:17,666 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:31:17,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:17,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:31:17,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:31:17,666 INFO L87 Difference]: Start difference. First operand 144026 states and 433986 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:18,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:18,387 INFO L93 Difference]: Finished difference Result 165051 states and 495636 transitions. [2021-03-10 21:31:18,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:31:18,388 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:31:18,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:18,750 INFO L225 Difference]: With dead ends: 165051 [2021-03-10 21:31:18,750 INFO L226 Difference]: Without dead ends: 165051 [2021-03-10 21:31:18,750 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 155.8ms TimeCoverageRelationStatistics Valid=214, Invalid=386, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:31:18,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165051 states. [2021-03-10 21:31:21,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165051 to 98547. [2021-03-10 21:31:21,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98547 states, 98546 states have (on average 3.001745377793112) internal successors, (295810), 98546 states have internal predecessors, (295810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:21,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98547 states to 98547 states and 295810 transitions. [2021-03-10 21:31:21,720 INFO L78 Accepts]: Start accepts. Automaton has 98547 states and 295810 transitions. Word has length 25 [2021-03-10 21:31:21,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:21,720 INFO L480 AbstractCegarLoop]: Abstraction has 98547 states and 295810 transitions. [2021-03-10 21:31:21,720 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:21,720 INFO L276 IsEmpty]: Start isEmpty. Operand 98547 states and 295810 transitions. [2021-03-10 21:31:21,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:31:21,773 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:21,773 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:21,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21848,457 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:21,974 INFO L428 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:21,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:21,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1935801636, now seen corresponding path program 456 times [2021-03-10 21:31:21,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:21,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590208868] [2021-03-10 21:31:21,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:21,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:31:22,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590208868] [2021-03-10 21:31:22,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499091097] [2021-03-10 21:31:22,062 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:22,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:31:22,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:22,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:31:22,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:22,498 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:31:22,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:22,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-03-10 21:31:22,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692594941] [2021-03-10 21:31:22,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:31:22,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:22,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:31:22,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:31:22,499 INFO L87 Difference]: Start difference. First operand 98547 states and 295810 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:23,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:23,137 INFO L93 Difference]: Finished difference Result 159493 states and 478171 transitions. [2021-03-10 21:31:23,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:31:23,138 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:31:23,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:23,483 INFO L225 Difference]: With dead ends: 159493 [2021-03-10 21:31:23,483 INFO L226 Difference]: Without dead ends: 159493 [2021-03-10 21:31:23,484 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 140.4ms TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:23,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159493 states. [2021-03-10 21:31:26,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159493 to 140825. [2021-03-10 21:31:26,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140825 states, 140824 states have (on average 3.008095211043572) internal successors, (423612), 140824 states have internal predecessors, (423612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:26,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140825 states to 140825 states and 423612 transitions. [2021-03-10 21:31:26,573 INFO L78 Accepts]: Start accepts. Automaton has 140825 states and 423612 transitions. Word has length 25 [2021-03-10 21:31:26,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:26,573 INFO L480 AbstractCegarLoop]: Abstraction has 140825 states and 423612 transitions. [2021-03-10 21:31:26,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:26,573 INFO L276 IsEmpty]: Start isEmpty. Operand 140825 states and 423612 transitions. [2021-03-10 21:31:27,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:31:27,110 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:27,110 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:27,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21849,458 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:27,319 INFO L428 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:27,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:27,319 INFO L82 PathProgramCache]: Analyzing trace with hash -876030722, now seen corresponding path program 457 times [2021-03-10 21:31:27,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:27,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206156534] [2021-03-10 21:31:27,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:27,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:27,426 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:27,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206156534] [2021-03-10 21:31:27,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497917390] [2021-03-10 21:31:27,426 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:27,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:27,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:31:27,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:27,511 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:27,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:27,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-03-10 21:31:27,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120269144] [2021-03-10 21:31:27,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:31:27,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:27,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:31:27,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:31:27,512 INFO L87 Difference]: Start difference. First operand 140825 states and 423612 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:28,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:28,235 INFO L93 Difference]: Finished difference Result 166578 states and 499146 transitions. [2021-03-10 21:31:28,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:31:28,236 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:31:28,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:28,604 INFO L225 Difference]: With dead ends: 166578 [2021-03-10 21:31:28,604 INFO L226 Difference]: Without dead ends: 166578 [2021-03-10 21:31:28,605 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 193.7ms TimeCoverageRelationStatistics Valid=294, Invalid=576, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:31:28,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166578 states. [2021-03-10 21:31:31,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166578 to 88690. [2021-03-10 21:31:31,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88690 states, 88689 states have (on average 2.996685045496059) internal successors, (265773), 88689 states have internal predecessors, (265773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:31,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88690 states to 88690 states and 265773 transitions. [2021-03-10 21:31:31,386 INFO L78 Accepts]: Start accepts. Automaton has 88690 states and 265773 transitions. Word has length 25 [2021-03-10 21:31:31,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:31,386 INFO L480 AbstractCegarLoop]: Abstraction has 88690 states and 265773 transitions. [2021-03-10 21:31:31,386 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:31,386 INFO L276 IsEmpty]: Start isEmpty. Operand 88690 states and 265773 transitions. [2021-03-10 21:31:31,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:31:31,433 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:31,433 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:31,634 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21850,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:31,634 INFO L428 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:31,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:31,634 INFO L82 PathProgramCache]: Analyzing trace with hash -2143487900, now seen corresponding path program 458 times [2021-03-10 21:31:31,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:31,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772873564] [2021-03-10 21:31:31,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:31,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:31,747 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:31,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772873564] [2021-03-10 21:31:31,748 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127860881] [2021-03-10 21:31:31,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:31,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:31:31,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:31,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:31:31,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:31,832 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:31,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:31,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-03-10 21:31:31,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280444569] [2021-03-10 21:31:31,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:31:31,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:31,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:31:31,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:31:31,833 INFO L87 Difference]: Start difference. First operand 88690 states and 265773 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:33,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:33,059 INFO L93 Difference]: Finished difference Result 132265 states and 395319 transitions. [2021-03-10 21:31:33,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:31:33,059 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:31:33,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:33,362 INFO L225 Difference]: With dead ends: 132265 [2021-03-10 21:31:33,362 INFO L226 Difference]: Without dead ends: 132265 [2021-03-10 21:31:33,362 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 321.7ms TimeCoverageRelationStatistics Valid=534, Invalid=1026, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:31:33,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132265 states. [2021-03-10 21:31:35,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132265 to 75005. [2021-03-10 21:31:35,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75005 states, 75004 states have (on average 3.0035331448989386) internal successors, (225277), 75004 states have internal predecessors, (225277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:35,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75005 states to 75005 states and 225277 transitions. [2021-03-10 21:31:35,344 INFO L78 Accepts]: Start accepts. Automaton has 75005 states and 225277 transitions. Word has length 25 [2021-03-10 21:31:35,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:35,344 INFO L480 AbstractCegarLoop]: Abstraction has 75005 states and 225277 transitions. [2021-03-10 21:31:35,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:35,344 INFO L276 IsEmpty]: Start isEmpty. Operand 75005 states and 225277 transitions. [2021-03-10 21:31:35,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:31:35,395 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:35,395 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:35,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21851,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:35,595 INFO L428 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:35,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:35,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1062601334, now seen corresponding path program 459 times [2021-03-10 21:31:35,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:35,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188547673] [2021-03-10 21:31:35,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:35,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:35,965 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification that was a NOOP. DAG size: 7 [2021-03-10 21:31:36,017 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:31:36,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188547673] [2021-03-10 21:31:36,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293883178] [2021-03-10 21:31:36,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:36,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:31:36,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:36,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:31:36,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:36,126 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:31:36,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:36,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-03-10 21:31:36,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779403389] [2021-03-10 21:31:36,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:31:36,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:36,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:31:36,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:31:36,127 INFO L87 Difference]: Start difference. First operand 75005 states and 225277 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:36,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:36,483 INFO L93 Difference]: Finished difference Result 75445 states and 225722 transitions. [2021-03-10 21:31:36,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:31:36,484 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:31:36,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:36,623 INFO L225 Difference]: With dead ends: 75445 [2021-03-10 21:31:36,623 INFO L226 Difference]: Without dead ends: 75443 [2021-03-10 21:31:36,623 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 462.5ms TimeCoverageRelationStatistics Valid=167, Invalid=339, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:31:36,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75443 states. [2021-03-10 21:31:37,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75443 to 74587. [2021-03-10 21:31:37,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74587 states, 74586 states have (on average 3.0023462848255704) internal successors, (223933), 74586 states have internal predecessors, (223933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:38,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74587 states to 74587 states and 223933 transitions. [2021-03-10 21:31:38,109 INFO L78 Accepts]: Start accepts. Automaton has 74587 states and 223933 transitions. Word has length 25 [2021-03-10 21:31:38,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:38,109 INFO L480 AbstractCegarLoop]: Abstraction has 74587 states and 223933 transitions. [2021-03-10 21:31:38,109 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:38,109 INFO L276 IsEmpty]: Start isEmpty. Operand 74587 states and 223933 transitions. [2021-03-10 21:31:38,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:31:38,158 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:38,158 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:38,358 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21852 [2021-03-10 21:31:38,359 INFO L428 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:38,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:38,359 INFO L82 PathProgramCache]: Analyzing trace with hash 420533604, now seen corresponding path program 460 times [2021-03-10 21:31:38,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:38,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360197803] [2021-03-10 21:31:38,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:38,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:38,470 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:38,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360197803] [2021-03-10 21:31:38,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313552711] [2021-03-10 21:31:38,470 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:38,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:31:38,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:38,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:31:38,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:38,564 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:38,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:38,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-03-10 21:31:38,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274635805] [2021-03-10 21:31:38,565 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:31:38,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:38,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:31:38,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:31:38,565 INFO L87 Difference]: Start difference. First operand 74587 states and 223933 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:39,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:39,245 INFO L93 Difference]: Finished difference Result 83574 states and 249816 transitions. [2021-03-10 21:31:39,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:31:39,246 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:31:39,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:39,405 INFO L225 Difference]: With dead ends: 83574 [2021-03-10 21:31:39,406 INFO L226 Difference]: Without dead ends: 83574 [2021-03-10 21:31:39,406 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 204.6ms TimeCoverageRelationStatistics Valid=297, Invalid=573, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:31:39,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83574 states. [2021-03-10 21:31:40,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83574 to 52866. [2021-03-10 21:31:40,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52866 states, 52865 states have (on average 2.989047574009269) internal successors, (158016), 52865 states have internal predecessors, (158016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:40,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52866 states to 52866 states and 158016 transitions. [2021-03-10 21:31:40,703 INFO L78 Accepts]: Start accepts. Automaton has 52866 states and 158016 transitions. Word has length 25 [2021-03-10 21:31:40,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:40,704 INFO L480 AbstractCegarLoop]: Abstraction has 52866 states and 158016 transitions. [2021-03-10 21:31:40,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:40,704 INFO L276 IsEmpty]: Start isEmpty. Operand 52866 states and 158016 transitions. [2021-03-10 21:31:40,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:31:40,743 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:40,743 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:40,943 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21853 [2021-03-10 21:31:40,944 INFO L428 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:40,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:40,944 INFO L82 PathProgramCache]: Analyzing trace with hash -846923574, now seen corresponding path program 461 times [2021-03-10 21:31:40,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:40,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412423538] [2021-03-10 21:31:40,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:40,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:41,062 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:41,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412423538] [2021-03-10 21:31:41,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799366021] [2021-03-10 21:31:41,062 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:41,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:31:41,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:41,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:31:41,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:41,166 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:41,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:41,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-03-10 21:31:41,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906361086] [2021-03-10 21:31:41,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:31:41,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:41,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:31:41,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:31:41,166 INFO L87 Difference]: Start difference. First operand 52866 states and 158016 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:41,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:41,760 INFO L93 Difference]: Finished difference Result 78034 states and 231687 transitions. [2021-03-10 21:31:41,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:31:41,761 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:31:41,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:41,915 INFO L225 Difference]: With dead ends: 78034 [2021-03-10 21:31:41,915 INFO L226 Difference]: Without dead ends: 78034 [2021-03-10 21:31:41,915 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 323.6ms TimeCoverageRelationStatistics Valid=541, Invalid=1019, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 21:31:41,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78034 states. [2021-03-10 21:31:43,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78034 to 41286. [2021-03-10 21:31:43,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41286 states, 41285 states have (on average 2.9907714666343708) internal successors, (123474), 41285 states have internal predecessors, (123474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:43,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41286 states to 41286 states and 123474 transitions. [2021-03-10 21:31:43,160 INFO L78 Accepts]: Start accepts. Automaton has 41286 states and 123474 transitions. Word has length 25 [2021-03-10 21:31:43,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:43,160 INFO L480 AbstractCegarLoop]: Abstraction has 41286 states and 123474 transitions. [2021-03-10 21:31:43,160 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:43,160 INFO L276 IsEmpty]: Start isEmpty. Operand 41286 states and 123474 transitions. [2021-03-10 21:31:43,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:31:43,196 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:43,196 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:43,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21854,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:43,396 INFO L428 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:43,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:43,397 INFO L82 PathProgramCache]: Analyzing trace with hash -41716956, now seen corresponding path program 462 times [2021-03-10 21:31:43,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:43,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639866195] [2021-03-10 21:31:43,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:43,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:43,467 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:31:43,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639866195] [2021-03-10 21:31:43,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960715884] [2021-03-10 21:31:43,467 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:43,489 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:31:43,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:43,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:31:43,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:43,550 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 42 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:31:43,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:43,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-03-10 21:31:43,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588744847] [2021-03-10 21:31:43,550 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:31:43,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:43,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:31:43,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:31:43,551 INFO L87 Difference]: Start difference. First operand 41286 states and 123474 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:44,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:44,073 INFO L93 Difference]: Finished difference Result 41661 states and 123915 transitions. [2021-03-10 21:31:44,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:31:44,074 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:31:44,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:44,125 INFO L225 Difference]: With dead ends: 41661 [2021-03-10 21:31:44,125 INFO L226 Difference]: Without dead ends: 41657 [2021-03-10 21:31:44,125 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 152.8ms TimeCoverageRelationStatistics Valid=210, Invalid=390, Unknown=0, NotChecked=0, Total=600 [2021-03-10 21:31:44,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41657 states. [2021-03-10 21:31:44,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41657 to 41286. [2021-03-10 21:31:44,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41286 states, 41285 states have (on average 2.9906503572726173) internal successors, (123469), 41285 states have internal predecessors, (123469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:44,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41286 states to 41286 states and 123469 transitions. [2021-03-10 21:31:44,772 INFO L78 Accepts]: Start accepts. Automaton has 41286 states and 123469 transitions. Word has length 25 [2021-03-10 21:31:44,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:44,772 INFO L480 AbstractCegarLoop]: Abstraction has 41286 states and 123469 transitions. [2021-03-10 21:31:44,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:44,772 INFO L276 IsEmpty]: Start isEmpty. Operand 41286 states and 123469 transitions. [2021-03-10 21:31:44,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:31:44,808 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:44,808 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:45,008 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21855 [2021-03-10 21:31:45,009 INFO L428 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:45,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:45,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1688753060, now seen corresponding path program 463 times [2021-03-10 21:31:45,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:45,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845025193] [2021-03-10 21:31:45,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:45,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:45,124 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:45,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845025193] [2021-03-10 21:31:45,125 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343878179] [2021-03-10 21:31:45,125 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:45,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:45,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:31:45,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:45,211 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:45,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:45,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-03-10 21:31:45,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173954068] [2021-03-10 21:31:45,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:31:45,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:45,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:31:45,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:31:45,212 INFO L87 Difference]: Start difference. First operand 41286 states and 123469 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:45,509 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-03-10 21:31:45,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:45,839 INFO L93 Difference]: Finished difference Result 67989 states and 201876 transitions. [2021-03-10 21:31:45,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:31:45,840 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:31:45,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:45,965 INFO L225 Difference]: With dead ends: 67989 [2021-03-10 21:31:45,965 INFO L226 Difference]: Without dead ends: 67989 [2021-03-10 21:31:45,965 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 402.2ms TimeCoverageRelationStatistics Valid=460, Invalid=872, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:31:46,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67989 states. [2021-03-10 21:31:46,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67989 to 60015. [2021-03-10 21:31:47,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60015 states, 60014 states have (on average 2.994384643583164) internal successors, (179705), 60014 states have internal predecessors, (179705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:47,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60015 states to 60015 states and 179705 transitions. [2021-03-10 21:31:47,182 INFO L78 Accepts]: Start accepts. Automaton has 60015 states and 179705 transitions. Word has length 25 [2021-03-10 21:31:47,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:47,182 INFO L480 AbstractCegarLoop]: Abstraction has 60015 states and 179705 transitions. [2021-03-10 21:31:47,183 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:47,183 INFO L276 IsEmpty]: Start isEmpty. Operand 60015 states and 179705 transitions. [2021-03-10 21:31:47,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:31:47,229 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:47,229 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:47,429 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21856,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:47,429 INFO L428 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:47,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:47,429 INFO L82 PathProgramCache]: Analyzing trace with hash 963120774, now seen corresponding path program 464 times [2021-03-10 21:31:47,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:47,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493622266] [2021-03-10 21:31:47,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:47,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:47,506 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:47,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493622266] [2021-03-10 21:31:47,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689017838] [2021-03-10 21:31:47,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:47,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:31:47,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:47,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:31:47,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:47,584 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:31:47,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:47,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:31:47,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141351879] [2021-03-10 21:31:47,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:31:47,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:47,585 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:31:47,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:31:47,585 INFO L87 Difference]: Start difference. First operand 60015 states and 179705 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:47,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:47,989 INFO L93 Difference]: Finished difference Result 60480 states and 180320 transitions. [2021-03-10 21:31:47,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:31:47,990 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:31:47,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:48,097 INFO L225 Difference]: With dead ends: 60480 [2021-03-10 21:31:48,097 INFO L226 Difference]: Without dead ends: 60476 [2021-03-10 21:31:48,097 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 157.7ms TimeCoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:31:48,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60476 states. [2021-03-10 21:31:49,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60476 to 60031. [2021-03-10 21:31:49,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60031 states, 60030 states have (on average 2.9940029985007497) internal successors, (179730), 60030 states have internal predecessors, (179730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:49,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60031 states to 60031 states and 179730 transitions. [2021-03-10 21:31:49,369 INFO L78 Accepts]: Start accepts. Automaton has 60031 states and 179730 transitions. Word has length 25 [2021-03-10 21:31:49,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:49,369 INFO L480 AbstractCegarLoop]: Abstraction has 60031 states and 179730 transitions. [2021-03-10 21:31:49,369 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:49,369 INFO L276 IsEmpty]: Start isEmpty. Operand 60031 states and 179730 transitions. [2021-03-10 21:31:49,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:31:49,413 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:49,413 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:49,613 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21857,466 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:49,614 INFO L428 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:49,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:49,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1614097462, now seen corresponding path program 465 times [2021-03-10 21:31:49,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:49,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588301388] [2021-03-10 21:31:49,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:49,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:49,684 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:49,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588301388] [2021-03-10 21:31:49,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591591033] [2021-03-10 21:31:49,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:49,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:31:49,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:49,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:31:49,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:49,767 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 39 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:49,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:49,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:31:49,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314142570] [2021-03-10 21:31:49,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:31:49,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:49,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:31:49,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:31:49,768 INFO L87 Difference]: Start difference. First operand 60031 states and 179730 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:50,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:50,437 INFO L93 Difference]: Finished difference Result 65631 states and 195205 transitions. [2021-03-10 21:31:50,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:31:50,438 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:31:50,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:50,561 INFO L225 Difference]: With dead ends: 65631 [2021-03-10 21:31:50,561 INFO L226 Difference]: Without dead ends: 65631 [2021-03-10 21:31:50,561 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 107.6ms TimeCoverageRelationStatistics Valid=170, Invalid=250, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:31:50,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65631 states. [2021-03-10 21:31:51,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65631 to 60041. [2021-03-10 21:31:51,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60041 states, 60040 states have (on average 2.9939373750832776) internal successors, (179756), 60040 states have internal predecessors, (179756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:52,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60041 states to 60041 states and 179756 transitions. [2021-03-10 21:31:52,011 INFO L78 Accepts]: Start accepts. Automaton has 60041 states and 179756 transitions. Word has length 25 [2021-03-10 21:31:52,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:52,011 INFO L480 AbstractCegarLoop]: Abstraction has 60041 states and 179756 transitions. [2021-03-10 21:31:52,011 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:52,011 INFO L276 IsEmpty]: Start isEmpty. Operand 60041 states and 179756 transitions. [2021-03-10 21:31:52,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:31:52,056 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:52,056 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:52,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21858,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:52,256 INFO L428 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:52,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:52,256 INFO L82 PathProgramCache]: Analyzing trace with hash 951822500, now seen corresponding path program 466 times [2021-03-10 21:31:52,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:52,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087959305] [2021-03-10 21:31:52,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:52,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:52,331 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:31:52,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087959305] [2021-03-10 21:31:52,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94144996] [2021-03-10 21:31:52,331 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:52,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:31:52,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:52,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:31:52,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:52,420 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 36 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:31:52,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:52,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:31:52,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752467668] [2021-03-10 21:31:52,420 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:31:52,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:52,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:31:52,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:31:52,421 INFO L87 Difference]: Start difference. First operand 60041 states and 179756 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:52,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:52,803 INFO L93 Difference]: Finished difference Result 70196 states and 208624 transitions. [2021-03-10 21:31:52,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:31:52,804 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:31:52,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:52,938 INFO L225 Difference]: With dead ends: 70196 [2021-03-10 21:31:52,938 INFO L226 Difference]: Without dead ends: 70196 [2021-03-10 21:31:52,938 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 152.0ms TimeCoverageRelationStatistics Valid=248, Invalid=402, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:31:52,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70196 states. [2021-03-10 21:31:54,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70196 to 60079. [2021-03-10 21:31:54,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60079 states, 60078 states have (on average 2.9939412097606444) internal successors, (179870), 60078 states have internal predecessors, (179870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:54,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60079 states to 60079 states and 179870 transitions. [2021-03-10 21:31:54,317 INFO L78 Accepts]: Start accepts. Automaton has 60079 states and 179870 transitions. Word has length 25 [2021-03-10 21:31:54,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:54,317 INFO L480 AbstractCegarLoop]: Abstraction has 60079 states and 179870 transitions. [2021-03-10 21:31:54,317 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:54,317 INFO L276 IsEmpty]: Start isEmpty. Operand 60079 states and 179870 transitions. [2021-03-10 21:31:54,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:31:54,362 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:54,362 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:54,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21859,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:54,562 INFO L428 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:54,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:54,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1109037302, now seen corresponding path program 467 times [2021-03-10 21:31:54,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:54,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809110440] [2021-03-10 21:31:54,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:54,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:54,650 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:54,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809110440] [2021-03-10 21:31:54,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1749156471] [2021-03-10 21:31:54,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:54,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:31:54,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:54,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:31:54,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:54,748 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 34 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:31:54,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:54,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:31:54,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334433146] [2021-03-10 21:31:54,749 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:31:54,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:54,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:31:54,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=179, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:31:54,749 INFO L87 Difference]: Start difference. First operand 60079 states and 179870 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:55,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:55,423 INFO L93 Difference]: Finished difference Result 72590 states and 215734 transitions. [2021-03-10 21:31:55,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:31:55,424 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:31:55,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:55,561 INFO L225 Difference]: With dead ends: 72590 [2021-03-10 21:31:55,561 INFO L226 Difference]: Without dead ends: 72590 [2021-03-10 21:31:55,561 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 442.9ms TimeCoverageRelationStatistics Valid=302, Invalid=510, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:31:55,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72590 states. [2021-03-10 21:31:56,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72590 to 59829. [2021-03-10 21:31:56,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59829 states, 59828 states have (on average 2.9930968777161198) internal successors, (179071), 59828 states have internal predecessors, (179071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:56,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59829 states to 59829 states and 179071 transitions. [2021-03-10 21:31:56,864 INFO L78 Accepts]: Start accepts. Automaton has 59829 states and 179071 transitions. Word has length 25 [2021-03-10 21:31:56,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:56,864 INFO L480 AbstractCegarLoop]: Abstraction has 59829 states and 179071 transitions. [2021-03-10 21:31:56,864 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:56,864 INFO L276 IsEmpty]: Start isEmpty. Operand 59829 states and 179071 transitions. [2021-03-10 21:31:56,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:31:56,906 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:56,906 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:31:57,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21860,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:57,106 INFO L428 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:31:57,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:31:57,106 INFO L82 PathProgramCache]: Analyzing trace with hash -571181724, now seen corresponding path program 468 times [2021-03-10 21:31:57,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:31:57,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817709996] [2021-03-10 21:31:57,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:31:57,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:31:57,197 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:31:57,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817709996] [2021-03-10 21:31:57,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96498522] [2021-03-10 21:31:57,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:31:57,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:31:57,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:31:57,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:31:57,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:31:57,291 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:31:57,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:31:57,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:31:57,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229882151] [2021-03-10 21:31:57,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:31:57,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:31:57,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:31:57,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:31:57,292 INFO L87 Difference]: Start difference. First operand 59829 states and 179071 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:57,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:31:57,770 INFO L93 Difference]: Finished difference Result 93593 states and 280293 transitions. [2021-03-10 21:31:57,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:31:57,771 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:31:57,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:31:57,955 INFO L225 Difference]: With dead ends: 93593 [2021-03-10 21:31:57,955 INFO L226 Difference]: Without dead ends: 93593 [2021-03-10 21:31:57,955 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 193.4ms TimeCoverageRelationStatistics Valid=293, Invalid=519, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:31:58,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93593 states. [2021-03-10 21:31:59,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93593 to 82993. [2021-03-10 21:31:59,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82993 states, 82992 states have (on average 3.016278677462888) internal successors, (250327), 82992 states have internal predecessors, (250327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:59,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82993 states to 82993 states and 250327 transitions. [2021-03-10 21:31:59,863 INFO L78 Accepts]: Start accepts. Automaton has 82993 states and 250327 transitions. Word has length 25 [2021-03-10 21:31:59,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:31:59,863 INFO L480 AbstractCegarLoop]: Abstraction has 82993 states and 250327 transitions. [2021-03-10 21:31:59,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:31:59,864 INFO L276 IsEmpty]: Start isEmpty. Operand 82993 states and 250327 transitions. [2021-03-10 21:31:59,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:31:59,916 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:31:59,916 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:00,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21861 [2021-03-10 21:32:00,117 INFO L428 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:00,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:00,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1077527990, now seen corresponding path program 469 times [2021-03-10 21:32:00,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:00,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697239601] [2021-03-10 21:32:00,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:00,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:00,219 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:00,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697239601] [2021-03-10 21:32:00,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706280759] [2021-03-10 21:32:00,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:00,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:00,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:32:00,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:00,314 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:00,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:00,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-03-10 21:32:00,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365334032] [2021-03-10 21:32:00,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:32:00,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:00,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:32:00,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:32:00,315 INFO L87 Difference]: Start difference. First operand 82993 states and 250327 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:00,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:00,809 INFO L93 Difference]: Finished difference Result 90382 states and 270822 transitions. [2021-03-10 21:32:00,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:32:00,810 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:32:00,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:00,987 INFO L225 Difference]: With dead ends: 90382 [2021-03-10 21:32:00,987 INFO L226 Difference]: Without dead ends: 90382 [2021-03-10 21:32:00,987 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 190.4ms TimeCoverageRelationStatistics Valid=262, Invalid=494, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:32:01,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90382 states. [2021-03-10 21:32:02,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90382 to 81151. [2021-03-10 21:32:02,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81151 states, 81150 states have (on average 3.0145532963647566) internal successors, (244631), 81150 states have internal predecessors, (244631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:03,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81151 states to 81151 states and 244631 transitions. [2021-03-10 21:32:03,026 INFO L78 Accepts]: Start accepts. Automaton has 81151 states and 244631 transitions. Word has length 25 [2021-03-10 21:32:03,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:03,026 INFO L480 AbstractCegarLoop]: Abstraction has 81151 states and 244631 transitions. [2021-03-10 21:32:03,026 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:03,026 INFO L276 IsEmpty]: Start isEmpty. Operand 81151 states and 244631 transitions. [2021-03-10 21:32:03,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:32:03,076 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:03,076 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:03,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21862 [2021-03-10 21:32:03,277 INFO L428 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:03,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:03,277 INFO L82 PathProgramCache]: Analyzing trace with hash 405606948, now seen corresponding path program 470 times [2021-03-10 21:32:03,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:03,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019741346] [2021-03-10 21:32:03,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:03,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:03,384 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:03,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019741346] [2021-03-10 21:32:03,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103828999] [2021-03-10 21:32:03,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:03,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:03,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:03,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:32:03,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:03,480 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:03,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:03,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-03-10 21:32:03,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263903149] [2021-03-10 21:32:03,481 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:32:03,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:03,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:32:03,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=218, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:32:03,481 INFO L87 Difference]: Start difference. First operand 81151 states and 244631 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:04,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:04,122 INFO L93 Difference]: Finished difference Result 141608 states and 426442 transitions. [2021-03-10 21:32:04,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:32:04,123 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:32:04,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:04,429 INFO L225 Difference]: With dead ends: 141608 [2021-03-10 21:32:04,429 INFO L226 Difference]: Without dead ends: 141608 [2021-03-10 21:32:04,430 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 180.1ms TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:32:04,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141608 states. [2021-03-10 21:32:06,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141608 to 133805. [2021-03-10 21:32:07,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133805 states, 133804 states have (on average 3.0223685390571284) internal successors, (404405), 133804 states have internal predecessors, (404405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:07,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133805 states to 133805 states and 404405 transitions. [2021-03-10 21:32:07,912 INFO L78 Accepts]: Start accepts. Automaton has 133805 states and 404405 transitions. Word has length 25 [2021-03-10 21:32:07,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:07,912 INFO L480 AbstractCegarLoop]: Abstraction has 133805 states and 404405 transitions. [2021-03-10 21:32:07,912 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:07,912 INFO L276 IsEmpty]: Start isEmpty. Operand 133805 states and 404405 transitions. [2021-03-10 21:32:08,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:32:08,008 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:08,008 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:08,208 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21863,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:08,209 INFO L428 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:08,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:08,209 INFO L82 PathProgramCache]: Analyzing trace with hash -861850230, now seen corresponding path program 471 times [2021-03-10 21:32:08,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:08,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284140965] [2021-03-10 21:32:08,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:08,315 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:08,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284140965] [2021-03-10 21:32:08,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204246751] [2021-03-10 21:32:08,315 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:08,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:32:08,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:08,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:32:08,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:08,409 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:08,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:08,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-03-10 21:32:08,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112092116] [2021-03-10 21:32:08,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:32:08,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:08,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:32:08,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:32:08,410 INFO L87 Difference]: Start difference. First operand 133805 states and 404405 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:09,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:09,186 INFO L93 Difference]: Finished difference Result 143196 states and 430987 transitions. [2021-03-10 21:32:09,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:32:09,187 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:32:09,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:09,519 INFO L225 Difference]: With dead ends: 143196 [2021-03-10 21:32:09,519 INFO L226 Difference]: Without dead ends: 143196 [2021-03-10 21:32:09,519 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 250.9ms TimeCoverageRelationStatistics Valid=373, Invalid=749, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:32:09,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143196 states. [2021-03-10 21:32:12,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143196 to 132675. [2021-03-10 21:32:12,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132675 states, 132674 states have (on average 3.022378160001206) internal successors, (400991), 132674 states have internal predecessors, (400991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:13,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132675 states to 132675 states and 400991 transitions. [2021-03-10 21:32:13,043 INFO L78 Accepts]: Start accepts. Automaton has 132675 states and 400991 transitions. Word has length 25 [2021-03-10 21:32:13,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:13,043 INFO L480 AbstractCegarLoop]: Abstraction has 132675 states and 400991 transitions. [2021-03-10 21:32:13,044 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:13,044 INFO L276 IsEmpty]: Start isEmpty. Operand 132675 states and 400991 transitions. [2021-03-10 21:32:13,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:32:13,193 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:13,193 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:13,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21864,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:13,413 INFO L428 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:13,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:13,413 INFO L82 PathProgramCache]: Analyzing trace with hash -1498317084, now seen corresponding path program 472 times [2021-03-10 21:32:13,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:13,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932329798] [2021-03-10 21:32:13,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:13,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:13,544 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:13,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932329798] [2021-03-10 21:32:13,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429626145] [2021-03-10 21:32:13,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:13,565 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:13,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:13,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:32:13,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:13,643 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:13,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:13,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-03-10 21:32:13,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486884692] [2021-03-10 21:32:13,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:32:13,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:13,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:32:13,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:32:13,644 INFO L87 Difference]: Start difference. First operand 132675 states and 400991 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:14,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:14,698 INFO L93 Difference]: Finished difference Result 189263 states and 569984 transitions. [2021-03-10 21:32:14,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:32:14,698 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:32:14,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:15,139 INFO L225 Difference]: With dead ends: 189263 [2021-03-10 21:32:15,139 INFO L226 Difference]: Without dead ends: 189263 [2021-03-10 21:32:15,139 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 420.3ms TimeCoverageRelationStatistics Valid=705, Invalid=1365, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 21:32:15,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189263 states. [2021-03-10 21:32:18,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189263 to 176221. [2021-03-10 21:32:18,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176221 states, 176220 states have (on average 3.024032459425718) internal successors, (532895), 176220 states have internal predecessors, (532895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:19,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176221 states to 176221 states and 532895 transitions. [2021-03-10 21:32:19,226 INFO L78 Accepts]: Start accepts. Automaton has 176221 states and 532895 transitions. Word has length 25 [2021-03-10 21:32:19,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:19,227 INFO L480 AbstractCegarLoop]: Abstraction has 176221 states and 532895 transitions. [2021-03-10 21:32:19,227 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:19,227 INFO L276 IsEmpty]: Start isEmpty. Operand 176221 states and 532895 transitions. [2021-03-10 21:32:19,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:32:19,307 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:19,307 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:19,507 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21865 [2021-03-10 21:32:19,507 INFO L428 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:19,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:19,508 INFO L82 PathProgramCache]: Analyzing trace with hash -795211182, now seen corresponding path program 473 times [2021-03-10 21:32:19,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:19,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418489292] [2021-03-10 21:32:19,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:19,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:20,231 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:20,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418489292] [2021-03-10 21:32:20,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868521011] [2021-03-10 21:32:20,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:20,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:32:20,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:20,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:32:20,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:20,353 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:20,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:20,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-03-10 21:32:20,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552232693] [2021-03-10 21:32:20,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:32:20,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:20,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:32:20,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:32:20,354 INFO L87 Difference]: Start difference. First operand 176221 states and 532895 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:21,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:21,446 INFO L93 Difference]: Finished difference Result 207060 states and 624206 transitions. [2021-03-10 21:32:21,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:32:21,447 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:32:21,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:21,946 INFO L225 Difference]: With dead ends: 207060 [2021-03-10 21:32:21,946 INFO L226 Difference]: Without dead ends: 207060 [2021-03-10 21:32:21,946 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 932.8ms TimeCoverageRelationStatistics Valid=459, Invalid=873, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:32:22,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207060 states. [2021-03-10 21:32:24,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207060 to 97070. [2021-03-10 21:32:24,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97070 states, 97069 states have (on average 3.0073864982641214) internal successors, (291924), 97069 states have internal predecessors, (291924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:25,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97070 states to 97070 states and 291924 transitions. [2021-03-10 21:32:25,485 INFO L78 Accepts]: Start accepts. Automaton has 97070 states and 291924 transitions. Word has length 25 [2021-03-10 21:32:25,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:25,485 INFO L480 AbstractCegarLoop]: Abstraction has 97070 states and 291924 transitions. [2021-03-10 21:32:25,485 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:25,485 INFO L276 IsEmpty]: Start isEmpty. Operand 97070 states and 291924 transitions. [2021-03-10 21:32:25,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:32:25,547 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:25,547 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:25,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21866,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:25,751 INFO L428 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:25,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:25,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1239821330, now seen corresponding path program 474 times [2021-03-10 21:32:25,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:25,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159724374] [2021-03-10 21:32:25,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:25,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:25,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159724374] [2021-03-10 21:32:25,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173614415] [2021-03-10 21:32:25,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:25,874 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:32:25,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:25,875 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:32:25,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:25,940 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:25,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:25,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-03-10 21:32:25,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434678248] [2021-03-10 21:32:25,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:32:25,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:25,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:32:25,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:32:25,941 INFO L87 Difference]: Start difference. First operand 97070 states and 291924 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:26,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:26,535 INFO L93 Difference]: Finished difference Result 117254 states and 351156 transitions. [2021-03-10 21:32:26,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:32:26,536 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:32:26,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:26,780 INFO L225 Difference]: With dead ends: 117254 [2021-03-10 21:32:26,780 INFO L226 Difference]: Without dead ends: 117253 [2021-03-10 21:32:26,780 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 198.6ms TimeCoverageRelationStatistics Valid=292, Invalid=520, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:32:26,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117253 states. [2021-03-10 21:32:28,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117253 to 97245. [2021-03-10 21:32:28,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97245 states, 97244 states have (on average 3.0071264036855743) internal successors, (292425), 97244 states have internal predecessors, (292425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:29,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97245 states to 97245 states and 292425 transitions. [2021-03-10 21:32:29,145 INFO L78 Accepts]: Start accepts. Automaton has 97245 states and 292425 transitions. Word has length 25 [2021-03-10 21:32:29,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:29,146 INFO L480 AbstractCegarLoop]: Abstraction has 97245 states and 292425 transitions. [2021-03-10 21:32:29,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:29,146 INFO L276 IsEmpty]: Start isEmpty. Operand 97245 states and 292425 transitions. [2021-03-10 21:32:29,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:32:29,196 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:29,197 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:29,397 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21867,476 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:29,397 INFO L428 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:29,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:29,397 INFO L82 PathProgramCache]: Analyzing trace with hash 733475064, now seen corresponding path program 475 times [2021-03-10 21:32:29,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:29,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244480884] [2021-03-10 21:32:29,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:29,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:29,499 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:29,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244480884] [2021-03-10 21:32:29,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777340166] [2021-03-10 21:32:29,499 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:29,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:29,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:32:29,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:29,588 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:29,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:29,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-03-10 21:32:29,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583164511] [2021-03-10 21:32:29,588 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:32:29,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:29,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:32:29,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:32:29,589 INFO L87 Difference]: Start difference. First operand 97245 states and 292425 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:30,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:30,161 INFO L93 Difference]: Finished difference Result 110340 states and 330613 transitions. [2021-03-10 21:32:30,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:32:30,162 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:32:30,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:30,387 INFO L225 Difference]: With dead ends: 110340 [2021-03-10 21:32:30,387 INFO L226 Difference]: Without dead ends: 110339 [2021-03-10 21:32:30,387 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 180.8ms TimeCoverageRelationStatistics Valid=261, Invalid=495, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:32:30,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110339 states. [2021-03-10 21:32:32,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110339 to 68102. [2021-03-10 21:32:32,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68102 states, 68101 states have (on average 3.0012187779915127) internal successors, (204386), 68101 states have internal predecessors, (204386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:32,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68102 states to 68102 states and 204386 transitions. [2021-03-10 21:32:32,520 INFO L78 Accepts]: Start accepts. Automaton has 68102 states and 204386 transitions. Word has length 25 [2021-03-10 21:32:32,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:32,520 INFO L480 AbstractCegarLoop]: Abstraction has 68102 states and 204386 transitions. [2021-03-10 21:32:32,520 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:32,520 INFO L276 IsEmpty]: Start isEmpty. Operand 68102 states and 204386 transitions. [2021-03-10 21:32:32,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:32:32,566 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:32,566 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:32,766 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21868,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:32,766 INFO L428 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:32,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:32,766 INFO L82 PathProgramCache]: Analyzing trace with hash -2078357294, now seen corresponding path program 476 times [2021-03-10 21:32:32,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:32,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [362256535] [2021-03-10 21:32:32,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:32,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:32,880 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:32,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [362256535] [2021-03-10 21:32:32,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290456331] [2021-03-10 21:32:32,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:32,901 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:32,901 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:32,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:32:32,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:32,970 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:32,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:32,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-03-10 21:32:32,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083471897] [2021-03-10 21:32:32,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:32:32,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:32,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:32:32,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:32:32,971 INFO L87 Difference]: Start difference. First operand 68102 states and 204386 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:33,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:33,427 INFO L93 Difference]: Finished difference Result 95816 states and 286428 transitions. [2021-03-10 21:32:33,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:32:33,428 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:32:33,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:33,614 INFO L225 Difference]: With dead ends: 95816 [2021-03-10 21:32:33,614 INFO L226 Difference]: Without dead ends: 95815 [2021-03-10 21:32:33,615 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 178.7ms TimeCoverageRelationStatistics Valid=205, Invalid=445, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:32:33,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95815 states. [2021-03-10 21:32:35,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95815 to 81199. [2021-03-10 21:32:35,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81199 states, 81198 states have (on average 3.002746373063376) internal successors, (243817), 81198 states have internal predecessors, (243817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:35,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81199 states to 81199 states and 243817 transitions. [2021-03-10 21:32:35,695 INFO L78 Accepts]: Start accepts. Automaton has 81199 states and 243817 transitions. Word has length 25 [2021-03-10 21:32:35,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:35,695 INFO L480 AbstractCegarLoop]: Abstraction has 81199 states and 243817 transitions. [2021-03-10 21:32:35,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:35,696 INFO L276 IsEmpty]: Start isEmpty. Operand 81199 states and 243817 transitions. [2021-03-10 21:32:35,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:32:35,739 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:35,739 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:35,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21869 [2021-03-10 21:32:35,939 INFO L428 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:35,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:35,939 INFO L82 PathProgramCache]: Analyzing trace with hash 949152824, now seen corresponding path program 477 times [2021-03-10 21:32:35,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:35,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854289783] [2021-03-10 21:32:35,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:35,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:36,060 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:36,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854289783] [2021-03-10 21:32:36,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683300563] [2021-03-10 21:32:36,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:36,082 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:32:36,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:36,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:32:36,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:36,146 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:36,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:36,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-03-10 21:32:36,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702353272] [2021-03-10 21:32:36,147 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:32:36,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:36,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:32:36,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:32:36,147 INFO L87 Difference]: Start difference. First operand 81199 states and 243817 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:36,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:36,747 INFO L93 Difference]: Finished difference Result 99184 states and 296306 transitions. [2021-03-10 21:32:36,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:32:36,748 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:32:36,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:36,962 INFO L225 Difference]: With dead ends: 99184 [2021-03-10 21:32:36,962 INFO L226 Difference]: Without dead ends: 99184 [2021-03-10 21:32:36,962 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 254.0ms TimeCoverageRelationStatistics Valid=372, Invalid=750, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 21:32:37,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99184 states. [2021-03-10 21:32:38,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99184 to 51922. [2021-03-10 21:32:38,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51922 states, 51921 states have (on average 2.997496196144142) internal successors, (155633), 51921 states have internal predecessors, (155633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:38,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51922 states to 51922 states and 155633 transitions. [2021-03-10 21:32:38,877 INFO L78 Accepts]: Start accepts. Automaton has 51922 states and 155633 transitions. Word has length 25 [2021-03-10 21:32:38,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:38,877 INFO L480 AbstractCegarLoop]: Abstraction has 51922 states and 155633 transitions. [2021-03-10 21:32:38,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:38,877 INFO L276 IsEmpty]: Start isEmpty. Operand 51922 states and 155633 transitions. [2021-03-10 21:32:38,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:32:38,916 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:38,916 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:39,116 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21870 [2021-03-10 21:32:39,116 INFO L428 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:39,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:39,117 INFO L82 PathProgramCache]: Analyzing trace with hash 312685970, now seen corresponding path program 478 times [2021-03-10 21:32:39,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:39,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006915399] [2021-03-10 21:32:39,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:39,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:39,247 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:39,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006915399] [2021-03-10 21:32:39,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014153478] [2021-03-10 21:32:39,247 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:39,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:39,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:39,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:32:39,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:39,337 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:39,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:39,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-03-10 21:32:39,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328145724] [2021-03-10 21:32:39,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:32:39,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:39,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:32:39,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:32:39,338 INFO L87 Difference]: Start difference. First operand 51922 states and 155633 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:40,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:40,014 INFO L93 Difference]: Finished difference Result 71392 states and 212338 transitions. [2021-03-10 21:32:40,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 21:32:40,015 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:32:40,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:40,155 INFO L225 Difference]: With dead ends: 71392 [2021-03-10 21:32:40,155 INFO L226 Difference]: Without dead ends: 71392 [2021-03-10 21:32:40,155 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 411.9ms TimeCoverageRelationStatistics Valid=704, Invalid=1366, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 21:32:40,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71392 states. [2021-03-10 21:32:41,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71392 to 37505. [2021-03-10 21:32:41,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37505 states, 37504 states have (on average 3.01471843003413) internal successors, (113064), 37504 states have internal predecessors, (113064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:41,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37505 states to 37505 states and 113064 transitions. [2021-03-10 21:32:41,216 INFO L78 Accepts]: Start accepts. Automaton has 37505 states and 113064 transitions. Word has length 25 [2021-03-10 21:32:41,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:41,216 INFO L480 AbstractCegarLoop]: Abstraction has 37505 states and 113064 transitions. [2021-03-10 21:32:41,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:41,216 INFO L276 IsEmpty]: Start isEmpty. Operand 37505 states and 113064 transitions. [2021-03-10 21:32:41,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:32:41,248 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:41,248 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:41,448 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21871 [2021-03-10 21:32:41,448 INFO L428 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:41,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:41,448 INFO L82 PathProgramCache]: Analyzing trace with hash -539568852, now seen corresponding path program 479 times [2021-03-10 21:32:41,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:41,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440955596] [2021-03-10 21:32:41,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:41,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:41,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440955596] [2021-03-10 21:32:41,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667359482] [2021-03-10 21:32:41,563 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:41,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:32:41,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:41,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:32:41,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:41,655 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:41,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:41,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-03-10 21:32:41,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203561212] [2021-03-10 21:32:41,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:32:41,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:41,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:32:41,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:32:41,656 INFO L87 Difference]: Start difference. First operand 37505 states and 113064 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:41,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:41,926 INFO L93 Difference]: Finished difference Result 52340 states and 156866 transitions. [2021-03-10 21:32:41,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:32:41,927 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:32:41,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:42,023 INFO L225 Difference]: With dead ends: 52340 [2021-03-10 21:32:42,023 INFO L226 Difference]: Without dead ends: 52340 [2021-03-10 21:32:42,023 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 157.6ms TimeCoverageRelationStatistics Valid=174, Invalid=378, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:32:42,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52340 states. [2021-03-10 21:32:42,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52340 to 51574. [2021-03-10 21:32:42,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51574 states, 51573 states have (on average 3.01365055358424) internal successors, (155423), 51573 states have internal predecessors, (155423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:43,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51574 states to 51574 states and 155423 transitions. [2021-03-10 21:32:43,094 INFO L78 Accepts]: Start accepts. Automaton has 51574 states and 155423 transitions. Word has length 25 [2021-03-10 21:32:43,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:43,094 INFO L480 AbstractCegarLoop]: Abstraction has 51574 states and 155423 transitions. [2021-03-10 21:32:43,094 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:43,094 INFO L276 IsEmpty]: Start isEmpty. Operand 51574 states and 155423 transitions. [2021-03-10 21:32:43,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:32:43,132 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:43,132 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:43,332 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 481 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21872 [2021-03-10 21:32:43,332 INFO L428 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:43,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:43,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1807026030, now seen corresponding path program 480 times [2021-03-10 21:32:43,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:43,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958920271] [2021-03-10 21:32:43,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:43,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:43,456 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:43,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958920271] [2021-03-10 21:32:43,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376032727] [2021-03-10 21:32:43,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:43,478 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:32:43,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:43,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:32:43,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:43,545 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:43,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:43,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-03-10 21:32:43,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025783851] [2021-03-10 21:32:43,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:32:43,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:43,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:32:43,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:32:43,546 INFO L87 Difference]: Start difference. First operand 51574 states and 155423 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:43,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:43,948 INFO L93 Difference]: Finished difference Result 53707 states and 160765 transitions. [2021-03-10 21:32:43,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:32:43,949 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:32:43,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:44,353 INFO L225 Difference]: With dead ends: 53707 [2021-03-10 21:32:44,353 INFO L226 Difference]: Without dead ends: 53707 [2021-03-10 21:32:44,354 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 238.4ms TimeCoverageRelationStatistics Valid=329, Invalid=663, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:32:44,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53707 states. [2021-03-10 21:32:44,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53707 to 50319. [2021-03-10 21:32:44,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50319 states, 50318 states have (on average 3.013335188203029) internal successors, (151625), 50318 states have internal predecessors, (151625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:45,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50319 states to 50319 states and 151625 transitions. [2021-03-10 21:32:45,100 INFO L78 Accepts]: Start accepts. Automaton has 50319 states and 151625 transitions. Word has length 25 [2021-03-10 21:32:45,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:45,100 INFO L480 AbstractCegarLoop]: Abstraction has 50319 states and 151625 transitions. [2021-03-10 21:32:45,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:45,100 INFO L276 IsEmpty]: Start isEmpty. Operand 50319 states and 151625 transitions. [2021-03-10 21:32:45,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:32:45,136 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:45,136 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:45,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21873 [2021-03-10 21:32:45,337 INFO L428 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:45,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:45,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1851474412, now seen corresponding path program 481 times [2021-03-10 21:32:45,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:45,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960369203] [2021-03-10 21:32:45,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:45,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:45,456 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:45,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960369203] [2021-03-10 21:32:45,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142307304] [2021-03-10 21:32:45,457 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:45,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:45,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:32:45,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:45,763 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:45,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:45,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-03-10 21:32:45,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811195728] [2021-03-10 21:32:45,764 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:32:45,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:45,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:32:45,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:32:45,764 INFO L87 Difference]: Start difference. First operand 50319 states and 151625 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:46,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:46,408 INFO L93 Difference]: Finished difference Result 83659 states and 251011 transitions. [2021-03-10 21:32:46,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:32:46,409 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:32:46,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:46,572 INFO L225 Difference]: With dead ends: 83659 [2021-03-10 21:32:46,573 INFO L226 Difference]: Without dead ends: 83659 [2021-03-10 21:32:46,573 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 554 ImplicationChecksByTransitivity, 364.6ms TimeCoverageRelationStatistics Valid=647, Invalid=1245, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 21:32:46,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83659 states. [2021-03-10 21:32:47,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83659 to 76370. [2021-03-10 21:32:47,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76370 states, 76369 states have (on average 3.019720043473137) internal successors, (230613), 76369 states have internal predecessors, (230613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:47,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76370 states to 76370 states and 230613 transitions. [2021-03-10 21:32:47,990 INFO L78 Accepts]: Start accepts. Automaton has 76370 states and 230613 transitions. Word has length 25 [2021-03-10 21:32:47,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:47,990 INFO L480 AbstractCegarLoop]: Abstraction has 76370 states and 230613 transitions. [2021-03-10 21:32:47,990 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:47,990 INFO L276 IsEmpty]: Start isEmpty. Operand 76370 states and 230613 transitions. [2021-03-10 21:32:48,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:32:48,035 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:48,035 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:48,235 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21874,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:48,235 INFO L428 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:48,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:48,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1146928558, now seen corresponding path program 482 times [2021-03-10 21:32:48,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:48,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907174403] [2021-03-10 21:32:48,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:48,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:48,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907174403] [2021-03-10 21:32:48,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781487662] [2021-03-10 21:32:48,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:48,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:32:48,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:48,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:32:48,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:48,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:48,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-03-10 21:32:48,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558038088] [2021-03-10 21:32:48,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:32:48,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:48,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:32:48,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:32:48,459 INFO L87 Difference]: Start difference. First operand 76370 states and 230613 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:49,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:49,577 INFO L93 Difference]: Finished difference Result 149041 states and 447830 transitions. [2021-03-10 21:32:49,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:32:49,578 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:32:49,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:49,913 INFO L225 Difference]: With dead ends: 149041 [2021-03-10 21:32:49,914 INFO L226 Difference]: Without dead ends: 149041 [2021-03-10 21:32:49,914 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 355.4ms TimeCoverageRelationStatistics Valid=554, Invalid=1086, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:32:50,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149041 states. [2021-03-10 21:32:52,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149041 to 142483. [2021-03-10 21:32:52,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142483 states, 142482 states have (on average 3.0140017686444605) internal successors, (429441), 142482 states have internal predecessors, (429441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:52,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142483 states to 142483 states and 429441 transitions. [2021-03-10 21:32:52,760 INFO L78 Accepts]: Start accepts. Automaton has 142483 states and 429441 transitions. Word has length 25 [2021-03-10 21:32:52,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:52,760 INFO L480 AbstractCegarLoop]: Abstraction has 142483 states and 429441 transitions. [2021-03-10 21:32:52,761 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:52,761 INFO L276 IsEmpty]: Start isEmpty. Operand 142483 states and 429441 transitions. [2021-03-10 21:32:52,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:32:52,825 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:52,825 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:53,026 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21875 [2021-03-10 21:32:53,026 INFO L428 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:53,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:53,026 INFO L82 PathProgramCache]: Analyzing trace with hash -444781362, now seen corresponding path program 483 times [2021-03-10 21:32:53,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:53,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779804946] [2021-03-10 21:32:53,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:53,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:53,109 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:32:53,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779804946] [2021-03-10 21:32:53,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269474830] [2021-03-10 21:32:53,109 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:53,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:32:53,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:53,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:32:53,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:53,196 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:53,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:53,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:32:53,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677472719] [2021-03-10 21:32:53,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:32:53,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:53,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:32:53,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:32:53,197 INFO L87 Difference]: Start difference. First operand 142483 states and 429441 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:54,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:54,467 INFO L93 Difference]: Finished difference Result 142894 states and 429992 transitions. [2021-03-10 21:32:54,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:32:54,468 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:32:54,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:54,783 INFO L225 Difference]: With dead ends: 142894 [2021-03-10 21:32:54,783 INFO L226 Difference]: Without dead ends: 142890 [2021-03-10 21:32:54,784 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 165.1ms TimeCoverageRelationStatistics Valid=239, Invalid=411, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:32:54,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142890 states. [2021-03-10 21:32:57,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142890 to 142503. [2021-03-10 21:32:57,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142503 states, 142502 states have (on average 3.0139226116124687) internal successors, (429490), 142502 states have internal predecessors, (429490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:57,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142503 states to 142503 states and 429490 transitions. [2021-03-10 21:32:57,669 INFO L78 Accepts]: Start accepts. Automaton has 142503 states and 429490 transitions. Word has length 25 [2021-03-10 21:32:57,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:32:57,669 INFO L480 AbstractCegarLoop]: Abstraction has 142503 states and 429490 transitions. [2021-03-10 21:32:57,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:57,669 INFO L276 IsEmpty]: Start isEmpty. Operand 142503 states and 429490 transitions. [2021-03-10 21:32:57,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:32:57,746 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:32:57,746 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:32:57,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21876,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:57,946 INFO L428 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:32:57,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:32:57,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1272967698, now seen corresponding path program 484 times [2021-03-10 21:32:57,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:32:57,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201177483] [2021-03-10 21:32:57,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:32:57,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:32:58,029 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:58,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201177483] [2021-03-10 21:32:58,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100408583] [2021-03-10 21:32:58,029 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:32:58,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:32:58,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:32:58,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:32:58,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:32:58,119 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 33 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:32:58,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:32:58,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:32:58,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990886974] [2021-03-10 21:32:58,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:32:58,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:32:58,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:32:58,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:32:58,120 INFO L87 Difference]: Start difference. First operand 142503 states and 429490 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:32:59,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:32:59,332 INFO L93 Difference]: Finished difference Result 152571 states and 458598 transitions. [2021-03-10 21:32:59,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 21:32:59,333 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:32:59,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:32:59,669 INFO L225 Difference]: With dead ends: 152571 [2021-03-10 21:32:59,669 INFO L226 Difference]: Without dead ends: 152571 [2021-03-10 21:32:59,669 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=183, Invalid=279, Unknown=0, NotChecked=0, Total=462 [2021-03-10 21:32:59,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152571 states. [2021-03-10 21:33:02,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152571 to 142516. [2021-03-10 21:33:02,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142516 states, 142515 states have (on average 3.0138722239764237) internal successors, (429522), 142515 states have internal predecessors, (429522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:02,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142516 states to 142516 states and 429522 transitions. [2021-03-10 21:33:02,712 INFO L78 Accepts]: Start accepts. Automaton has 142516 states and 429522 transitions. Word has length 25 [2021-03-10 21:33:02,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:02,712 INFO L480 AbstractCegarLoop]: Abstraction has 142516 states and 429522 transitions. [2021-03-10 21:33:02,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:02,712 INFO L276 IsEmpty]: Start isEmpty. Operand 142516 states and 429522 transitions. [2021-03-10 21:33:02,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:33:02,789 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:02,789 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:02,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21877,486 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:02,989 INFO L428 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:02,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:02,989 INFO L82 PathProgramCache]: Analyzing trace with hash -456079636, now seen corresponding path program 485 times [2021-03-10 21:33:02,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:02,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872079364] [2021-03-10 21:33:02,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:02,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:03,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872079364] [2021-03-10 21:33:03,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983298441] [2021-03-10 21:33:03,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:03,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 21:33:03,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:03,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:33:03,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:03,183 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 32 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:03,184 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:03,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:33:03,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514847439] [2021-03-10 21:33:03,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:33:03,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:03,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:33:03,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=152, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:33:03,184 INFO L87 Difference]: Start difference. First operand 142516 states and 429522 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:04,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:04,547 INFO L93 Difference]: Finished difference Result 161991 states and 486545 transitions. [2021-03-10 21:33:04,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:33:04,548 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:33:04,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:04,904 INFO L225 Difference]: With dead ends: 161991 [2021-03-10 21:33:04,904 INFO L226 Difference]: Without dead ends: 161991 [2021-03-10 21:33:04,904 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 207.7ms TimeCoverageRelationStatistics Valid=282, Invalid=474, Unknown=0, NotChecked=0, Total=756 [2021-03-10 21:33:05,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161991 states. [2021-03-10 21:33:07,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161991 to 134941. [2021-03-10 21:33:07,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134941 states, 134940 states have (on average 3.012390692159478) internal successors, (406492), 134940 states have internal predecessors, (406492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:08,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134941 states to 134941 states and 406492 transitions. [2021-03-10 21:33:08,412 INFO L78 Accepts]: Start accepts. Automaton has 134941 states and 406492 transitions. Word has length 25 [2021-03-10 21:33:08,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:08,412 INFO L480 AbstractCegarLoop]: Abstraction has 134941 states and 406492 transitions. [2021-03-10 21:33:08,413 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:08,413 INFO L276 IsEmpty]: Start isEmpty. Operand 134941 states and 406492 transitions. [2021-03-10 21:33:08,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:33:08,503 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:08,503 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:08,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21878,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:08,725 INFO L428 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:08,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:08,725 INFO L82 PathProgramCache]: Analyzing trace with hash 1778027858, now seen corresponding path program 486 times [2021-03-10 21:33:08,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:08,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309998203] [2021-03-10 21:33:08,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:08,809 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:08,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309998203] [2021-03-10 21:33:08,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866492529] [2021-03-10 21:33:08,809 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:08,831 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 21:33:08,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:08,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:33:08,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:08,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:08,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:33:08,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367992974] [2021-03-10 21:33:08,906 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:33:08,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:08,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:33:08,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:33:08,907 INFO L87 Difference]: Start difference. First operand 134941 states and 406492 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:10,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:10,391 INFO L93 Difference]: Finished difference Result 190874 states and 573960 transitions. [2021-03-10 21:33:10,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:33:10,392 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:33:10,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:10,829 INFO L225 Difference]: With dead ends: 190874 [2021-03-10 21:33:10,829 INFO L226 Difference]: Without dead ends: 190874 [2021-03-10 21:33:10,829 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 217.0ms TimeCoverageRelationStatistics Valid=335, Invalid=595, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:33:10,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190874 states. [2021-03-10 21:33:14,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190874 to 166083. [2021-03-10 21:33:14,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166083 states, 166082 states have (on average 3.0187678375742104) internal successors, (501363), 166082 states have internal predecessors, (501363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:15,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166083 states to 166083 states and 501363 transitions. [2021-03-10 21:33:15,036 INFO L78 Accepts]: Start accepts. Automaton has 166083 states and 501363 transitions. Word has length 25 [2021-03-10 21:33:15,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:15,036 INFO L480 AbstractCegarLoop]: Abstraction has 166083 states and 501363 transitions. [2021-03-10 21:33:15,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:15,036 INFO L276 IsEmpty]: Start isEmpty. Operand 166083 states and 501363 transitions. [2021-03-10 21:33:15,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:33:15,117 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:15,117 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:15,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 488 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21879 [2021-03-10 21:33:15,317 INFO L428 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:15,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:15,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1979083860, now seen corresponding path program 487 times [2021-03-10 21:33:15,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:15,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063234154] [2021-03-10 21:33:15,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:15,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:15,423 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:15,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063234154] [2021-03-10 21:33:15,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1969057943] [2021-03-10 21:33:15,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:15,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:15,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:33:15,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:15,510 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:15,510 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:15,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-03-10 21:33:15,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054209742] [2021-03-10 21:33:15,511 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:33:15,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:15,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:33:15,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:33:15,511 INFO L87 Difference]: Start difference. First operand 166083 states and 501363 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:16,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:16,426 INFO L93 Difference]: Finished difference Result 187568 states and 564047 transitions. [2021-03-10 21:33:16,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:33:16,427 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:33:16,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:17,458 INFO L225 Difference]: With dead ends: 187568 [2021-03-10 21:33:17,458 INFO L226 Difference]: Without dead ends: 187568 [2021-03-10 21:33:17,458 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 244.4ms TimeCoverageRelationStatistics Valid=378, Invalid=678, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:33:17,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187568 states. [2021-03-10 21:33:19,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187568 to 137430. [2021-03-10 21:33:20,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137430 states, 137429 states have (on average 3.0178492166864346) internal successors, (414740), 137429 states have internal predecessors, (414740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:20,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137430 states to 137430 states and 414740 transitions. [2021-03-10 21:33:20,478 INFO L78 Accepts]: Start accepts. Automaton has 137430 states and 414740 transitions. Word has length 25 [2021-03-10 21:33:20,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:20,478 INFO L480 AbstractCegarLoop]: Abstraction has 137430 states and 414740 transitions. [2021-03-10 21:33:20,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:20,478 INFO L276 IsEmpty]: Start isEmpty. Operand 137430 states and 414740 transitions. [2021-03-10 21:33:20,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:33:20,549 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:20,549 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:20,749 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 489 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21880 [2021-03-10 21:33:20,749 INFO L428 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:20,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:20,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1809537170, now seen corresponding path program 488 times [2021-03-10 21:33:20,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:20,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642135240] [2021-03-10 21:33:20,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:20,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:20,849 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:20,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642135240] [2021-03-10 21:33:20,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511407376] [2021-03-10 21:33:20,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:20,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:33:20,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:20,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:33:20,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:20,942 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:20,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:20,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-03-10 21:33:20,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995483877] [2021-03-10 21:33:20,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:33:20,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:20,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:33:20,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:33:20,943 INFO L87 Difference]: Start difference. First operand 137430 states and 414740 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:22,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:22,445 INFO L93 Difference]: Finished difference Result 196837 states and 592516 transitions. [2021-03-10 21:33:22,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:33:22,446 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:33:22,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:22,930 INFO L225 Difference]: With dead ends: 196837 [2021-03-10 21:33:22,931 INFO L226 Difference]: Without dead ends: 196837 [2021-03-10 21:33:22,931 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 241.5ms TimeCoverageRelationStatistics Valid=346, Invalid=646, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:33:23,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196837 states. [2021-03-10 21:33:26,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196837 to 188376. [2021-03-10 21:33:26,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188376 states, 188375 states have (on average 3.0179960185799604) internal successors, (568515), 188375 states have internal predecessors, (568515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:27,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188376 states to 188376 states and 568515 transitions. [2021-03-10 21:33:27,371 INFO L78 Accepts]: Start accepts. Automaton has 188376 states and 568515 transitions. Word has length 25 [2021-03-10 21:33:27,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:27,372 INFO L480 AbstractCegarLoop]: Abstraction has 188376 states and 568515 transitions. [2021-03-10 21:33:27,372 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:27,372 INFO L276 IsEmpty]: Start isEmpty. Operand 188376 states and 568515 transitions. [2021-03-10 21:33:27,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:33:27,450 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:27,450 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:27,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21881 [2021-03-10 21:33:27,651 INFO L428 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:27,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:27,651 INFO L82 PathProgramCache]: Analyzing trace with hash -1002295188, now seen corresponding path program 489 times [2021-03-10 21:33:27,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:27,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527457209] [2021-03-10 21:33:27,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:27,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:27,776 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:27,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527457209] [2021-03-10 21:33:27,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757739272] [2021-03-10 21:33:27,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:27,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:33:27,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:27,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:33:27,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:27,869 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:27,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:27,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-03-10 21:33:27,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289962363] [2021-03-10 21:33:27,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:33:27,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:27,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:33:27,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:33:27,869 INFO L87 Difference]: Start difference. First operand 188376 states and 568515 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:29,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:29,398 INFO L93 Difference]: Finished difference Result 194807 states and 586573 transitions. [2021-03-10 21:33:29,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:33:29,399 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:33:29,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:29,874 INFO L225 Difference]: With dead ends: 194807 [2021-03-10 21:33:29,875 INFO L226 Difference]: Without dead ends: 194807 [2021-03-10 21:33:29,875 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 224.6ms TimeCoverageRelationStatistics Valid=291, Invalid=579, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:33:30,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194807 states. [2021-03-10 21:33:33,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194807 to 176201. [2021-03-10 21:33:33,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176201 states, 176200 states have (on average 3.0188251986379115) internal successors, (531917), 176200 states have internal predecessors, (531917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:34,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176201 states to 176201 states and 531917 transitions. [2021-03-10 21:33:34,296 INFO L78 Accepts]: Start accepts. Automaton has 176201 states and 531917 transitions. Word has length 25 [2021-03-10 21:33:34,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:34,296 INFO L480 AbstractCegarLoop]: Abstraction has 176201 states and 531917 transitions. [2021-03-10 21:33:34,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:34,296 INFO L276 IsEmpty]: Start isEmpty. Operand 176201 states and 531917 transitions. [2021-03-10 21:33:34,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:33:34,366 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:34,366 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:34,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21882,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:34,566 INFO L428 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:34,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:34,567 INFO L82 PathProgramCache]: Analyzing trace with hash 2025214930, now seen corresponding path program 490 times [2021-03-10 21:33:34,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:34,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300075868] [2021-03-10 21:33:34,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:34,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:34,693 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:34,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300075868] [2021-03-10 21:33:34,694 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821111271] [2021-03-10 21:33:34,694 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:34,713 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:33:34,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:34,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:33:34,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:34,787 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:34,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:34,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-03-10 21:33:34,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651946244] [2021-03-10 21:33:34,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:33:34,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:34,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:33:34,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:33:34,788 INFO L87 Difference]: Start difference. First operand 176201 states and 531917 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:36,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:36,482 INFO L93 Difference]: Finished difference Result 217693 states and 655300 transitions. [2021-03-10 21:33:36,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:33:36,483 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:33:36,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:37,003 INFO L225 Difference]: With dead ends: 217693 [2021-03-10 21:33:37,003 INFO L226 Difference]: Without dead ends: 217693 [2021-03-10 21:33:37,003 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 228.9ms TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:33:37,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217693 states. [2021-03-10 21:33:40,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217693 to 216490. [2021-03-10 21:33:41,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216490 states, 216489 states have (on average 3.015173981126062) internal successors, (652752), 216489 states have internal predecessors, (652752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:42,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216490 states to 216490 states and 652752 transitions. [2021-03-10 21:33:42,469 INFO L78 Accepts]: Start accepts. Automaton has 216490 states and 652752 transitions. Word has length 25 [2021-03-10 21:33:42,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:42,469 INFO L480 AbstractCegarLoop]: Abstraction has 216490 states and 652752 transitions. [2021-03-10 21:33:42,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:42,469 INFO L276 IsEmpty]: Start isEmpty. Operand 216490 states and 652752 transitions. [2021-03-10 21:33:42,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:33:42,593 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:42,593 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:42,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21883 [2021-03-10 21:33:42,793 INFO L428 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:42,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:42,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1388748076, now seen corresponding path program 491 times [2021-03-10 21:33:42,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:42,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481758844] [2021-03-10 21:33:42,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:42,935 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:42,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481758844] [2021-03-10 21:33:42,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196968103] [2021-03-10 21:33:42,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:42,957 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:33:42,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:42,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:33:42,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:43,032 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:43,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:43,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-03-10 21:33:43,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433804568] [2021-03-10 21:33:43,032 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:33:43,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:43,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:33:43,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:33:43,033 INFO L87 Difference]: Start difference. First operand 216490 states and 652752 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:44,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:44,146 INFO L93 Difference]: Finished difference Result 218270 states and 656956 transitions. [2021-03-10 21:33:44,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:33:44,147 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:33:44,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:44,687 INFO L225 Difference]: With dead ends: 218270 [2021-03-10 21:33:44,687 INFO L226 Difference]: Without dead ends: 218270 [2021-03-10 21:33:44,687 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 334.3ms TimeCoverageRelationStatistics Valid=455, Invalid=951, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:33:45,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218270 states. [2021-03-10 21:33:49,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218270 to 215575. [2021-03-10 21:33:49,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215575 states, 215574 states have (on average 3.0152337480401163) internal successors, (650006), 215574 states have internal predecessors, (650006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:50,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215575 states to 215575 states and 650006 transitions. [2021-03-10 21:33:50,020 INFO L78 Accepts]: Start accepts. Automaton has 215575 states and 650006 transitions. Word has length 25 [2021-03-10 21:33:50,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:50,020 INFO L480 AbstractCegarLoop]: Abstraction has 215575 states and 650006 transitions. [2021-03-10 21:33:50,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:50,020 INFO L276 IsEmpty]: Start isEmpty. Operand 215575 states and 650006 transitions. [2021-03-10 21:33:50,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:33:50,111 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:50,111 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:50,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21884,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:50,311 INFO L428 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:50,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:50,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1161855214, now seen corresponding path program 492 times [2021-03-10 21:33:50,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:50,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112012725] [2021-03-10 21:33:50,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:50,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:50,460 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:50,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112012725] [2021-03-10 21:33:50,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [212190807] [2021-03-10 21:33:50,461 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:50,483 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:33:50,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:33:50,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:33:50,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:50,554 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:50,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:50,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-03-10 21:33:50,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369895599] [2021-03-10 21:33:50,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:33:50,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:50,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:33:50,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:33:50,555 INFO L87 Difference]: Start difference. First operand 215575 states and 650006 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:52,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:33:52,504 INFO L93 Difference]: Finished difference Result 228955 states and 688973 transitions. [2021-03-10 21:33:52,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 21:33:52,504 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:33:52,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:33:53,070 INFO L225 Difference]: With dead ends: 228955 [2021-03-10 21:33:53,070 INFO L226 Difference]: Without dead ends: 228955 [2021-03-10 21:33:53,071 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 476.1ms TimeCoverageRelationStatistics Valid=791, Invalid=1561, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 21:33:53,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228955 states. [2021-03-10 21:33:57,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228955 to 226618. [2021-03-10 21:33:57,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226618 states, 226617 states have (on average 3.0145929034450196) internal successors, (683158), 226617 states have internal predecessors, (683158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:58,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226618 states to 226618 states and 683158 transitions. [2021-03-10 21:33:58,744 INFO L78 Accepts]: Start accepts. Automaton has 226618 states and 683158 transitions. Word has length 25 [2021-03-10 21:33:58,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:33:58,744 INFO L480 AbstractCegarLoop]: Abstraction has 226618 states and 683158 transitions. [2021-03-10 21:33:58,744 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:33:58,744 INFO L276 IsEmpty]: Start isEmpty. Operand 226618 states and 683158 transitions. [2021-03-10 21:33:58,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:33:58,817 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:33:58,817 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:33:59,017 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21885 [2021-03-10 21:33:59,017 INFO L428 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:33:59,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:33:59,017 INFO L82 PathProgramCache]: Analyzing trace with hash 745684742, now seen corresponding path program 493 times [2021-03-10 21:33:59,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:33:59,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866711565] [2021-03-10 21:33:59,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:33:59,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:33:59,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866711565] [2021-03-10 21:33:59,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796889904] [2021-03-10 21:33:59,151 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:33:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:33:59,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:33:59,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:33:59,232 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 17 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:33:59,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:33:59,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-03-10 21:33:59,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135701535] [2021-03-10 21:33:59,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:33:59,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:33:59,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:33:59,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:33:59,233 INFO L87 Difference]: Start difference. First operand 226618 states and 683158 transitions. Second operand has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:01,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:01,198 INFO L93 Difference]: Finished difference Result 227249 states and 684138 transitions. [2021-03-10 21:34:01,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:34:01,199 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:34:01,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:01,725 INFO L225 Difference]: With dead ends: 227249 [2021-03-10 21:34:01,725 INFO L226 Difference]: Without dead ends: 227239 [2021-03-10 21:34:01,725 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 336.0ms TimeCoverageRelationStatistics Valid=419, Invalid=841, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 21:34:01,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227239 states. [2021-03-10 21:34:05,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227239 to 226674. [2021-03-10 21:34:05,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226674 states, 226673 states have (on average 3.0146334146545906) internal successors, (683336), 226673 states have internal predecessors, (683336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:07,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226674 states to 226674 states and 683336 transitions. [2021-03-10 21:34:07,078 INFO L78 Accepts]: Start accepts. Automaton has 226674 states and 683336 transitions. Word has length 25 [2021-03-10 21:34:07,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:07,078 INFO L480 AbstractCegarLoop]: Abstraction has 226674 states and 683336 transitions. [2021-03-10 21:34:07,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:07,078 INFO L276 IsEmpty]: Start isEmpty. Operand 226674 states and 683336 transitions. [2021-03-10 21:34:07,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:34:07,184 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:07,184 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:07,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21886 [2021-03-10 21:34:07,406 INFO L428 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:07,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:07,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1539991964, now seen corresponding path program 494 times [2021-03-10 21:34:07,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:07,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028260353] [2021-03-10 21:34:07,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:07,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:34:07,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028260353] [2021-03-10 21:34:07,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785372744] [2021-03-10 21:34:07,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:07,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:34:07,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:07,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:34:07,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:07,632 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 29 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:34:07,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:07,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-03-10 21:34:07,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621932869] [2021-03-10 21:34:07,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:34:07,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:07,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:34:07,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:34:07,633 INFO L87 Difference]: Start difference. First operand 226674 states and 683336 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:08,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:08,753 INFO L93 Difference]: Finished difference Result 282714 states and 850818 transitions. [2021-03-10 21:34:08,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:34:08,754 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:34:08,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:10,417 INFO L225 Difference]: With dead ends: 282714 [2021-03-10 21:34:10,417 INFO L226 Difference]: Without dead ends: 282711 [2021-03-10 21:34:10,417 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 178.7ms TimeCoverageRelationStatistics Valid=173, Invalid=379, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:34:10,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282711 states. [2021-03-10 21:34:15,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282711 to 259064. [2021-03-10 21:34:15,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259064 states, 259063 states have (on average 3.0122711464006824) internal successors, (780368), 259063 states have internal predecessors, (780368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:16,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259064 states to 259064 states and 780368 transitions. [2021-03-10 21:34:16,858 INFO L78 Accepts]: Start accepts. Automaton has 259064 states and 780368 transitions. Word has length 25 [2021-03-10 21:34:16,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:16,858 INFO L480 AbstractCegarLoop]: Abstraction has 259064 states and 780368 transitions. [2021-03-10 21:34:16,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:16,858 INFO L276 IsEmpty]: Start isEmpty. Operand 259064 states and 780368 transitions. [2021-03-10 21:34:16,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:34:16,943 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:16,943 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:17,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21887,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:17,143 INFO L428 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:17,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:17,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1487518154, now seen corresponding path program 495 times [2021-03-10 21:34:17,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:17,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72644935] [2021-03-10 21:34:17,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:17,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:17,290 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:17,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72644935] [2021-03-10 21:34:17,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80111157] [2021-03-10 21:34:17,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:17,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:34:17,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:17,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:34:17,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:17,378 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:17,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:17,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-03-10 21:34:17,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571134015] [2021-03-10 21:34:17,378 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:34:17,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:17,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:34:17,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:34:17,379 INFO L87 Difference]: Start difference. First operand 259064 states and 780368 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:19,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:19,313 INFO L93 Difference]: Finished difference Result 293908 states and 884190 transitions. [2021-03-10 21:34:19,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:34:19,314 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:34:19,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:19,979 INFO L225 Difference]: With dead ends: 293908 [2021-03-10 21:34:19,979 INFO L226 Difference]: Without dead ends: 293908 [2021-03-10 21:34:19,979 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 262.3ms TimeCoverageRelationStatistics Valid=328, Invalid=664, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:34:20,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293908 states. [2021-03-10 21:34:23,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293908 to 161560. [2021-03-10 21:34:23,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161560 states, 161559 states have (on average 3.0078423362362976) internal successors, (485944), 161559 states have internal predecessors, (485944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:24,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161560 states to 161560 states and 485944 transitions. [2021-03-10 21:34:24,424 INFO L78 Accepts]: Start accepts. Automaton has 161560 states and 485944 transitions. Word has length 25 [2021-03-10 21:34:24,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:24,424 INFO L480 AbstractCegarLoop]: Abstraction has 161560 states and 485944 transitions. [2021-03-10 21:34:24,425 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:24,425 INFO L276 IsEmpty]: Start isEmpty. Operand 161560 states and 485944 transitions. [2021-03-10 21:34:24,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:34:24,502 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:24,502 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:24,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21888 [2021-03-10 21:34:24,702 INFO L428 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:24,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:24,702 INFO L82 PathProgramCache]: Analyzing trace with hash 851051300, now seen corresponding path program 496 times [2021-03-10 21:34:24,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:24,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568815659] [2021-03-10 21:34:24,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:24,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:25,456 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:25,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568815659] [2021-03-10 21:34:25,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107514749] [2021-03-10 21:34:25,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:25,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:34:25,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:25,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:34:25,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:25,597 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:25,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:25,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-03-10 21:34:25,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518908642] [2021-03-10 21:34:25,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:34:25,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:25,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:34:25,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:34:25,598 INFO L87 Difference]: Start difference. First operand 161560 states and 485944 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:26,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:26,844 INFO L93 Difference]: Finished difference Result 206105 states and 618467 transitions. [2021-03-10 21:34:26,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 21:34:26,845 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:34:26,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:27,349 INFO L225 Difference]: With dead ends: 206105 [2021-03-10 21:34:27,349 INFO L226 Difference]: Without dead ends: 206105 [2021-03-10 21:34:27,349 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1048.2ms TimeCoverageRelationStatistics Valid=646, Invalid=1246, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 21:34:27,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206105 states. [2021-03-10 21:34:30,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206105 to 120052. [2021-03-10 21:34:30,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120052 states, 120051 states have (on average 3.011636721060216) internal successors, (361550), 120051 states have internal predecessors, (361550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:31,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120052 states to 120052 states and 361550 transitions. [2021-03-10 21:34:31,150 INFO L78 Accepts]: Start accepts. Automaton has 120052 states and 361550 transitions. Word has length 25 [2021-03-10 21:34:31,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:31,150 INFO L480 AbstractCegarLoop]: Abstraction has 120052 states and 361550 transitions. [2021-03-10 21:34:31,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:31,150 INFO L276 IsEmpty]: Start isEmpty. Operand 120052 states and 361550 transitions. [2021-03-10 21:34:31,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:34:31,200 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:31,200 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:31,400 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21889,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:31,400 INFO L428 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:31,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:31,400 INFO L82 PathProgramCache]: Analyzing trace with hash -2147351670, now seen corresponding path program 497 times [2021-03-10 21:34:31,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:31,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168012132] [2021-03-10 21:34:31,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:31,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:31,542 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:31,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168012132] [2021-03-10 21:34:31,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215888537] [2021-03-10 21:34:31,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:31,564 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:34:31,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:31,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:34:31,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:31,636 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:31,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:31,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-03-10 21:34:31,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519044886] [2021-03-10 21:34:31,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:34:31,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:31,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:34:31,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:34:31,637 INFO L87 Difference]: Start difference. First operand 120052 states and 361550 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:33,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:33,045 INFO L93 Difference]: Finished difference Result 156127 states and 468137 transitions. [2021-03-10 21:34:33,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:34:33,060 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:34:33,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:33,407 INFO L225 Difference]: With dead ends: 156127 [2021-03-10 21:34:33,407 INFO L226 Difference]: Without dead ends: 156127 [2021-03-10 21:34:33,407 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 373.2ms TimeCoverageRelationStatistics Valid=553, Invalid=1087, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:34:33,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156127 states. [2021-03-10 21:34:35,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156127 to 136853. [2021-03-10 21:34:35,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136853 states, 136852 states have (on average 3.0079209657147867) internal successors, (411640), 136852 states have internal predecessors, (411640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:36,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136853 states to 136853 states and 411640 transitions. [2021-03-10 21:34:36,192 INFO L78 Accepts]: Start accepts. Automaton has 136853 states and 411640 transitions. Word has length 25 [2021-03-10 21:34:36,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:36,192 INFO L480 AbstractCegarLoop]: Abstraction has 136853 states and 411640 transitions. [2021-03-10 21:34:36,192 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:36,192 INFO L276 IsEmpty]: Start isEmpty. Operand 136853 states and 411640 transitions. [2021-03-10 21:34:36,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:34:36,253 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:36,253 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:36,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21890,499 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:36,454 INFO L428 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:36,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:36,454 INFO L82 PathProgramCache]: Analyzing trace with hash 777604746, now seen corresponding path program 498 times [2021-03-10 21:34:36,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:36,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396562971] [2021-03-10 21:34:36,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:36,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:36,558 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:34:36,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396562971] [2021-03-10 21:34:36,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178099649] [2021-03-10 21:34:36,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:36,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:34:36,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:36,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:34:36,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:36,643 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 31 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:34:36,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:36,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:34:36,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145037602] [2021-03-10 21:34:36,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:34:36,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:36,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:34:36,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:34:36,644 INFO L87 Difference]: Start difference. First operand 136853 states and 411640 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:37,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:37,917 INFO L93 Difference]: Finished difference Result 148224 states and 444406 transitions. [2021-03-10 21:34:37,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:34:37,918 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:34:37,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:38,242 INFO L225 Difference]: With dead ends: 148224 [2021-03-10 21:34:38,242 INFO L226 Difference]: Without dead ends: 148224 [2021-03-10 21:34:38,242 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 212.6ms TimeCoverageRelationStatistics Valid=334, Invalid=596, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:34:38,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148224 states. [2021-03-10 21:34:40,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148224 to 137131. [2021-03-10 21:34:40,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137131 states, 137130 states have (on average 3.0072631809232115) internal successors, (412386), 137130 states have internal predecessors, (412386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:41,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137131 states to 137131 states and 412386 transitions. [2021-03-10 21:34:41,141 INFO L78 Accepts]: Start accepts. Automaton has 137131 states and 412386 transitions. Word has length 25 [2021-03-10 21:34:41,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:41,141 INFO L480 AbstractCegarLoop]: Abstraction has 137131 states and 412386 transitions. [2021-03-10 21:34:41,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:41,142 INFO L276 IsEmpty]: Start isEmpty. Operand 137131 states and 412386 transitions. [2021-03-10 21:34:41,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:34:41,213 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:41,213 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:41,413 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21891 [2021-03-10 21:34:41,413 INFO L428 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:41,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:41,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1315460324, now seen corresponding path program 499 times [2021-03-10 21:34:41,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:41,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070589589] [2021-03-10 21:34:41,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:41,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:41,530 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:41,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070589589] [2021-03-10 21:34:41,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641787755] [2021-03-10 21:34:41,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:41,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:34:41,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:41,632 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 30 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:41,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:41,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-03-10 21:34:41,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166587865] [2021-03-10 21:34:41,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:34:41,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:41,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:34:41,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:34:41,632 INFO L87 Difference]: Start difference. First operand 137131 states and 412386 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:42,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:42,981 INFO L93 Difference]: Finished difference Result 148544 states and 445335 transitions. [2021-03-10 21:34:42,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:34:42,982 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:34:42,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:43,327 INFO L225 Difference]: With dead ends: 148544 [2021-03-10 21:34:43,327 INFO L226 Difference]: Without dead ends: 148544 [2021-03-10 21:34:43,327 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 273.9ms TimeCoverageRelationStatistics Valid=377, Invalid=679, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:34:43,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148544 states. [2021-03-10 21:34:45,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148544 to 113272. [2021-03-10 21:34:45,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113272 states, 113271 states have (on average 3.0100908440818923) internal successors, (340956), 113271 states have internal predecessors, (340956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:46,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113272 states to 113272 states and 340956 transitions. [2021-03-10 21:34:46,158 INFO L78 Accepts]: Start accepts. Automaton has 113272 states and 340956 transitions. Word has length 25 [2021-03-10 21:34:46,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:46,158 INFO L480 AbstractCegarLoop]: Abstraction has 113272 states and 340956 transitions. [2021-03-10 21:34:46,159 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:46,159 INFO L276 IsEmpty]: Start isEmpty. Operand 113272 states and 340956 transitions. [2021-03-10 21:34:46,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:34:46,205 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:46,206 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:46,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 501 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21892 [2021-03-10 21:34:46,406 INFO L428 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:46,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:46,406 INFO L82 PathProgramCache]: Analyzing trace with hash 809114058, now seen corresponding path program 500 times [2021-03-10 21:34:46,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:46,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219335571] [2021-03-10 21:34:46,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:46,505 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:34:46,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219335571] [2021-03-10 21:34:46,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448943547] [2021-03-10 21:34:46,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:46,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:34:46,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:46,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:34:46,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:34:46,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:46,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-03-10 21:34:46,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969241040] [2021-03-10 21:34:46,589 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:34:46,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:46,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:34:46,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:34:46,589 INFO L87 Difference]: Start difference. First operand 113272 states and 340956 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:47,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:47,288 INFO L93 Difference]: Finished difference Result 128811 states and 386347 transitions. [2021-03-10 21:34:47,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-03-10 21:34:47,289 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:34:47,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:48,095 INFO L225 Difference]: With dead ends: 128811 [2021-03-10 21:34:48,095 INFO L226 Difference]: Without dead ends: 128811 [2021-03-10 21:34:48,095 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 249.5ms TimeCoverageRelationStatistics Valid=345, Invalid=647, Unknown=0, NotChecked=0, Total=992 [2021-03-10 21:34:48,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128811 states. [2021-03-10 21:34:49,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128811 to 123542. [2021-03-10 21:34:50,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123542 states, 123541 states have (on average 3.010603767170413) internal successors, (371933), 123541 states have internal predecessors, (371933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:50,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123542 states to 123542 states and 371933 transitions. [2021-03-10 21:34:50,753 INFO L78 Accepts]: Start accepts. Automaton has 123542 states and 371933 transitions. Word has length 25 [2021-03-10 21:34:50,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:50,753 INFO L480 AbstractCegarLoop]: Abstraction has 123542 states and 371933 transitions. [2021-03-10 21:34:50,753 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:50,753 INFO L276 IsEmpty]: Start isEmpty. Operand 123542 states and 371933 transitions. [2021-03-10 21:34:50,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:34:50,810 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:50,810 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:51,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21893 [2021-03-10 21:34:51,031 INFO L428 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:51,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:51,031 INFO L82 PathProgramCache]: Analyzing trace with hash -2002718300, now seen corresponding path program 501 times [2021-03-10 21:34:51,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:51,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071401015] [2021-03-10 21:34:51,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:51,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:51,152 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:51,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071401015] [2021-03-10 21:34:51,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695280304] [2021-03-10 21:34:51,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:51,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 21:34:51,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:51,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:34:51,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:51,254 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:51,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:51,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-03-10 21:34:51,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667051317] [2021-03-10 21:34:51,255 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:34:51,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:51,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:34:51,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:34:51,255 INFO L87 Difference]: Start difference. First operand 123542 states and 371933 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:51,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:51,947 INFO L93 Difference]: Finished difference Result 127635 states and 382989 transitions. [2021-03-10 21:34:51,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:34:51,948 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:34:51,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:52,224 INFO L225 Difference]: With dead ends: 127635 [2021-03-10 21:34:52,224 INFO L226 Difference]: Without dead ends: 127635 [2021-03-10 21:34:52,224 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 246.0ms TimeCoverageRelationStatistics Valid=290, Invalid=580, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:34:52,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127635 states. [2021-03-10 21:34:54,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127635 to 109142. [2021-03-10 21:34:54,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109142 states, 109141 states have (on average 3.011242337893184) internal successors, (328650), 109141 states have internal predecessors, (328650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:54,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109142 states to 109142 states and 328650 transitions. [2021-03-10 21:34:54,849 INFO L78 Accepts]: Start accepts. Automaton has 109142 states and 328650 transitions. Word has length 25 [2021-03-10 21:34:54,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:54,849 INFO L480 AbstractCegarLoop]: Abstraction has 109142 states and 328650 transitions. [2021-03-10 21:34:54,849 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:54,849 INFO L276 IsEmpty]: Start isEmpty. Operand 109142 states and 328650 transitions. [2021-03-10 21:34:54,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:34:54,893 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:54,893 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:55,093 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 503 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21894 [2021-03-10 21:34:55,093 INFO L428 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:55,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:55,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1024791818, now seen corresponding path program 502 times [2021-03-10 21:34:55,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:55,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030283015] [2021-03-10 21:34:55,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:55,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:55,237 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:34:55,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030283015] [2021-03-10 21:34:55,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411683941] [2021-03-10 21:34:55,237 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:55,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:34:55,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:55,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:34:55,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:55,337 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:34:55,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:55,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-03-10 21:34:55,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734188438] [2021-03-10 21:34:55,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:34:55,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:55,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:34:55,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:34:55,338 INFO L87 Difference]: Start difference. First operand 109142 states and 328650 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:55,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:34:55,930 INFO L93 Difference]: Finished difference Result 120403 states and 361213 transitions. [2021-03-10 21:34:55,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 21:34:55,931 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:34:55,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:34:56,677 INFO L225 Difference]: With dead ends: 120403 [2021-03-10 21:34:56,678 INFO L226 Difference]: Without dead ends: 120403 [2021-03-10 21:34:56,678 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 228.0ms TimeCoverageRelationStatistics Valid=246, Invalid=566, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:34:56,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120403 states. [2021-03-10 21:34:58,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120403 to 116997. [2021-03-10 21:34:58,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116997 states, 116996 states have (on average 3.009564429553147) internal successors, (352107), 116996 states have internal predecessors, (352107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:58,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116997 states to 116997 states and 352107 transitions. [2021-03-10 21:34:58,862 INFO L78 Accepts]: Start accepts. Automaton has 116997 states and 352107 transitions. Word has length 25 [2021-03-10 21:34:58,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:34:58,862 INFO L480 AbstractCegarLoop]: Abstraction has 116997 states and 352107 transitions. [2021-03-10 21:34:58,862 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:34:58,862 INFO L276 IsEmpty]: Start isEmpty. Operand 116997 states and 352107 transitions. [2021-03-10 21:34:58,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:34:58,907 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:34:58,907 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:34:59,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21895,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:59,108 INFO L428 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:34:59,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:34:59,108 INFO L82 PathProgramCache]: Analyzing trace with hash 388324964, now seen corresponding path program 503 times [2021-03-10 21:34:59,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:34:59,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96219065] [2021-03-10 21:34:59,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:34:59,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:34:59,632 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:59,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96219065] [2021-03-10 21:34:59,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061772335] [2021-03-10 21:34:59,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:34:59,730 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:34:59,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:34:59,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:34:59,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:34:59,812 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:34:59,812 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:34:59,812 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-03-10 21:34:59,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182505325] [2021-03-10 21:34:59,812 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:34:59,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:34:59,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:34:59,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:34:59,812 INFO L87 Difference]: Start difference. First operand 116997 states and 352107 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:00,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:00,560 INFO L93 Difference]: Finished difference Result 121023 states and 362901 transitions. [2021-03-10 21:35:00,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:35:00,562 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:35:00,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:00,823 INFO L225 Difference]: With dead ends: 121023 [2021-03-10 21:35:00,824 INFO L226 Difference]: Without dead ends: 121023 [2021-03-10 21:35:00,824 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 717.9ms TimeCoverageRelationStatistics Valid=454, Invalid=952, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:35:00,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121023 states. [2021-03-10 21:35:03,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121023 to 111390. [2021-03-10 21:35:03,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111390 states, 111389 states have (on average 3.0099920099830326) internal successors, (335280), 111389 states have internal predecessors, (335280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:03,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111390 states to 111390 states and 335280 transitions. [2021-03-10 21:35:03,472 INFO L78 Accepts]: Start accepts. Automaton has 111390 states and 335280 transitions. Word has length 25 [2021-03-10 21:35:03,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:03,472 INFO L480 AbstractCegarLoop]: Abstraction has 111390 states and 335280 transitions. [2021-03-10 21:35:03,472 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:03,472 INFO L276 IsEmpty]: Start isEmpty. Operand 111390 states and 335280 transitions. [2021-03-10 21:35:03,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:03,518 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:03,518 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:03,719 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21896 [2021-03-10 21:35:03,719 INFO L428 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:03,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:03,719 INFO L82 PathProgramCache]: Analyzing trace with hash 2132688970, now seen corresponding path program 504 times [2021-03-10 21:35:03,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:03,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127977721] [2021-03-10 21:35:03,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:03,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:03,855 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:03,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127977721] [2021-03-10 21:35:03,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588676988] [2021-03-10 21:35:03,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:03,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:35:03,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:03,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:35:03,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:03,955 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:03,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:03,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-03-10 21:35:03,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361559611] [2021-03-10 21:35:03,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:35:03,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:03,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:35:03,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:35:03,956 INFO L87 Difference]: Start difference. First operand 111390 states and 335280 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:04,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:04,928 INFO L93 Difference]: Finished difference Result 118654 states and 355586 transitions. [2021-03-10 21:35:04,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 21:35:04,929 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:35:04,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:05,729 INFO L225 Difference]: With dead ends: 118654 [2021-03-10 21:35:05,730 INFO L226 Difference]: Without dead ends: 118654 [2021-03-10 21:35:05,730 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 493.0ms TimeCoverageRelationStatistics Valid=790, Invalid=1562, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 21:35:05,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118654 states. [2021-03-10 21:35:07,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118654 to 110489. [2021-03-10 21:35:07,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110489 states, 110488 states have (on average 3.013286510752299) internal successors, (332932), 110488 states have internal predecessors, (332932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:07,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110489 states to 110489 states and 332932 transitions. [2021-03-10 21:35:07,760 INFO L78 Accepts]: Start accepts. Automaton has 110489 states and 332932 transitions. Word has length 25 [2021-03-10 21:35:07,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:07,760 INFO L480 AbstractCegarLoop]: Abstraction has 110489 states and 332932 transitions. [2021-03-10 21:35:07,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:07,760 INFO L276 IsEmpty]: Start isEmpty. Operand 110489 states and 332932 transitions. [2021-03-10 21:35:07,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:07,805 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:07,805 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:08,005 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21897 [2021-03-10 21:35:08,005 INFO L428 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:08,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:08,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1709190436, now seen corresponding path program 505 times [2021-03-10 21:35:08,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:08,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882233461] [2021-03-10 21:35:08,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:08,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:08,115 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 13 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:08,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882233461] [2021-03-10 21:35:08,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729691466] [2021-03-10 21:35:08,115 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:08,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:08,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:35:08,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:08,211 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:08,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:08,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-03-10 21:35:08,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601198309] [2021-03-10 21:35:08,212 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:35:08,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:08,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:35:08,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:35:08,212 INFO L87 Difference]: Start difference. First operand 110489 states and 332932 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:09,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:09,358 INFO L93 Difference]: Finished difference Result 110970 states and 333571 transitions. [2021-03-10 21:35:09,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 21:35:09,359 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:35:09,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:09,629 INFO L225 Difference]: With dead ends: 110970 [2021-03-10 21:35:09,630 INFO L226 Difference]: Without dead ends: 110962 [2021-03-10 21:35:09,630 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 318.7ms TimeCoverageRelationStatistics Valid=354, Invalid=702, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:35:09,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110962 states. [2021-03-10 21:35:11,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110962 to 110246. [2021-03-10 21:35:11,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110246 states, 110245 states have (on average 3.012263594720849) internal successors, (332087), 110245 states have internal predecessors, (332087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:12,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110246 states to 110246 states and 332087 transitions. [2021-03-10 21:35:12,242 INFO L78 Accepts]: Start accepts. Automaton has 110246 states and 332087 transitions. Word has length 25 [2021-03-10 21:35:12,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:12,243 INFO L480 AbstractCegarLoop]: Abstraction has 110246 states and 332087 transitions. [2021-03-10 21:35:12,243 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 16 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:12,243 INFO L276 IsEmpty]: Start isEmpty. Operand 110246 states and 332087 transitions. [2021-03-10 21:35:12,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:12,289 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:12,289 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:12,489 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21898 [2021-03-10 21:35:12,490 INFO L428 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:12,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:12,490 INFO L82 PathProgramCache]: Analyzing trace with hash -840408732, now seen corresponding path program 506 times [2021-03-10 21:35:12,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:12,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539765867] [2021-03-10 21:35:12,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:12,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:12,649 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:12,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539765867] [2021-03-10 21:35:12,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849216004] [2021-03-10 21:35:12,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:12,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:35:12,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:12,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:35:12,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:12,759 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:12,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:12,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-03-10 21:35:12,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033217863] [2021-03-10 21:35:12,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:35:12,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:12,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:35:12,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:35:12,760 INFO L87 Difference]: Start difference. First operand 110246 states and 332087 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:13,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:13,558 INFO L93 Difference]: Finished difference Result 112954 states and 339359 transitions. [2021-03-10 21:35:13,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 21:35:13,559 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:35:13,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:13,823 INFO L225 Difference]: With dead ends: 112954 [2021-03-10 21:35:13,824 INFO L226 Difference]: Without dead ends: 112954 [2021-03-10 21:35:13,824 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 403.4ms TimeCoverageRelationStatistics Valid=559, Invalid=1081, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:35:13,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112954 states. [2021-03-10 21:35:16,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112954 to 100239. [2021-03-10 21:35:16,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100239 states, 100238 states have (on average 3.0128693708972647) internal successors, (302004), 100238 states have internal predecessors, (302004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:16,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100239 states to 100239 states and 302004 transitions. [2021-03-10 21:35:16,611 INFO L78 Accepts]: Start accepts. Automaton has 100239 states and 302004 transitions. Word has length 25 [2021-03-10 21:35:16,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:16,611 INFO L480 AbstractCegarLoop]: Abstraction has 100239 states and 302004 transitions. [2021-03-10 21:35:16,611 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:16,611 INFO L276 IsEmpty]: Start isEmpty. Operand 100239 states and 302004 transitions. [2021-03-10 21:35:16,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:16,648 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:16,648 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:16,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21899,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:16,848 INFO L428 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:16,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:16,849 INFO L82 PathProgramCache]: Analyzing trace with hash 2116056996, now seen corresponding path program 507 times [2021-03-10 21:35:16,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:16,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556174128] [2021-03-10 21:35:16,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:16,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:16,950 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 52 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:16,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556174128] [2021-03-10 21:35:16,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944482460] [2021-03-10 21:35:16,950 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:16,972 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:35:16,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:16,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:35:16,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:17,054 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 28 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:17,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:17,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-03-10 21:35:17,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933326869] [2021-03-10 21:35:17,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:35:17,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:17,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:35:17,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:35:17,055 INFO L87 Difference]: Start difference. First operand 100239 states and 302004 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:17,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:17,713 INFO L93 Difference]: Finished difference Result 102496 states and 307786 transitions. [2021-03-10 21:35:17,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:35:17,715 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:35:17,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:18,475 INFO L225 Difference]: With dead ends: 102496 [2021-03-10 21:35:18,476 INFO L226 Difference]: Without dead ends: 102494 [2021-03-10 21:35:18,476 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 261.8ms TimeCoverageRelationStatistics Valid=371, Invalid=685, Unknown=0, NotChecked=0, Total=1056 [2021-03-10 21:35:18,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102494 states. [2021-03-10 21:35:19,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102494 to 100260. [2021-03-10 21:35:20,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100260 states, 100259 states have (on average 3.012687140306606) internal successors, (302049), 100259 states have internal predecessors, (302049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:20,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100260 states to 100260 states and 302049 transitions. [2021-03-10 21:35:20,359 INFO L78 Accepts]: Start accepts. Automaton has 100260 states and 302049 transitions. Word has length 25 [2021-03-10 21:35:20,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:20,359 INFO L480 AbstractCegarLoop]: Abstraction has 100260 states and 302049 transitions. [2021-03-10 21:35:20,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 17 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:20,359 INFO L276 IsEmpty]: Start isEmpty. Operand 100260 states and 302049 transitions. [2021-03-10 21:35:20,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:20,392 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:20,393 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:20,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21900,509 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:20,593 INFO L428 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:20,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:20,593 INFO L82 PathProgramCache]: Analyzing trace with hash -695775362, now seen corresponding path program 508 times [2021-03-10 21:35:20,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:20,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480572977] [2021-03-10 21:35:20,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:20,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:20,742 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 23 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:20,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480572977] [2021-03-10 21:35:20,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321873591] [2021-03-10 21:35:20,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:20,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:35:20,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:20,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:35:20,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:20,858 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 27 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:20,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:20,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-03-10 21:35:20,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839731150] [2021-03-10 21:35:20,858 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:35:20,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:20,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:35:20,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:35:20,859 INFO L87 Difference]: Start difference. First operand 100260 states and 302049 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:21,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:21,965 INFO L93 Difference]: Finished difference Result 101662 states and 305507 transitions. [2021-03-10 21:35:21,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-03-10 21:35:21,966 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:35:21,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:22,207 INFO L225 Difference]: With dead ends: 101662 [2021-03-10 21:35:22,207 INFO L226 Difference]: Without dead ends: 101660 [2021-03-10 21:35:22,208 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 289.4ms TimeCoverageRelationStatistics Valid=313, Invalid=617, Unknown=0, NotChecked=0, Total=930 [2021-03-10 21:35:22,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101660 states. [2021-03-10 21:35:23,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101660 to 96642. [2021-03-10 21:35:23,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96642 states, 96641 states have (on average 3.015573100443911) internal successors, (291428), 96641 states have internal predecessors, (291428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:24,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96642 states to 96642 states and 291428 transitions. [2021-03-10 21:35:24,124 INFO L78 Accepts]: Start accepts. Automaton has 96642 states and 291428 transitions. Word has length 25 [2021-03-10 21:35:24,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:24,125 INFO L480 AbstractCegarLoop]: Abstraction has 96642 states and 291428 transitions. [2021-03-10 21:35:24,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:24,125 INFO L276 IsEmpty]: Start isEmpty. Operand 96642 states and 291428 transitions. [2021-03-10 21:35:24,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:24,158 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:24,158 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:24,359 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21901 [2021-03-10 21:35:24,359 INFO L428 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:24,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:24,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1963232540, now seen corresponding path program 509 times [2021-03-10 21:35:24,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:24,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974724613] [2021-03-10 21:35:24,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:24,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:24,471 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:24,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974724613] [2021-03-10 21:35:24,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639020170] [2021-03-10 21:35:24,472 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:24,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:35:24,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:24,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:35:24,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:24,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:24,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-03-10 21:35:24,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035824837] [2021-03-10 21:35:24,568 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:35:24,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:24,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:35:24,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:35:24,569 INFO L87 Difference]: Start difference. First operand 96642 states and 291428 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:25,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:25,562 INFO L93 Difference]: Finished difference Result 100054 states and 300549 transitions. [2021-03-10 21:35:25,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 21:35:25,563 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:35:25,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:25,790 INFO L225 Difference]: With dead ends: 100054 [2021-03-10 21:35:25,791 INFO L226 Difference]: Without dead ends: 100052 [2021-03-10 21:35:25,791 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 220.7ms TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2021-03-10 21:35:25,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100052 states. [2021-03-10 21:35:27,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100052 to 98342. [2021-03-10 21:35:27,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98342 states, 98341 states have (on average 3.014002298125909) internal successors, (296400), 98341 states have internal predecessors, (296400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:27,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98342 states to 98342 states and 296400 transitions. [2021-03-10 21:35:27,711 INFO L78 Accepts]: Start accepts. Automaton has 98342 states and 296400 transitions. Word has length 25 [2021-03-10 21:35:27,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:27,711 INFO L480 AbstractCegarLoop]: Abstraction has 98342 states and 296400 transitions. [2021-03-10 21:35:27,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:27,711 INFO L276 IsEmpty]: Start isEmpty. Operand 98342 states and 296400 transitions. [2021-03-10 21:35:27,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:27,741 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:27,741 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:27,941 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21902,511 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:27,942 INFO L428 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:27,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:27,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1695267902, now seen corresponding path program 510 times [2021-03-10 21:35:27,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:27,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687261546] [2021-03-10 21:35:27,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:27,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:28,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687261546] [2021-03-10 21:35:28,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518298770] [2021-03-10 21:35:28,104 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:28,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:35:28,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:28,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:35:28,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:28,220 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:28,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:28,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-03-10 21:35:28,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910083480] [2021-03-10 21:35:28,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:35:28,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:28,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:35:28,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:35:28,221 INFO L87 Difference]: Start difference. First operand 98342 states and 296400 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:29,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:29,297 INFO L93 Difference]: Finished difference Result 100337 states and 301232 transitions. [2021-03-10 21:35:29,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 21:35:29,298 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:35:29,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:29,535 INFO L225 Difference]: With dead ends: 100337 [2021-03-10 21:35:29,535 INFO L226 Difference]: Without dead ends: 100337 [2021-03-10 21:35:29,535 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 340.3ms TimeCoverageRelationStatistics Valid=460, Invalid=946, Unknown=0, NotChecked=0, Total=1406 [2021-03-10 21:35:29,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100337 states. [2021-03-10 21:35:31,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100337 to 96946. [2021-03-10 21:35:31,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96946 states, 96945 states have (on average 3.0143070813347776) internal successors, (292222), 96945 states have internal predecessors, (292222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:31,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96946 states to 96946 states and 292222 transitions. [2021-03-10 21:35:31,531 INFO L78 Accepts]: Start accepts. Automaton has 96946 states and 292222 transitions. Word has length 25 [2021-03-10 21:35:31,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:31,532 INFO L480 AbstractCegarLoop]: Abstraction has 96946 states and 292222 transitions. [2021-03-10 21:35:31,532 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:31,532 INFO L276 IsEmpty]: Start isEmpty. Operand 96946 states and 292222 transitions. [2021-03-10 21:35:31,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:31,567 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:31,568 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:31,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21903,512 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:31,768 INFO L428 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:31,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:31,768 INFO L82 PathProgramCache]: Analyzing trace with hash -855335388, now seen corresponding path program 511 times [2021-03-10 21:35:31,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:31,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489428685] [2021-03-10 21:35:31,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:31,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:32,342 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:32,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489428685] [2021-03-10 21:35:32,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541648540] [2021-03-10 21:35:32,342 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:32,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:35:32,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:32,453 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:32,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:32,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-03-10 21:35:32,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564919085] [2021-03-10 21:35:32,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:35:32,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:32,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:35:32,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:35:32,454 INFO L87 Difference]: Start difference. First operand 96946 states and 292222 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:33,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:33,375 INFO L93 Difference]: Finished difference Result 99908 states and 299678 transitions. [2021-03-10 21:35:33,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 21:35:33,376 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:35:33,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:33,610 INFO L225 Difference]: With dead ends: 99908 [2021-03-10 21:35:33,610 INFO L226 Difference]: Without dead ends: 99908 [2021-03-10 21:35:33,611 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 552.3ms TimeCoverageRelationStatistics Valid=866, Invalid=1684, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 21:35:33,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99908 states. [2021-03-10 21:35:35,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99908 to 96368. [2021-03-10 21:35:35,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96368 states, 96367 states have (on average 3.017609762678095) internal successors, (290798), 96367 states have internal predecessors, (290798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:35,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96368 states to 96368 states and 290798 transitions. [2021-03-10 21:35:35,875 INFO L78 Accepts]: Start accepts. Automaton has 96368 states and 290798 transitions. Word has length 25 [2021-03-10 21:35:35,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:35,875 INFO L480 AbstractCegarLoop]: Abstraction has 96368 states and 290798 transitions. [2021-03-10 21:35:35,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:35,875 INFO L276 IsEmpty]: Start isEmpty. Operand 96368 states and 290798 transitions. [2021-03-10 21:35:35,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:35,903 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:35,903 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:36,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21904,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:36,104 INFO L428 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:36,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:36,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1307770042, now seen corresponding path program 512 times [2021-03-10 21:35:36,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:36,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639405926] [2021-03-10 21:35:36,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:36,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:36,208 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 12 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:36,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639405926] [2021-03-10 21:35:36,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376525095] [2021-03-10 21:35:36,209 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:36,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:35:36,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:36,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:35:36,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:36,306 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 17 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:36,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:36,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-03-10 21:35:36,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153717731] [2021-03-10 21:35:36,306 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:35:36,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:36,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:35:36,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:35:36,307 INFO L87 Difference]: Start difference. First operand 96368 states and 290798 transitions. Second operand has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:36,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:36,890 INFO L93 Difference]: Finished difference Result 96735 states and 291256 transitions. [2021-03-10 21:35:36,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 21:35:36,891 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:35:36,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:37,056 INFO L225 Difference]: With dead ends: 96735 [2021-03-10 21:35:37,056 INFO L226 Difference]: Without dead ends: 96729 [2021-03-10 21:35:37,056 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 217.5ms TimeCoverageRelationStatistics Valid=296, Invalid=574, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:35:37,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96729 states. [2021-03-10 21:35:38,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96729 to 96051. [2021-03-10 21:35:39,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96051 states, 96050 states have (on average 3.016772514315461) internal successors, (289761), 96050 states have internal predecessors, (289761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:39,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96051 states to 96051 states and 289761 transitions. [2021-03-10 21:35:39,335 INFO L78 Accepts]: Start accepts. Automaton has 96051 states and 289761 transitions. Word has length 25 [2021-03-10 21:35:39,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:39,335 INFO L480 AbstractCegarLoop]: Abstraction has 96051 states and 289761 transitions. [2021-03-10 21:35:39,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.6875) internal successors, (27), 15 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:39,335 INFO L276 IsEmpty]: Start isEmpty. Operand 96051 states and 289761 transitions. [2021-03-10 21:35:39,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:39,370 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:39,370 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:39,570 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21905,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:39,570 INFO L428 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:39,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:39,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1505431094, now seen corresponding path program 513 times [2021-03-10 21:35:39,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:39,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104764589] [2021-03-10 21:35:39,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:39,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:39,725 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:39,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104764589] [2021-03-10 21:35:39,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982485904] [2021-03-10 21:35:39,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:39,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:35:39,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:39,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:35:39,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:39,836 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:39,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:39,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-03-10 21:35:39,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959539727] [2021-03-10 21:35:39,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 21:35:39,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:39,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 21:35:39,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=248, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:35:39,837 INFO L87 Difference]: Start difference. First operand 96051 states and 289761 transitions. Second operand has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:40,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:40,380 INFO L93 Difference]: Finished difference Result 102491 states and 307848 transitions. [2021-03-10 21:35:40,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:35:40,381 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:35:40,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:40,622 INFO L225 Difference]: With dead ends: 102491 [2021-03-10 21:35:40,622 INFO L226 Difference]: Without dead ends: 102491 [2021-03-10 21:35:40,623 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 227.9ms TimeCoverageRelationStatistics Valid=199, Invalid=451, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:35:40,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102491 states. [2021-03-10 21:35:42,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102491 to 101381. [2021-03-10 21:35:42,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101381 states, 101380 states have (on average 3.0123693036101797) internal successors, (305394), 101380 states have internal predecessors, (305394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:43,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101381 states to 101381 states and 305394 transitions. [2021-03-10 21:35:43,016 INFO L78 Accepts]: Start accepts. Automaton has 101381 states and 305394 transitions. Word has length 25 [2021-03-10 21:35:43,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:43,016 INFO L480 AbstractCegarLoop]: Abstraction has 101381 states and 305394 transitions. [2021-03-10 21:35:43,016 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 1.4736842105263157) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:43,016 INFO L276 IsEmpty]: Start isEmpty. Operand 101381 states and 305394 transitions. [2021-03-10 21:35:43,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:43,055 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:43,055 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:43,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21906,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:43,255 INFO L428 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:43,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:43,255 INFO L82 PathProgramCache]: Analyzing trace with hash -2141897948, now seen corresponding path program 514 times [2021-03-10 21:35:43,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:43,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937535933] [2021-03-10 21:35:43,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:43,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:43,386 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:43,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937535933] [2021-03-10 21:35:43,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968264730] [2021-03-10 21:35:43,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:43,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:35:43,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:43,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:35:43,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:43,479 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 52 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:43,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:43,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-03-10 21:35:43,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946776417] [2021-03-10 21:35:43,480 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:35:43,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:43,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:35:43,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:35:43,480 INFO L87 Difference]: Start difference. First operand 101381 states and 305394 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:44,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:44,185 INFO L93 Difference]: Finished difference Result 102656 states and 308196 transitions. [2021-03-10 21:35:44,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:35:44,186 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:35:44,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:44,431 INFO L225 Difference]: With dead ends: 102656 [2021-03-10 21:35:44,431 INFO L226 Difference]: Without dead ends: 102656 [2021-03-10 21:35:44,431 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 315.1ms TimeCoverageRelationStatistics Valid=388, Invalid=802, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:35:44,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102656 states. [2021-03-10 21:35:46,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102656 to 101397. [2021-03-10 21:35:46,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101397 states, 101396 states have (on average 3.0123574894473153) internal successors, (305441), 101396 states have internal predecessors, (305441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:46,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101397 states to 101397 states and 305441 transitions. [2021-03-10 21:35:46,744 INFO L78 Accepts]: Start accepts. Automaton has 101397 states and 305441 transitions. Word has length 25 [2021-03-10 21:35:46,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:46,745 INFO L480 AbstractCegarLoop]: Abstraction has 101397 states and 305441 transitions. [2021-03-10 21:35:46,745 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:46,745 INFO L276 IsEmpty]: Start isEmpty. Operand 101397 states and 305441 transitions. [2021-03-10 21:35:46,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:46,778 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:46,778 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:46,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21907,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:46,979 INFO L428 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:46,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:46,979 INFO L82 PathProgramCache]: Analyzing trace with hash -397533942, now seen corresponding path program 515 times [2021-03-10 21:35:46,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:46,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544272831] [2021-03-10 21:35:46,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:46,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:47,153 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:47,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544272831] [2021-03-10 21:35:47,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916367177] [2021-03-10 21:35:47,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:47,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:35:47,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:47,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:35:47,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:47,272 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:47,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:47,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-03-10 21:35:47,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392362799] [2021-03-10 21:35:47,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:35:47,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:47,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:35:47,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:35:47,273 INFO L87 Difference]: Start difference. First operand 101397 states and 305441 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:48,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:48,166 INFO L93 Difference]: Finished difference Result 110696 states and 332237 transitions. [2021-03-10 21:35:48,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:35:48,615 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:35:48,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:48,940 INFO L225 Difference]: With dead ends: 110696 [2021-03-10 21:35:48,940 INFO L226 Difference]: Without dead ends: 110696 [2021-03-10 21:35:48,940 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 654 ImplicationChecksByTransitivity, 513.4ms TimeCoverageRelationStatistics Valid=770, Invalid=1486, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 21:35:49,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110696 states. [2021-03-10 21:35:50,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110696 to 108448. [2021-03-10 21:35:50,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108448 states, 108447 states have (on average 3.0117937794498695) internal successors, (326620), 108447 states have internal predecessors, (326620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:50,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108448 states to 108448 states and 326620 transitions. [2021-03-10 21:35:50,933 INFO L78 Accepts]: Start accepts. Automaton has 108448 states and 326620 transitions. Word has length 25 [2021-03-10 21:35:50,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:50,933 INFO L480 AbstractCegarLoop]: Abstraction has 108448 states and 326620 transitions. [2021-03-10 21:35:50,933 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:50,933 INFO L276 IsEmpty]: Start isEmpty. Operand 108448 states and 326620 transitions. [2021-03-10 21:35:50,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:50,969 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:50,969 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:51,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21908 [2021-03-10 21:35:51,169 INFO L428 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:51,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:51,169 INFO L82 PathProgramCache]: Analyzing trace with hash -1682186012, now seen corresponding path program 516 times [2021-03-10 21:35:51,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:51,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798364951] [2021-03-10 21:35:51,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:51,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 13 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:51,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798364951] [2021-03-10 21:35:51,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350762414] [2021-03-10 21:35:51,306 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:51,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:35:51,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:51,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:35:51,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:51,398 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 20 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:51,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:51,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:35:51,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586958167] [2021-03-10 21:35:51,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:35:51,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:51,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:35:51,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:35:51,399 INFO L87 Difference]: Start difference. First operand 108448 states and 326620 transitions. Second operand has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:52,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:52,474 INFO L93 Difference]: Finished difference Result 108755 states and 326973 transitions. [2021-03-10 21:35:52,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:35:52,475 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:35:52,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:52,700 INFO L225 Difference]: With dead ends: 108755 [2021-03-10 21:35:52,700 INFO L226 Difference]: Without dead ends: 108751 [2021-03-10 21:35:52,700 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 201.7ms TimeCoverageRelationStatistics Valid=245, Invalid=457, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:35:52,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108751 states. [2021-03-10 21:35:54,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108751 to 108448. [2021-03-10 21:35:54,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108448 states, 108447 states have (on average 3.0117476739789946) internal successors, (326615), 108447 states have internal predecessors, (326615), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:55,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108448 states to 108448 states and 326615 transitions. [2021-03-10 21:35:55,237 INFO L78 Accepts]: Start accepts. Automaton has 108448 states and 326615 transitions. Word has length 25 [2021-03-10 21:35:55,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:55,237 INFO L480 AbstractCegarLoop]: Abstraction has 108448 states and 326615 transitions. [2021-03-10 21:35:55,237 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8) internal successors, (27), 14 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:55,237 INFO L276 IsEmpty]: Start isEmpty. Operand 108448 states and 326615 transitions. [2021-03-10 21:35:55,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:55,283 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:55,283 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:55,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 518 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21909 [2021-03-10 21:35:55,484 INFO L428 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:55,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:55,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1141254500, now seen corresponding path program 517 times [2021-03-10 21:35:55,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:55,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071990481] [2021-03-10 21:35:55,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:55,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:55,661 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 21 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:55,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071990481] [2021-03-10 21:35:55,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944633216] [2021-03-10 21:35:55,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:55,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:55,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:35:55,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:55,787 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 22 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:55,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:55,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-03-10 21:35:55,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280786597] [2021-03-10 21:35:55,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 21:35:55,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:55,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 21:35:55,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:35:55,788 INFO L87 Difference]: Start difference. First operand 108448 states and 326615 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:56,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:35:56,663 INFO L93 Difference]: Finished difference Result 127339 states and 381935 transitions. [2021-03-10 21:35:56,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:35:56,665 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:35:56,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:35:56,968 INFO L225 Difference]: With dead ends: 127339 [2021-03-10 21:35:56,968 INFO L226 Difference]: Without dead ends: 127339 [2021-03-10 21:35:56,968 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 470.9ms TimeCoverageRelationStatistics Valid=665, Invalid=1315, Unknown=0, NotChecked=0, Total=1980 [2021-03-10 21:35:57,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127339 states. [2021-03-10 21:35:59,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127339 to 123604. [2021-03-10 21:35:59,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123604 states, 123603 states have (on average 3.0088428274394636) internal successors, (371902), 123603 states have internal predecessors, (371902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:59,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123604 states to 123604 states and 371902 transitions. [2021-03-10 21:35:59,580 INFO L78 Accepts]: Start accepts. Automaton has 123604 states and 371902 transitions. Word has length 25 [2021-03-10 21:35:59,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:35:59,580 INFO L480 AbstractCegarLoop]: Abstraction has 123604 states and 371902 transitions. [2021-03-10 21:35:59,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 19 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:35:59,580 INFO L276 IsEmpty]: Start isEmpty. Operand 123604 states and 371902 transitions. [2021-03-10 21:35:59,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:35:59,632 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:35:59,632 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:35:59,832 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21910 [2021-03-10 21:35:59,832 INFO L428 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:35:59,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:35:59,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1140074618, now seen corresponding path program 518 times [2021-03-10 21:35:59,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:35:59,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452130842] [2021-03-10 21:35:59,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:35:59,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:35:59,911 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 16 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:35:59,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452130842] [2021-03-10 21:35:59,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514482749] [2021-03-10 21:35:59,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:35:59,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:35:59,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:35:59,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:35:59,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:35:59,989 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:35:59,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:35:59,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:35:59,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714540430] [2021-03-10 21:35:59,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:35:59,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:35:59,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:35:59,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:35:59,989 INFO L87 Difference]: Start difference. First operand 123604 states and 371902 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:01,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:01,188 INFO L93 Difference]: Finished difference Result 123963 states and 372363 transitions. [2021-03-10 21:36:01,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:36:01,189 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:36:01,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:01,500 INFO L225 Difference]: With dead ends: 123963 [2021-03-10 21:36:01,500 INFO L226 Difference]: Without dead ends: 123959 [2021-03-10 21:36:01,500 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 183.2ms TimeCoverageRelationStatistics Valid=238, Invalid=412, Unknown=0, NotChecked=0, Total=650 [2021-03-10 21:36:01,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123959 states. [2021-03-10 21:36:03,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123959 to 123626. [2021-03-10 21:36:03,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123626 states, 123625 states have (on average 3.008865520728008) internal successors, (371971), 123625 states have internal predecessors, (371971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:04,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123626 states to 123626 states and 371971 transitions. [2021-03-10 21:36:04,308 INFO L78 Accepts]: Start accepts. Automaton has 123626 states and 371971 transitions. Word has length 25 [2021-03-10 21:36:04,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:04,308 INFO L480 AbstractCegarLoop]: Abstraction has 123626 states and 371971 transitions. [2021-03-10 21:36:04,308 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:04,308 INFO L276 IsEmpty]: Start isEmpty. Operand 123626 states and 371971 transitions. [2021-03-10 21:36:04,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:04,355 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:04,355 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:04,555 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21911,520 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:04,556 INFO L428 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:04,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:04,556 INFO L82 PathProgramCache]: Analyzing trace with hash 577674442, now seen corresponding path program 519 times [2021-03-10 21:36:04,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:04,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923223242] [2021-03-10 21:36:04,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:04,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:04,634 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 17 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:04,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923223242] [2021-03-10 21:36:04,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287489724] [2021-03-10 21:36:04,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:04,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 21:36:04,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:04,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:36:04,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:04,732 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 26 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:04,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:04,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-03-10 21:36:04,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426889844] [2021-03-10 21:36:04,733 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:36:04,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:04,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:36:04,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:36:04,733 INFO L87 Difference]: Start difference. First operand 123626 states and 371971 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:05,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:05,349 INFO L93 Difference]: Finished difference Result 126832 states and 380734 transitions. [2021-03-10 21:36:05,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:36:05,351 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:36:05,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:05,645 INFO L225 Difference]: With dead ends: 126832 [2021-03-10 21:36:05,645 INFO L226 Difference]: Without dead ends: 126832 [2021-03-10 21:36:05,645 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 152.8ms TimeCoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2021-03-10 21:36:05,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126832 states. [2021-03-10 21:36:07,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126832 to 123629. [2021-03-10 21:36:08,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123629 states, 123628 states have (on average 3.0088410392467724) internal successors, (371977), 123628 states have internal predecessors, (371977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:08,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123629 states to 123629 states and 371977 transitions. [2021-03-10 21:36:08,338 INFO L78 Accepts]: Start accepts. Automaton has 123629 states and 371977 transitions. Word has length 25 [2021-03-10 21:36:08,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:08,338 INFO L480 AbstractCegarLoop]: Abstraction has 123629 states and 371977 transitions. [2021-03-10 21:36:08,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 14 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:08,339 INFO L276 IsEmpty]: Start isEmpty. Operand 123629 states and 371977 transitions. [2021-03-10 21:36:08,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:08,390 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:08,390 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:08,590 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21912 [2021-03-10 21:36:08,591 INFO L428 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:08,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:08,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1151372892, now seen corresponding path program 520 times [2021-03-10 21:36:08,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:08,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498490447] [2021-03-10 21:36:08,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:08,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:08,671 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 17 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:08,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498490447] [2021-03-10 21:36:08,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040387540] [2021-03-10 21:36:08,671 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:08,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:36:08,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:08,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:36:08,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:08,782 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:08,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:08,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-03-10 21:36:08,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243410028] [2021-03-10 21:36:08,782 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:36:08,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:08,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:36:08,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:36:08,783 INFO L87 Difference]: Start difference. First operand 123629 states and 371977 transitions. Second operand has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:10,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:10,065 INFO L93 Difference]: Finished difference Result 129617 states and 388857 transitions. [2021-03-10 21:36:10,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 21:36:10,066 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:36:10,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:10,394 INFO L225 Difference]: With dead ends: 129617 [2021-03-10 21:36:10,394 INFO L226 Difference]: Without dead ends: 129617 [2021-03-10 21:36:10,394 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 239.0ms TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:36:10,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129617 states. [2021-03-10 21:36:12,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129617 to 123639. [2021-03-10 21:36:12,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123639 states, 123638 states have (on average 3.008816059787444) internal successors, (372004), 123638 states have internal predecessors, (372004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:13,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123639 states to 123639 states and 372004 transitions. [2021-03-10 21:36:13,241 INFO L78 Accepts]: Start accepts. Automaton has 123639 states and 372004 transitions. Word has length 25 [2021-03-10 21:36:13,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:13,241 INFO L480 AbstractCegarLoop]: Abstraction has 123639 states and 372004 transitions. [2021-03-10 21:36:13,242 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.75) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:13,242 INFO L276 IsEmpty]: Start isEmpty. Operand 123639 states and 372004 transitions. [2021-03-10 21:36:13,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:13,284 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:13,284 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:13,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21913,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:13,484 INFO L428 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:13,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:13,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1082734602, now seen corresponding path program 521 times [2021-03-10 21:36:13,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:13,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989346222] [2021-03-10 21:36:13,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:13,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:13,607 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 18 proven. 58 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:13,607 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989346222] [2021-03-10 21:36:13,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135804604] [2021-03-10 21:36:13,608 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:13,630 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 21:36:13,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:13,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:36:13,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:13,704 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 25 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:36:13,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:13,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:36:13,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315301289] [2021-03-10 21:36:13,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:36:13,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:13,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:36:13,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:36:13,705 INFO L87 Difference]: Start difference. First operand 123639 states and 372004 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:14,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:14,428 INFO L93 Difference]: Finished difference Result 132191 states and 396420 transitions. [2021-03-10 21:36:14,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:36:14,429 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:36:14,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:14,739 INFO L225 Difference]: With dead ends: 132191 [2021-03-10 21:36:14,739 INFO L226 Difference]: Without dead ends: 132191 [2021-03-10 21:36:14,740 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 281.8ms TimeCoverageRelationStatistics Valid=425, Invalid=765, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:36:14,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132191 states. [2021-03-10 21:36:17,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132191 to 123673. [2021-03-10 21:36:17,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123673 states, 123672 states have (on average 3.008417426741704) internal successors, (372057), 123672 states have internal predecessors, (372057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:17,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123673 states to 123673 states and 372057 transitions. [2021-03-10 21:36:17,500 INFO L78 Accepts]: Start accepts. Automaton has 123673 states and 372057 transitions. Word has length 25 [2021-03-10 21:36:17,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:36:17,500 INFO L480 AbstractCegarLoop]: Abstraction has 123673 states and 372057 transitions. [2021-03-10 21:36:17,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:17,500 INFO L276 IsEmpty]: Start isEmpty. Operand 123673 states and 372057 transitions. [2021-03-10 21:36:17,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-03-10 21:36:17,541 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:36:17,541 INFO L519 BasicCegarLoop]: trace histogram [10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:36:17,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21914,523 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:17,742 INFO L428 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:36:17,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:36:17,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1620590180, now seen corresponding path program 522 times [2021-03-10 21:36:17,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:36:17,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533015047] [2021-03-10 21:36:17,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:36:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:36:17,864 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 18 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:17,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533015047] [2021-03-10 21:36:17,864 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460540375] [2021-03-10 21:36:17,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:17,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 21:36:17,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:36:17,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 18 conjunts are in the unsatisfiable core [2021-03-10 21:36:17,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:36:18,000 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 24 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:36:18,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:36:18,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-03-10 21:36:18,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402605583] [2021-03-10 21:36:18,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:36:18,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:36:18,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:36:18,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:36:18,000 INFO L87 Difference]: Start difference. First operand 123673 states and 372057 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:36:19,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:36:19,376 INFO L93 Difference]: Finished difference Result 157749 states and 472892 transitions. [2021-03-10 21:36:19,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:36:19,377 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-03-10 21:36:19,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:36:19,737 INFO L225 Difference]: With dead ends: 157749 [2021-03-10 21:36:19,738 INFO L226 Difference]: Without dead ends: 157749 [2021-03-10 21:36:19,738 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 371.0ms TimeCoverageRelationStatistics Valid=469, Invalid=863, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 21:36:19,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157749 states. Received shutdown request... [2021-03-10 21:36:20,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21915,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:36:20,515 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-10 21:36:20,518 WARN L224 ceAbstractionStarter]: Timeout [2021-03-10 21:36:20,518 INFO L202 PluginConnector]: Adding new model unroll-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 09:36:20 BasicIcfg [2021-03-10 21:36:20,518 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 21:36:20,519 INFO L168 Benchmark]: Toolchain (without parser) took 794449.15 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 236.5 MB in the beginning and 8.1 GB in the end (delta: -7.9 GB). Peak memory consumption was 7.9 GB. Max. memory is 16.0 GB. [2021-03-10 21:36:20,519 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 255.9 MB. Free memory is still 237.4 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 21:36:20,519 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.84 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 21:36:20,519 INFO L168 Benchmark]: Boogie Preprocessor took 19.14 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 233.4 MB in the end (delta: 931.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 21:36:20,519 INFO L168 Benchmark]: RCFGBuilder took 237.10 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 235.9 MB in the end (delta: -2.5 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.0 GB. [2021-03-10 21:36:20,519 INFO L168 Benchmark]: TraceAbstraction took 794157.08 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 235.9 MB in the beginning and 8.1 GB in the end (delta: -7.9 GB). Peak memory consumption was 7.9 GB. Max. memory is 16.0 GB. [2021-03-10 21:36:20,519 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 255.9 MB. Free memory is still 237.4 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.84 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.4 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 19.14 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 233.4 MB in the end (delta: 931.7 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 237.10 ms. Allocated memory is still 255.9 MB. Free memory was 233.4 MB in the beginning and 235.9 MB in the end (delta: -2.5 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 794157.08 ms. Allocated memory was 255.9 MB in the beginning and 16.0 GB in the end (delta: 15.7 GB). Free memory was 235.9 MB in the beginning and 8.1 GB in the end (delta: -7.9 GB). Peak memory consumption was 7.9 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 53]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 53). Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 794094.0ms, OverallIterations: 526, TraceHistogramMax: 11, EmptinessCheckTime: 9458.0ms, AutomataDifference: 201031.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 14.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 10717 SDtfs, 45269 SDslu, 68336 SDs, 0 SdLazy, 81096 SolverSat, 14955 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 33608.6ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 23213 GetRequests, 10917 SyntacticMatches, 268 SemanticMatches, 12028 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81619 ImplicationChecksByTransitivity, 88338.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=269074occurred in iteration=456, InterpolantAutomatonStates: 10554, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 301637.2ms AutomataMinimizationTime, 526 MinimizatonAttempts, 2009001 StatesRemovedByMinimization, 521 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1649.2ms SsaConstructionTime, 5601.7ms SatisfiabilityAnalysisTime, 160799.0ms InterpolantComputationTime, 22369 NumberOfCodeBlocks, 22363 NumberOfCodeBlocksAsserted, 2330 NumberOfCheckSat, 21320 ConstructedInterpolants, 0 QuantifiedInterpolants, 96928 SizeOfPredicates, 279 NumberOfNonLiveVariables, 45883 ConjunctsInSsa, 7991 ConjunctsInUnsatCore, 1049 InterpolantComputations, 3 PerfectInterpolantSequences, 20771/53666 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown