/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-4.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d47b94137d5c7dd60722882962a90fb345e61909-d47b941 [2021-05-03 14:04:14,509 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-03 14:04:14,510 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-03 14:04:14,541 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-03 14:04:14,593 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 [2021-05-03 14:04:14,632 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-03 14:04:14,632 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-03 14:04:14,632 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-03 14:04:14,633 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-03 14:04:14,634 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-03 14:04:14,636 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-03 14:04:14,636 INFO L138 SettingsManager]: * Use SBE=true [2021-05-03 14:04:14,636 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-03 14:04:14,637 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-03 14:04:14,637 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-03 14:04:14,638 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-03 14:04:14,638 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-03 14:04:14,638 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-03 14:04:14,638 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-03 14:04:14,638 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-03 14:04:14,638 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-03 14:04:14,638 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-03 14:04:14,638 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-03 14:04:14,639 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-03 14:04:14,639 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-03 14:04:14,639 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-03 14:04:14,639 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-03 14:04:14,639 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-03 14:04:14,639 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-03 14:04:14,640 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-03 14:04:14,640 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-03 14:04:14,640 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-03 14:04:14,640 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-03 14:04:14,640 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-03 14:04:14,640 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-03 14:04:14,640 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-03 14:04:14,640 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-03 14:04:14,925 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-03 14:04:14,955 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-03 14:04:14,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-03 14:04:14,959 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-03 14:04:14,961 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-03 14:04:14,962 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-4.wvr.bpl [2021-05-03 14:04:14,962 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/unroll-4.wvr.bpl' [2021-05-03 14:04:14,983 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-03 14:04:14,994 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-03 14:04:14,995 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-03 14:04:14,996 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-03 14:04:14,996 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-03 14:04:15,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:14" (1/1) ... [2021-05-03 14:04:15,014 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:14" (1/1) ... [2021-05-03 14:04:15,024 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-03 14:04:15,025 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-03 14:04:15,025 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-03 14:04:15,026 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-03 14:04:15,032 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:14" (1/1) ... [2021-05-03 14:04:15,032 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:14" (1/1) ... [2021-05-03 14:04:15,033 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:14" (1/1) ... [2021-05-03 14:04:15,033 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:14" (1/1) ... [2021-05-03 14:04:15,035 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:14" (1/1) ... [2021-05-03 14:04:15,037 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:14" (1/1) ... [2021-05-03 14:04:15,038 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:14" (1/1) ... [2021-05-03 14:04:15,038 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-03 14:04:15,039 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-03 14:04:15,039 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-03 14:04:15,039 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-03 14:04:15,041 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:14" (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 [2021-05-03 14:04:15,097 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-03 14:04:15,098 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-03 14:04:15,098 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-03 14:04:15,099 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-03 14:04:15,099 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-03 14:04:15,099 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-03 14:04:15,099 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-03 14:04:15,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-03 14:04:15,099 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-03 14:04:15,100 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-03 14:04:15,343 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-03 14:04:15,344 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-05-03 14:04:15,344 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-05-03 14:04:15,345 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-05-03 14:04:15,346 INFO L202 PluginConnector]: Adding new model unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 02:04:15 BoogieIcfgContainer [2021-05-03 14:04:15,346 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-03 14:04:15,347 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-03 14:04:15,347 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-03 14:04:15,350 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-03 14:04:15,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 03.05 02:04:14" (1/2) ... [2021-05-03 14:04:15,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@269d108b and model type unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.05 02:04:15, skipping insertion in model container [2021-05-03 14:04:15,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.05 02:04:15" (2/2) ... [2021-05-03 14:04:15,352 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.bpl [2021-05-03 14:04:15,361 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-03 14:04:15,361 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-03 14:04:15,365 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-03 14:04:15,369 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-03 14:04:15,416 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-05-03 14:04:15,430 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-05-03 14:04:15,447 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-03 14:04:15,447 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-03 14:04:15,447 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-03 14:04:15,447 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-03 14:04:15,447 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-03 14:04:15,447 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-03 14:04:15,447 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-03 14:04:15,447 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-03 14:04:15,455 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 46 flow [2021-05-03 14:04:15,463 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) [2021-05-03 14:04:15,465 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) [2021-05-03 14:04:15,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-05-03 14:04:15,470 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:15,471 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:15,471 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:15,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:15,476 INFO L82 PathProgramCache]: Analyzing trace with hash -525039273, now seen corresponding path program 1 times [2021-05-03 14:04:15,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:15,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564245009] [2021-05-03 14:04:15,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:15,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:15,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:15,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564245009] [2021-05-03 14:04:15,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:04:15,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-05-03 14:04:15,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935804121] [2021-05-03 14:04:15,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-03 14:04:15,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:15,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-03 14:04:15,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 14:04:15,638 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) [2021-05-03 14:04:15,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:15,663 INFO L93 Difference]: Finished difference Result 22 states and 38 transitions. [2021-05-03 14:04:15,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-03 14:04:15,665 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 [2021-05-03 14:04:15,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:15,678 INFO L225 Difference]: With dead ends: 22 [2021-05-03 14:04:15,678 INFO L226 Difference]: Without dead ends: 19 [2021-05-03 14:04:15,679 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-03 14:04:15,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-05-03 14:04:15,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-05-03 14:04:15,704 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) [2021-05-03 14:04:15,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 33 transitions. [2021-05-03 14:04:15,706 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 33 transitions. Word has length 9 [2021-05-03 14:04:15,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:15,706 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 33 transitions. [2021-05-03 14:04:15,706 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) [2021-05-03 14:04:15,706 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 33 transitions. [2021-05-03 14:04:15,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-03 14:04:15,707 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:15,707 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:15,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-03 14:04:15,708 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:15,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:15,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1892497481, now seen corresponding path program 1 times [2021-05-03 14:04:15,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:15,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449880727] [2021-05-03 14:04:15,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:15,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:15,744 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:15,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449880727] [2021-05-03 14:04:15,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839184550] [2021-05-03 14:04:15,745 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 [2021-05-03 14:04:15,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:15,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-05-03 14:04:15,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:15,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:15,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:15,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 4 [2021-05-03 14:04:15,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276576035] [2021-05-03 14:04:15,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-03 14:04:15,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:15,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-03 14:04:15,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:04:15,894 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) [2021-05-03 14:04:15,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:15,930 INFO L93 Difference]: Finished difference Result 28 states and 45 transitions. [2021-05-03 14:04:15,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 14:04:15,930 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 [2021-05-03 14:04:15,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:15,931 INFO L225 Difference]: With dead ends: 28 [2021-05-03 14:04:15,931 INFO L226 Difference]: Without dead ends: 28 [2021-05-03 14:04:15,932 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.0ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-03 14:04:15,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-03 14:04:15,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 19. [2021-05-03 14:04:15,936 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) [2021-05-03 14:04:15,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 35 transitions. [2021-05-03 14:04:15,937 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 35 transitions. Word has length 10 [2021-05-03 14:04:15,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:15,937 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 35 transitions. [2021-05-03 14:04:15,937 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) [2021-05-03 14:04:15,938 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 35 transitions. [2021-05-03 14:04:15,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-03 14:04:15,938 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:15,938 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:16,161 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-05-03 14:04:16,162 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:16,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:16,163 INFO L82 PathProgramCache]: Analyzing trace with hash 904379190, now seen corresponding path program 1 times [2021-05-03 14:04:16,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:16,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812719903] [2021-05-03 14:04:16,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:16,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:16,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:16,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812719903] [2021-05-03 14:04:16,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:04:16,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 14:04:16,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396303699] [2021-05-03 14:04:16,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:04:16,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:16,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:04:16,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:04:16,203 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) [2021-05-03 14:04:16,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:16,242 INFO L93 Difference]: Finished difference Result 22 states and 36 transitions. [2021-05-03 14:04:16,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:04:16,244 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 [2021-05-03 14:04:16,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:16,248 INFO L225 Difference]: With dead ends: 22 [2021-05-03 14:04:16,248 INFO L226 Difference]: Without dead ends: 18 [2021-05-03 14:04:16,249 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-05-03 14:04:16,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-03 14:04:16,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-05-03 14:04:16,256 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) [2021-05-03 14:04:16,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 31 transitions. [2021-05-03 14:04:16,263 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 31 transitions. Word has length 10 [2021-05-03 14:04:16,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:16,263 INFO L480 AbstractCegarLoop]: Abstraction has 18 states and 31 transitions. [2021-05-03 14:04:16,263 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) [2021-05-03 14:04:16,263 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 31 transitions. [2021-05-03 14:04:16,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-05-03 14:04:16,264 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:16,264 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:16,264 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-03 14:04:16,264 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:16,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:16,265 INFO L82 PathProgramCache]: Analyzing trace with hash -974494568, now seen corresponding path program 2 times [2021-05-03 14:04:16,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:16,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023963265] [2021-05-03 14:04:16,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:16,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:16,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:16,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023963265] [2021-05-03 14:04:16,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-03 14:04:16,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-03 14:04:16,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141966262] [2021-05-03 14:04:16,296 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:04:16,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:16,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:04:16,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:04:16,297 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) [2021-05-03 14:04:16,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:16,315 INFO L93 Difference]: Finished difference Result 20 states and 35 transitions. [2021-05-03 14:04:16,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 14:04:16,316 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 [2021-05-03 14:04:16,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:16,317 INFO L225 Difference]: With dead ends: 20 [2021-05-03 14:04:16,317 INFO L226 Difference]: Without dead ends: 20 [2021-05-03 14:04:16,317 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:04:16,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-03 14:04:16,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-05-03 14:04:16,320 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) [2021-05-03 14:04:16,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 35 transitions. [2021-05-03 14:04:16,321 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 35 transitions. Word has length 10 [2021-05-03 14:04:16,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:16,321 INFO L480 AbstractCegarLoop]: Abstraction has 20 states and 35 transitions. [2021-05-03 14:04:16,321 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) [2021-05-03 14:04:16,321 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 35 transitions. [2021-05-03 14:04:16,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-05-03 14:04:16,322 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:16,322 INFO L551 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:16,322 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-03 14:04:16,322 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:16,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:16,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1462847702, now seen corresponding path program 1 times [2021-05-03 14:04:16,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:16,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447454787] [2021-05-03 14:04:16,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:16,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:16,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447454787] [2021-05-03 14:04:16,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378102462] [2021-05-03 14:04:16,373 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 [2021-05-03 14:04:16,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:16,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2021-05-03 14:04:16,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:16,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:16,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-05-03 14:04:16,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610784840] [2021-05-03 14:04:16,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-03 14:04:16,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:16,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-03 14:04:16,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:04:16,498 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) [2021-05-03 14:04:16,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:16,510 INFO L93 Difference]: Finished difference Result 24 states and 43 transitions. [2021-05-03 14:04:16,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-03 14:04:16,510 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 [2021-05-03 14:04:16,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:16,511 INFO L225 Difference]: With dead ends: 24 [2021-05-03 14:04:16,511 INFO L226 Difference]: Without dead ends: 24 [2021-05-03 14:04:16,511 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.8ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-03 14:04:16,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-03 14:04:16,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-05-03 14:04:16,514 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) [2021-05-03 14:04:16,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 43 transitions. [2021-05-03 14:04:16,515 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 43 transitions. Word has length 11 [2021-05-03 14:04:16,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:16,515 INFO L480 AbstractCegarLoop]: Abstraction has 24 states and 43 transitions. [2021-05-03 14:04:16,515 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) [2021-05-03 14:04:16,515 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 43 transitions. [2021-05-03 14:04:16,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-03 14:04:16,515 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:16,515 INFO L551 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:16,740 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:16,740 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:16,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:16,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1595502390, now seen corresponding path program 2 times [2021-05-03 14:04:16,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:16,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005124014] [2021-05-03 14:04:16,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:16,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:16,806 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:16,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005124014] [2021-05-03 14:04:16,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318462773] [2021-05-03 14:04:16,806 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 [2021-05-03 14:04:16,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:16,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:16,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-03 14:04:16,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:16,869 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:16,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:16,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-05-03 14:04:16,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497303484] [2021-05-03 14:04:16,870 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-03 14:04:16,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:16,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-03 14:04:16,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 14:04:16,871 INFO L87 Difference]: Start difference. First operand 24 states and 43 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:16,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:16,892 INFO L93 Difference]: Finished difference Result 28 states and 51 transitions. [2021-05-03 14:04:16,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-03 14:04:16,893 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have 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 [2021-05-03 14:04:16,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:16,893 INFO L225 Difference]: With dead ends: 28 [2021-05-03 14:04:16,894 INFO L226 Difference]: Without dead ends: 28 [2021-05-03 14:04:16,894 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 33.8ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-05-03 14:04:16,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-03 14:04:16,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-05-03 14:04:16,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 27 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:16,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 51 transitions. [2021-05-03 14:04:16,898 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 51 transitions. Word has length 12 [2021-05-03 14:04:16,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:16,898 INFO L480 AbstractCegarLoop]: Abstraction has 28 states and 51 transitions. [2021-05-03 14:04:16,898 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:16,898 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 51 transitions. [2021-05-03 14:04:16,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-05-03 14:04:16,899 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:16,899 INFO L551 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:17,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:17,113 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:17,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:17,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1412830422, now seen corresponding path program 3 times [2021-05-03 14:04:17,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:17,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224555786] [2021-05-03 14:04:17,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:17,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:17,194 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:17,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224555786] [2021-05-03 14:04:17,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [842775079] [2021-05-03 14:04:17,195 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 [2021-05-03 14:04:17,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:04:17,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:17,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-03 14:04:17,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:17,336 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:17,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:17,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-05-03 14:04:17,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203609205] [2021-05-03 14:04:17,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:04:17,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:17,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:04:17,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:17,339 INFO L87 Difference]: Start difference. First operand 28 states and 51 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) [2021-05-03 14:04:17,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:17,393 INFO L93 Difference]: Finished difference Result 32 states and 59 transitions. [2021-05-03 14:04:17,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-03 14:04:17,396 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 13 [2021-05-03 14:04:17,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:17,398 INFO L225 Difference]: With dead ends: 32 [2021-05-03 14:04:17,398 INFO L226 Difference]: Without dead ends: 32 [2021-05-03 14:04:17,399 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 62.5ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:17,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-03 14:04:17,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-05-03 14:04:17,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.903225806451613) internal successors, (59), 31 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:17,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 59 transitions. [2021-05-03 14:04:17,410 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 59 transitions. Word has length 13 [2021-05-03 14:04:17,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:17,410 INFO L480 AbstractCegarLoop]: Abstraction has 32 states and 59 transitions. [2021-05-03 14:04:17,411 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) [2021-05-03 14:04:17,411 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 59 transitions. [2021-05-03 14:04:17,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:04:17,412 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:17,412 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:17,616 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:17,617 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:17,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:17,617 INFO L82 PathProgramCache]: Analyzing trace with hash 44966710, now seen corresponding path program 4 times [2021-05-03 14:04:17,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:17,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074706293] [2021-05-03 14:04:17,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:17,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:17,683 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:17,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074706293] [2021-05-03 14:04:17,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928757894] [2021-05-03 14:04:17,684 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) [2021-05-03 14:04:17,712 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:17,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:17,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:04:17,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:17,891 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:17,892 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 [2021-05-03 14:04:17,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:17,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:17,977 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:17,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-05-03 14:04:17,983 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:17,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:17,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-03 14:04:17,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981872953] [2021-05-03 14:04:17,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:04:17,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:17,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:04:17,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:17,985 INFO L87 Difference]: Start difference. First operand 32 states and 59 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) [2021-05-03 14:04:18,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:18,077 INFO L93 Difference]: Finished difference Result 80 states and 142 transitions. [2021-05-03 14:04:18,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:04:18,077 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 14 [2021-05-03 14:04:18,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:18,081 INFO L225 Difference]: With dead ends: 80 [2021-05-03 14:04:18,081 INFO L226 Difference]: Without dead ends: 77 [2021-05-03 14:04:18,081 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:18,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-05-03 14:04:18,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 44. [2021-05-03 14:04:18,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 2.186046511627907) internal successors, (94), 43 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:18,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 94 transitions. [2021-05-03 14:04:18,094 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 94 transitions. Word has length 14 [2021-05-03 14:04:18,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:18,095 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 94 transitions. [2021-05-03 14:04:18,095 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) [2021-05-03 14:04:18,095 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 94 transitions. [2021-05-03 14:04:18,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:04:18,096 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:18,096 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:18,308 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:18,309 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:18,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:18,309 INFO L82 PathProgramCache]: Analyzing trace with hash 1649963104, now seen corresponding path program 5 times [2021-05-03 14:04:18,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:18,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457487470] [2021-05-03 14:04:18,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:18,352 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:18,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457487470] [2021-05-03 14:04:18,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892965116] [2021-05-03 14:04:18,353 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 [2021-05-03 14:04:18,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:04:18,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:18,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:04:18,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:18,512 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:18,512 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 [2021-05-03 14:04:18,602 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:18,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:18,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:18,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-05-03 14:04:18,615 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:18,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:18,615 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-03 14:04:18,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [941210250] [2021-05-03 14:04:18,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:04:18,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:18,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:04:18,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:18,616 INFO L87 Difference]: Start difference. First operand 44 states and 94 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) [2021-05-03 14:04:18,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:18,701 INFO L93 Difference]: Finished difference Result 89 states and 171 transitions. [2021-05-03 14:04:18,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:04:18,702 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 14 [2021-05-03 14:04:18,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:18,703 INFO L225 Difference]: With dead ends: 89 [2021-05-03 14:04:18,703 INFO L226 Difference]: Without dead ends: 86 [2021-05-03 14:04:18,703 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 79.0ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:18,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-03 14:04:18,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 51. [2021-05-03 14:04:18,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.38) internal successors, (119), 50 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:18,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 119 transitions. [2021-05-03 14:04:18,716 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 119 transitions. Word has length 14 [2021-05-03 14:04:18,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:18,717 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 119 transitions. [2021-05-03 14:04:18,717 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) [2021-05-03 14:04:18,718 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 119 transitions. [2021-05-03 14:04:18,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:04:18,722 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:18,722 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:18,936 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:18,937 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:18,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:18,937 INFO L82 PathProgramCache]: Analyzing trace with hash -2019211880, now seen corresponding path program 6 times [2021-05-03 14:04:18,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:18,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944915650] [2021-05-03 14:04:18,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:18,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:18,990 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:18,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944915650] [2021-05-03 14:04:18,991 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637718613] [2021-05-03 14:04:18,991 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 [2021-05-03 14:04:19,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:04:19,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:19,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:04:19,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:19,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:19,138 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 [2021-05-03 14:04:19,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:19,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:19,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:19,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-05-03 14:04:19,214 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:19,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:19,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-03 14:04:19,216 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192578996] [2021-05-03 14:04:19,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:04:19,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:19,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:04:19,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:19,217 INFO L87 Difference]: Start difference. First operand 51 states and 119 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) [2021-05-03 14:04:19,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:19,295 INFO L93 Difference]: Finished difference Result 98 states and 200 transitions. [2021-05-03 14:04:19,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:04:19,296 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 14 [2021-05-03 14:04:19,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:19,297 INFO L225 Difference]: With dead ends: 98 [2021-05-03 14:04:19,297 INFO L226 Difference]: Without dead ends: 95 [2021-05-03 14:04:19,298 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 77.9ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:19,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-05-03 14:04:19,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 59. [2021-05-03 14:04:19,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 2.5344827586206895) internal successors, (147), 58 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:19,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2021-05-03 14:04:19,312 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 14 [2021-05-03 14:04:19,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:19,313 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2021-05-03 14:04:19,313 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) [2021-05-03 14:04:19,313 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2021-05-03 14:04:19,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:04:19,313 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:19,313 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:19,514 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-05-03 14:04:19,515 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:19,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:19,515 INFO L82 PathProgramCache]: Analyzing trace with hash 200480608, now seen corresponding path program 7 times [2021-05-03 14:04:19,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:19,515 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97399654] [2021-05-03 14:04:19,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:19,548 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:19,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97399654] [2021-05-03 14:04:19,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802192961] [2021-05-03 14:04:19,549 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 [2021-05-03 14:04:19,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:19,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:04:19,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:19,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:19,684 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 [2021-05-03 14:04:19,731 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:19,733 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:19,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:19,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-05-03 14:04:19,741 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:19,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:19,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-03 14:04:19,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891283117] [2021-05-03 14:04:19,742 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:04:19,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:19,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:04:19,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:19,743 INFO L87 Difference]: Start difference. First operand 59 states and 147 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) [2021-05-03 14:04:19,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:19,807 INFO L93 Difference]: Finished difference Result 108 states and 232 transitions. [2021-05-03 14:04:19,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:04:19,807 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 14 [2021-05-03 14:04:19,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:19,808 INFO L225 Difference]: With dead ends: 108 [2021-05-03 14:04:19,808 INFO L226 Difference]: Without dead ends: 105 [2021-05-03 14:04:19,809 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:19,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-05-03 14:04:19,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 68. [2021-05-03 14:04:19,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.656716417910448) internal successors, (178), 67 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:19,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 178 transitions. [2021-05-03 14:04:19,812 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 178 transitions. Word has length 14 [2021-05-03 14:04:19,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:19,812 INFO L480 AbstractCegarLoop]: Abstraction has 68 states and 178 transitions. [2021-05-03 14:04:19,812 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) [2021-05-03 14:04:19,813 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 178 transitions. [2021-05-03 14:04:19,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-03 14:04:19,813 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:19,813 INFO L551 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:20,033 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-03 14:04:20,034 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:20,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:20,034 INFO L82 PathProgramCache]: Analyzing trace with hash 291471000, now seen corresponding path program 8 times [2021-05-03 14:04:20,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:20,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506275378] [2021-05-03 14:04:20,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:20,077 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:20,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506275378] [2021-05-03 14:04:20,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827046010] [2021-05-03 14:04:20,077 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 [2021-05-03 14:04:20,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:20,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:20,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:04:20,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:20,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:20,210 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 [2021-05-03 14:04:20,253 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:20,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:20,255 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:20,255 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:3 [2021-05-03 14:04:20,264 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:20,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:20,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-05-03 14:04:20,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094379920] [2021-05-03 14:04:20,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:04:20,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:20,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:04:20,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:20,265 INFO L87 Difference]: Start difference. First operand 68 states and 178 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) [2021-05-03 14:04:20,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:20,343 INFO L93 Difference]: Finished difference Result 119 states and 267 transitions. [2021-05-03 14:04:20,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:04:20,343 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 14 [2021-05-03 14:04:20,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:20,344 INFO L225 Difference]: With dead ends: 119 [2021-05-03 14:04:20,344 INFO L226 Difference]: Without dead ends: 116 [2021-05-03 14:04:20,345 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:20,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-03 14:04:20,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 79. [2021-05-03 14:04:20,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.730769230769231) internal successors, (213), 78 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:20,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 213 transitions. [2021-05-03 14:04:20,349 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 213 transitions. Word has length 14 [2021-05-03 14:04:20,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:20,349 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 213 transitions. [2021-05-03 14:04:20,349 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) [2021-05-03 14:04:20,349 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 213 transitions. [2021-05-03 14:04:20,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:20,350 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:20,350 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:20,572 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-05-03 14:04:20,573 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:20,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:20,573 INFO L82 PathProgramCache]: Analyzing trace with hash 590864598, now seen corresponding path program 9 times [2021-05-03 14:04:20,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:20,573 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989453383] [2021-05-03 14:04:20,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:20,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:20,627 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:20,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989453383] [2021-05-03 14:04:20,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688853185] [2021-05-03 14:04:20,627 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 [2021-05-03 14:04:20,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:04:20,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:20,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:20,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:20,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:20,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:20,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:04:20,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800041980] [2021-05-03 14:04:20,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:20,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:20,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:20,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:20,708 INFO L87 Difference]: Start difference. First operand 79 states and 213 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-05-03 14:04:20,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:20,827 INFO L93 Difference]: Finished difference Result 141 states and 295 transitions. [2021-05-03 14:04:20,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:04:20,827 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 15 [2021-05-03 14:04:20,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:20,830 INFO L225 Difference]: With dead ends: 141 [2021-05-03 14:04:20,830 INFO L226 Difference]: Without dead ends: 141 [2021-05-03 14:04:20,830 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:20,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-05-03 14:04:20,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 81. [2021-05-03 14:04:20,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.7375) internal successors, (219), 80 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:20,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 219 transitions. [2021-05-03 14:04:20,837 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 219 transitions. Word has length 15 [2021-05-03 14:04:20,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:20,851 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 219 transitions. [2021-05-03 14:04:20,851 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-05-03 14:04:20,860 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 219 transitions. [2021-05-03 14:04:20,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:20,861 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:20,861 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:21,082 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:21,083 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:21,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:21,083 INFO L82 PathProgramCache]: Analyzing trace with hash 1394695479, now seen corresponding path program 10 times [2021-05-03 14:04:21,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:21,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538428558] [2021-05-03 14:04:21,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:21,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:21,140 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:21,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538428558] [2021-05-03 14:04:21,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604662621] [2021-05-03 14:04:21,141 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 [2021-05-03 14:04:21,173 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:21,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:21,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:21,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:21,216 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:21,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:21,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:04:21,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882677534] [2021-05-03 14:04:21,217 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:21,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:21,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:21,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:21,218 INFO L87 Difference]: Start difference. First operand 81 states and 219 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-05-03 14:04:21,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:21,369 INFO L93 Difference]: Finished difference Result 161 states and 349 transitions. [2021-05-03 14:04:21,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:04:21,370 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 15 [2021-05-03 14:04:21,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:21,371 INFO L225 Difference]: With dead ends: 161 [2021-05-03 14:04:21,371 INFO L226 Difference]: Without dead ends: 156 [2021-05-03 14:04:21,371 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 107.8ms TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:04:21,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-03 14:04:21,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 98. [2021-05-03 14:04:21,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.731958762886598) internal successors, (265), 97 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:21,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 265 transitions. [2021-05-03 14:04:21,376 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 265 transitions. Word has length 15 [2021-05-03 14:04:21,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:21,376 INFO L480 AbstractCegarLoop]: Abstraction has 98 states and 265 transitions. [2021-05-03 14:04:21,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-05-03 14:04:21,376 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 265 transitions. [2021-05-03 14:04:21,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:21,377 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:21,377 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:21,598 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-05-03 14:04:21,598 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:21,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:21,599 INFO L82 PathProgramCache]: Analyzing trace with hash -359013994, now seen corresponding path program 11 times [2021-05-03 14:04:21,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:21,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453037030] [2021-05-03 14:04:21,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:21,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:21,653 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:21,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453037030] [2021-05-03 14:04:21,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814829643] [2021-05-03 14:04:21,654 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 [2021-05-03 14:04:21,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:04:21,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:21,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:21,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:21,722 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:21,723 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:21,723 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:04:21,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014174850] [2021-05-03 14:04:21,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:04:21,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:21,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:04:21,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:21,724 INFO L87 Difference]: Start difference. First operand 98 states and 265 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) [2021-05-03 14:04:21,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:21,815 INFO L93 Difference]: Finished difference Result 121 states and 296 transitions. [2021-05-03 14:04:21,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:04:21,815 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 15 [2021-05-03 14:04:21,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:21,816 INFO L225 Difference]: With dead ends: 121 [2021-05-03 14:04:21,817 INFO L226 Difference]: Without dead ends: 120 [2021-05-03 14:04:21,818 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:21,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-03 14:04:21,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 99. [2021-05-03 14:04:21,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.704081632653061) internal successors, (265), 98 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:21,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 265 transitions. [2021-05-03 14:04:21,824 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 265 transitions. Word has length 15 [2021-05-03 14:04:21,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:21,824 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 265 transitions. [2021-05-03 14:04:21,824 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) [2021-05-03 14:04:21,824 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 265 transitions. [2021-05-03 14:04:21,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:21,824 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:21,824 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:22,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:22,041 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:22,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:22,041 INFO L82 PathProgramCache]: Analyzing trace with hash 563404739, now seen corresponding path program 12 times [2021-05-03 14:04:22,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:22,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138736166] [2021-05-03 14:04:22,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:22,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:22,089 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:22,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138736166] [2021-05-03 14:04:22,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265342707] [2021-05-03 14:04:22,090 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 [2021-05-03 14:04:22,113 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:04:22,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:22,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:22,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:22,173 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:22,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:22,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:04:22,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734198047] [2021-05-03 14:04:22,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:04:22,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:22,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:04:22,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:22,175 INFO L87 Difference]: Start difference. First operand 99 states and 265 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) [2021-05-03 14:04:22,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:22,217 INFO L93 Difference]: Finished difference Result 166 states and 358 transitions. [2021-05-03 14:04:22,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:04:22,217 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 15 [2021-05-03 14:04:22,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:22,220 INFO L225 Difference]: With dead ends: 166 [2021-05-03 14:04:22,220 INFO L226 Difference]: Without dead ends: 166 [2021-05-03 14:04:22,220 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:22,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-03 14:04:22,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 99. [2021-05-03 14:04:22,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.704081632653061) internal successors, (265), 98 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:22,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 265 transitions. [2021-05-03 14:04:22,226 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 265 transitions. Word has length 15 [2021-05-03 14:04:22,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:22,226 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 265 transitions. [2021-05-03 14:04:22,226 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) [2021-05-03 14:04:22,226 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 265 transitions. [2021-05-03 14:04:22,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:22,227 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:22,227 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:22,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-05-03 14:04:22,449 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:22,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:22,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1473313992, now seen corresponding path program 13 times [2021-05-03 14:04:22,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:22,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359425663] [2021-05-03 14:04:22,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:22,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:22,503 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:22,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359425663] [2021-05-03 14:04:22,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163810518] [2021-05-03 14:04:22,503 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 [2021-05-03 14:04:22,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:22,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:22,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:22,561 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:22,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:22,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:04:22,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411323154] [2021-05-03 14:04:22,562 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:04:22,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:22,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:04:22,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:22,563 INFO L87 Difference]: Start difference. First operand 99 states and 265 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) [2021-05-03 14:04:22,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:22,623 INFO L93 Difference]: Finished difference Result 169 states and 365 transitions. [2021-05-03 14:04:22,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:04:22,624 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 15 [2021-05-03 14:04:22,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:22,624 INFO L225 Difference]: With dead ends: 169 [2021-05-03 14:04:22,625 INFO L226 Difference]: Without dead ends: 169 [2021-05-03 14:04:22,625 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:22,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-05-03 14:04:22,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 104. [2021-05-03 14:04:22,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.70873786407767) internal successors, (279), 103 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:22,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 279 transitions. [2021-05-03 14:04:22,629 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 279 transitions. Word has length 15 [2021-05-03 14:04:22,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:22,629 INFO L480 AbstractCegarLoop]: Abstraction has 104 states and 279 transitions. [2021-05-03 14:04:22,629 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) [2021-05-03 14:04:22,629 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 279 transitions. [2021-05-03 14:04:22,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:22,629 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:22,629 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:22,844 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:22,845 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:22,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:22,845 INFO L82 PathProgramCache]: Analyzing trace with hash -390023859, now seen corresponding path program 14 times [2021-05-03 14:04:22,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:22,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296699455] [2021-05-03 14:04:22,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:22,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:22,898 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:22,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296699455] [2021-05-03 14:04:22,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113104298] [2021-05-03 14:04:22,899 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 [2021-05-03 14:04:22,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:22,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:22,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:22,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:22,966 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:22,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:22,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:04:22,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797537085] [2021-05-03 14:04:22,967 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:04:22,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:22,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:04:22,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:22,968 INFO L87 Difference]: Start difference. First operand 104 states and 279 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) [2021-05-03 14:04:23,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:23,059 INFO L93 Difference]: Finished difference Result 177 states and 389 transitions. [2021-05-03 14:04:23,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:04:23,060 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 15 [2021-05-03 14:04:23,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:23,061 INFO L225 Difference]: With dead ends: 177 [2021-05-03 14:04:23,061 INFO L226 Difference]: Without dead ends: 175 [2021-05-03 14:04:23,061 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 60.5ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:23,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2021-05-03 14:04:23,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 110. [2021-05-03 14:04:23,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.761467889908257) internal successors, (301), 109 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:23,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 301 transitions. [2021-05-03 14:04:23,065 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 301 transitions. Word has length 15 [2021-05-03 14:04:23,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:23,065 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 301 transitions. [2021-05-03 14:04:23,065 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) [2021-05-03 14:04:23,065 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 301 transitions. [2021-05-03 14:04:23,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:23,066 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:23,066 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:23,280 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-05-03 14:04:23,281 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:23,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:23,281 INFO L82 PathProgramCache]: Analyzing trace with hash 266778318, now seen corresponding path program 15 times [2021-05-03 14:04:23,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:23,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773062511] [2021-05-03 14:04:23,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:23,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:23,324 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:23,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773062511] [2021-05-03 14:04:23,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409092377] [2021-05-03 14:04:23,324 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 [2021-05-03 14:04:23,348 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:04:23,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:23,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:23,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:23,384 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:23,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:23,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:04:23,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963962620] [2021-05-03 14:04:23,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:04:23,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:23,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:04:23,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:23,387 INFO L87 Difference]: Start difference. First operand 110 states and 301 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) [2021-05-03 14:04:23,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:23,472 INFO L93 Difference]: Finished difference Result 167 states and 373 transitions. [2021-05-03 14:04:23,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:04:23,473 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 15 [2021-05-03 14:04:23,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:23,485 INFO L225 Difference]: With dead ends: 167 [2021-05-03 14:04:23,485 INFO L226 Difference]: Without dead ends: 166 [2021-05-03 14:04:23,485 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 56.0ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:23,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-03 14:04:23,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 110. [2021-05-03 14:04:23,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.7522935779816513) internal successors, (300), 109 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:23,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 300 transitions. [2021-05-03 14:04:23,490 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 300 transitions. Word has length 15 [2021-05-03 14:04:23,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:23,490 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 300 transitions. [2021-05-03 14:04:23,491 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) [2021-05-03 14:04:23,491 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 300 transitions. [2021-05-03 14:04:23,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:23,493 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:23,493 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:23,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:23,705 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:23,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:23,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1189197051, now seen corresponding path program 16 times [2021-05-03 14:04:23,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:23,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446625537] [2021-05-03 14:04:23,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:23,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:23,745 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:23,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446625537] [2021-05-03 14:04:23,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112006795] [2021-05-03 14:04:23,746 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) [2021-05-03 14:04:23,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:23,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:23,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:23,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:23,820 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:23,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:23,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:04:23,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022148242] [2021-05-03 14:04:23,820 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:04:23,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:23,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:04:23,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:23,821 INFO L87 Difference]: Start difference. First operand 110 states and 300 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) [2021-05-03 14:04:23,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:23,865 INFO L93 Difference]: Finished difference Result 181 states and 397 transitions. [2021-05-03 14:04:23,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:04:23,866 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 15 [2021-05-03 14:04:23,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:23,867 INFO L225 Difference]: With dead ends: 181 [2021-05-03 14:04:23,867 INFO L226 Difference]: Without dead ends: 181 [2021-05-03 14:04:23,867 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 34.4ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:23,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-05-03 14:04:23,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 110. [2021-05-03 14:04:23,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 2.7522935779816513) internal successors, (300), 109 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:23,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 300 transitions. [2021-05-03 14:04:23,871 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 300 transitions. Word has length 15 [2021-05-03 14:04:23,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:23,871 INFO L480 AbstractCegarLoop]: Abstraction has 110 states and 300 transitions. [2021-05-03 14:04:23,871 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) [2021-05-03 14:04:23,871 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 300 transitions. [2021-05-03 14:04:23,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:23,872 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:23,872 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:24,084 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-05-03 14:04:24,085 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:24,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:24,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1977391626, now seen corresponding path program 17 times [2021-05-03 14:04:24,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:24,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415909688] [2021-05-03 14:04:24,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:24,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:24,136 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:24,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415909688] [2021-05-03 14:04:24,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893723812] [2021-05-03 14:04:24,136 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 [2021-05-03 14:04:24,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:04:24,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:24,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:24,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:24,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:24,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:24,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:04:24,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019408745] [2021-05-03 14:04:24,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:24,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:24,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:24,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:24,192 INFO L87 Difference]: Start difference. First operand 110 states and 300 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-05-03 14:04:24,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:24,287 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2021-05-03 14:04:24,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:04:24,288 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 15 [2021-05-03 14:04:24,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:24,289 INFO L225 Difference]: With dead ends: 148 [2021-05-03 14:04:24,289 INFO L226 Difference]: Without dead ends: 146 [2021-05-03 14:04:24,289 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:24,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-03 14:04:24,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 111. [2021-05-03 14:04:24,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.7363636363636363) internal successors, (301), 110 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:24,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 301 transitions. [2021-05-03 14:04:24,292 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 301 transitions. Word has length 15 [2021-05-03 14:04:24,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:24,293 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 301 transitions. [2021-05-03 14:04:24,293 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-05-03 14:04:24,293 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 301 transitions. [2021-05-03 14:04:24,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:24,293 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:24,293 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:24,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-05-03 14:04:24,517 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:24,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:24,517 INFO L82 PathProgramCache]: Analyzing trace with hash -539850283, now seen corresponding path program 18 times [2021-05-03 14:04:24,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:24,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728062081] [2021-05-03 14:04:24,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:24,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:24,559 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:24,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728062081] [2021-05-03 14:04:24,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449698293] [2021-05-03 14:04:24,560 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 [2021-05-03 14:04:24,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:04:24,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:24,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:24,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:24,645 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:24,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:24,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:04:24,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396752577] [2021-05-03 14:04:24,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:24,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:24,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:24,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:24,646 INFO L87 Difference]: Start difference. First operand 111 states and 301 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-05-03 14:04:24,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:24,721 INFO L93 Difference]: Finished difference Result 194 states and 419 transitions. [2021-05-03 14:04:24,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:04:24,722 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 15 [2021-05-03 14:04:24,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:24,723 INFO L225 Difference]: With dead ends: 194 [2021-05-03 14:04:24,723 INFO L226 Difference]: Without dead ends: 194 [2021-05-03 14:04:24,724 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 55.4ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:24,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-03 14:04:24,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 111. [2021-05-03 14:04:24,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 2.7363636363636363) internal successors, (301), 110 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:24,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 301 transitions. [2021-05-03 14:04:24,729 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 301 transitions. Word has length 15 [2021-05-03 14:04:24,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:24,729 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 301 transitions. [2021-05-03 14:04:24,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-05-03 14:04:24,729 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 301 transitions. [2021-05-03 14:04:24,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:24,730 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:24,730 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:24,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:24,945 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:24,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:24,945 INFO L82 PathProgramCache]: Analyzing trace with hash 746378496, now seen corresponding path program 19 times [2021-05-03 14:04:24,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:24,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41994583] [2021-05-03 14:04:24,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:24,983 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:24,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41994583] [2021-05-03 14:04:24,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411877907] [2021-05-03 14:04:24,983 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 [2021-05-03 14:04:25,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:25,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:25,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:25,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:25,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:04:25,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818863025] [2021-05-03 14:04:25,065 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:04:25,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:25,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:04:25,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:25,066 INFO L87 Difference]: Start difference. First operand 111 states and 301 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) [2021-05-03 14:04:25,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:25,110 INFO L93 Difference]: Finished difference Result 186 states and 412 transitions. [2021-05-03 14:04:25,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:04:25,111 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 15 [2021-05-03 14:04:25,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:25,111 INFO L225 Difference]: With dead ends: 186 [2021-05-03 14:04:25,111 INFO L226 Difference]: Without dead ends: 186 [2021-05-03 14:04:25,112 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:04:25,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-03 14:04:25,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 116. [2021-05-03 14:04:25,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.756521739130435) internal successors, (317), 115 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:25,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 317 transitions. [2021-05-03 14:04:25,116 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 317 transitions. Word has length 15 [2021-05-03 14:04:25,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:25,116 INFO L480 AbstractCegarLoop]: Abstraction has 116 states and 317 transitions. [2021-05-03 14:04:25,116 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) [2021-05-03 14:04:25,116 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 317 transitions. [2021-05-03 14:04:25,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:25,116 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:25,116 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:25,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-05-03 14:04:25,329 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:25,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:25,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1829668629, now seen corresponding path program 20 times [2021-05-03 14:04:25,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:25,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474569586] [2021-05-03 14:04:25,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:25,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:25,375 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:25,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474569586] [2021-05-03 14:04:25,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772727887] [2021-05-03 14:04:25,376 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-05-03 14:04:25,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:25,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:25,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:25,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:25,449 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:25,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:25,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:04:25,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012487612] [2021-05-03 14:04:25,450 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:04:25,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:25,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:04:25,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:25,450 INFO L87 Difference]: Start difference. First operand 116 states and 317 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) [2021-05-03 14:04:25,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:25,543 INFO L93 Difference]: Finished difference Result 190 states and 428 transitions. [2021-05-03 14:04:25,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:04:25,543 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 15 [2021-05-03 14:04:25,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:25,544 INFO L225 Difference]: With dead ends: 190 [2021-05-03 14:04:25,544 INFO L226 Difference]: Without dead ends: 188 [2021-05-03 14:04:25,545 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:25,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-03 14:04:25,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 124. [2021-05-03 14:04:25,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.8048780487804876) internal successors, (345), 123 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:25,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 345 transitions. [2021-05-03 14:04:25,548 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 345 transitions. Word has length 15 [2021-05-03 14:04:25,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:25,548 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 345 transitions. [2021-05-03 14:04:25,549 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) [2021-05-03 14:04:25,549 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 345 transitions. [2021-05-03 14:04:25,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:25,549 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:25,549 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:25,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:25,771 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:25,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:25,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1808496490, now seen corresponding path program 21 times [2021-05-03 14:04:25,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:25,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983793002] [2021-05-03 14:04:25,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:25,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:25,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983793002] [2021-05-03 14:04:25,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360147156] [2021-05-03 14:04:25,816 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 [2021-05-03 14:04:25,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:04:25,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:25,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:25,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:25,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:25,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:25,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:04:25,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612712969] [2021-05-03 14:04:25,869 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:04:25,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:25,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:04:25,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:25,870 INFO L87 Difference]: Start difference. First operand 124 states and 345 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) [2021-05-03 14:04:25,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:25,952 INFO L93 Difference]: Finished difference Result 188 states and 429 transitions. [2021-05-03 14:04:25,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:04:25,953 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 15 [2021-05-03 14:04:25,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:25,954 INFO L225 Difference]: With dead ends: 188 [2021-05-03 14:04:25,954 INFO L226 Difference]: Without dead ends: 187 [2021-05-03 14:04:25,954 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 58.7ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:25,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2021-05-03 14:04:25,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 124. [2021-05-03 14:04:25,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.796747967479675) internal successors, (344), 123 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:25,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 344 transitions. [2021-05-03 14:04:25,959 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 344 transitions. Word has length 15 [2021-05-03 14:04:25,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:25,959 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 344 transitions. [2021-05-03 14:04:25,959 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) [2021-05-03 14:04:25,959 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 344 transitions. [2021-05-03 14:04:25,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:25,959 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:25,960 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:26,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:26,173 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:26,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:26,173 INFO L82 PathProgramCache]: Analyzing trace with hash -886077757, now seen corresponding path program 22 times [2021-05-03 14:04:26,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:26,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418006205] [2021-05-03 14:04:26,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:26,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:26,219 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:26,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418006205] [2021-05-03 14:04:26,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563303069] [2021-05-03 14:04:26,219 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 [2021-05-03 14:04:26,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:26,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:26,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:26,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:26,270 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:26,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:26,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:04:26,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122256029] [2021-05-03 14:04:26,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:04:26,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:26,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:04:26,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:26,271 INFO L87 Difference]: Start difference. First operand 124 states and 344 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) [2021-05-03 14:04:26,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:26,316 INFO L93 Difference]: Finished difference Result 191 states and 431 transitions. [2021-05-03 14:04:26,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:04:26,316 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 15 [2021-05-03 14:04:26,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:26,317 INFO L225 Difference]: With dead ends: 191 [2021-05-03 14:04:26,317 INFO L226 Difference]: Without dead ends: 191 [2021-05-03 14:04:26,317 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 31.5ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:26,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-03 14:04:26,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 124. [2021-05-03 14:04:26,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.796747967479675) internal successors, (344), 123 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:26,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 344 transitions. [2021-05-03 14:04:26,327 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 344 transitions. Word has length 15 [2021-05-03 14:04:26,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:26,327 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 344 transitions. [2021-05-03 14:04:26,328 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) [2021-05-03 14:04:26,328 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 344 transitions. [2021-05-03 14:04:26,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:26,328 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:26,328 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:26,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-05-03 14:04:26,550 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:26,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:26,550 INFO L82 PathProgramCache]: Analyzing trace with hash -97883182, now seen corresponding path program 23 times [2021-05-03 14:04:26,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:26,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325419501] [2021-05-03 14:04:26,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:26,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:26,588 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:26,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325419501] [2021-05-03 14:04:26,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509925085] [2021-05-03 14:04:26,588 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 [2021-05-03 14:04:26,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:04:26,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:26,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:26,606 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:26,657 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:26,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:26,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:04:26,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094470647] [2021-05-03 14:04:26,658 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:26,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:26,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:26,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:26,661 INFO L87 Difference]: Start difference. First operand 124 states and 344 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-05-03 14:04:26,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:26,775 INFO L93 Difference]: Finished difference Result 193 states and 435 transitions. [2021-05-03 14:04:26,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:04:26,775 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 15 [2021-05-03 14:04:26,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:26,776 INFO L225 Difference]: With dead ends: 193 [2021-05-03 14:04:26,776 INFO L226 Difference]: Without dead ends: 191 [2021-05-03 14:04:26,776 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:26,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2021-05-03 14:04:26,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 124. [2021-05-03 14:04:26,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.7886178861788617) internal successors, (343), 123 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:26,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 343 transitions. [2021-05-03 14:04:26,780 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 343 transitions. Word has length 15 [2021-05-03 14:04:26,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:26,780 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 343 transitions. [2021-05-03 14:04:26,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-05-03 14:04:26,780 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 343 transitions. [2021-05-03 14:04:26,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:26,782 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:26,782 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:26,996 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:26,997 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:26,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:26,997 INFO L82 PathProgramCache]: Analyzing trace with hash 1679842205, now seen corresponding path program 24 times [2021-05-03 14:04:26,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:26,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280414088] [2021-05-03 14:04:26,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:27,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:27,040 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:27,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280414088] [2021-05-03 14:04:27,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049707717] [2021-05-03 14:04:27,041 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) [2021-05-03 14:04:27,069 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:04:27,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:27,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:27,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:27,114 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:27,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:27,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:04:27,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270771200] [2021-05-03 14:04:27,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:27,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:27,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:27,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:27,115 INFO L87 Difference]: Start difference. First operand 124 states and 343 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-05-03 14:04:27,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:27,184 INFO L93 Difference]: Finished difference Result 200 states and 445 transitions. [2021-05-03 14:04:27,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:04:27,185 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 15 [2021-05-03 14:04:27,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:27,186 INFO L225 Difference]: With dead ends: 200 [2021-05-03 14:04:27,186 INFO L226 Difference]: Without dead ends: 200 [2021-05-03 14:04:27,186 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:27,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-03 14:04:27,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 124. [2021-05-03 14:04:27,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.7886178861788617) internal successors, (343), 123 states have internal predecessors, (343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:27,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 343 transitions. [2021-05-03 14:04:27,190 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 343 transitions. Word has length 15 [2021-05-03 14:04:27,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:27,190 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 343 transitions. [2021-05-03 14:04:27,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-05-03 14:04:27,190 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 343 transitions. [2021-05-03 14:04:27,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:27,190 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:27,191 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:27,412 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-05-03 14:04:27,412 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:27,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:27,412 INFO L82 PathProgramCache]: Analyzing trace with hash 1391521814, now seen corresponding path program 25 times [2021-05-03 14:04:27,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:27,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144522322] [2021-05-03 14:04:27,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:27,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:27,452 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:27,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144522322] [2021-05-03 14:04:27,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571846283] [2021-05-03 14:04:27,453 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 [2021-05-03 14:04:27,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:27,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:27,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:27,509 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:27,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:27,510 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:04:27,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413945575] [2021-05-03 14:04:27,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:27,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:27,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:27,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:27,511 INFO L87 Difference]: Start difference. First operand 124 states and 343 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-05-03 14:04:27,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:27,580 INFO L93 Difference]: Finished difference Result 157 states and 418 transitions. [2021-05-03 14:04:27,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:04:27,581 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 15 [2021-05-03 14:04:27,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:27,582 INFO L225 Difference]: With dead ends: 157 [2021-05-03 14:04:27,582 INFO L226 Difference]: Without dead ends: 154 [2021-05-03 14:04:27,583 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:27,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-03 14:04:27,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2021-05-03 14:04:27,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 2.7804878048780486) internal successors, (342), 123 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:27,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 342 transitions. [2021-05-03 14:04:27,587 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 342 transitions. Word has length 15 [2021-05-03 14:04:27,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:27,587 INFO L480 AbstractCegarLoop]: Abstraction has 124 states and 342 transitions. [2021-05-03 14:04:27,587 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-05-03 14:04:27,587 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 342 transitions. [2021-05-03 14:04:27,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:27,587 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:27,587 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:27,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-05-03 14:04:27,801 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:27,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:27,801 INFO L82 PathProgramCache]: Analyzing trace with hash -381017597, now seen corresponding path program 26 times [2021-05-03 14:04:27,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:27,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590499993] [2021-05-03 14:04:27,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:27,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:27,844 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:27,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590499993] [2021-05-03 14:04:27,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [184912689] [2021-05-03 14:04:27,845 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) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:27,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:27,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:27,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:27,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:27,910 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:27,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:27,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:04:27,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755124594] [2021-05-03 14:04:27,911 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:27,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:27,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:27,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:27,912 INFO L87 Difference]: Start difference. First operand 124 states and 342 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-05-03 14:04:28,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:28,018 INFO L93 Difference]: Finished difference Result 208 states and 481 transitions. [2021-05-03 14:04:28,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:04:28,018 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 15 [2021-05-03 14:04:28,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:28,019 INFO L225 Difference]: With dead ends: 208 [2021-05-03 14:04:28,019 INFO L226 Difference]: Without dead ends: 208 [2021-05-03 14:04:28,019 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:28,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-05-03 14:04:28,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 134. [2021-05-03 14:04:28,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 2.827067669172932) internal successors, (376), 133 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:28,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 376 transitions. [2021-05-03 14:04:28,024 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 376 transitions. Word has length 15 [2021-05-03 14:04:28,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:28,025 INFO L480 AbstractCegarLoop]: Abstraction has 134 states and 376 transitions. [2021-05-03 14:04:28,025 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-05-03 14:04:28,025 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 376 transitions. [2021-05-03 14:04:28,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:28,025 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:28,025 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:28,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-05-03 14:04:28,248 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:28,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:28,248 INFO L82 PathProgramCache]: Analyzing trace with hash 837368888, now seen corresponding path program 27 times [2021-05-03 14:04:28,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:28,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939293653] [2021-05-03 14:04:28,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:28,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:28,286 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:28,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939293653] [2021-05-03 14:04:28,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545776812] [2021-05-03 14:04:28,287 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 [2021-05-03 14:04:28,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:04:28,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:28,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:28,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:28,340 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:28,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:28,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:04:28,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333271614] [2021-05-03 14:04:28,340 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:04:28,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:28,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:04:28,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:28,341 INFO L87 Difference]: Start difference. First operand 134 states and 376 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) [2021-05-03 14:04:28,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:28,393 INFO L93 Difference]: Finished difference Result 216 states and 502 transitions. [2021-05-03 14:04:28,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:04:28,393 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 15 [2021-05-03 14:04:28,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:28,394 INFO L225 Difference]: With dead ends: 216 [2021-05-03 14:04:28,394 INFO L226 Difference]: Without dead ends: 216 [2021-05-03 14:04:28,395 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:28,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-03 14:04:28,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 139. [2021-05-03 14:04:28,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 2.8550724637681157) internal successors, (394), 138 states have internal predecessors, (394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:28,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 394 transitions. [2021-05-03 14:04:28,398 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 394 transitions. Word has length 15 [2021-05-03 14:04:28,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:28,399 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 394 transitions. [2021-05-03 14:04:28,399 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) [2021-05-03 14:04:28,399 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 394 transitions. [2021-05-03 14:04:28,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:28,399 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:28,399 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:28,609 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-05-03 14:04:28,609 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:28,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:28,609 INFO L82 PathProgramCache]: Analyzing trace with hash 1920659021, now seen corresponding path program 28 times [2021-05-03 14:04:28,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:28,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871002479] [2021-05-03 14:04:28,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:28,658 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:28,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871002479] [2021-05-03 14:04:28,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135178244] [2021-05-03 14:04:28,683 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 [2021-05-03 14:04:28,703 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:28,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:28,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:28,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:28,734 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:28,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:28,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:04:28,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100995219] [2021-05-03 14:04:28,735 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:04:28,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:28,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:04:28,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:28,736 INFO L87 Difference]: Start difference. First operand 139 states and 394 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) [2021-05-03 14:04:28,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:28,826 INFO L93 Difference]: Finished difference Result 221 states and 533 transitions. [2021-05-03 14:04:28,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:04:28,826 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 15 [2021-05-03 14:04:28,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:28,827 INFO L225 Difference]: With dead ends: 221 [2021-05-03 14:04:28,827 INFO L226 Difference]: Without dead ends: 219 [2021-05-03 14:04:28,829 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:28,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-05-03 14:04:28,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 157. [2021-05-03 14:04:28,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.9166666666666665) internal successors, (455), 156 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:28,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 455 transitions. [2021-05-03 14:04:28,834 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 455 transitions. Word has length 15 [2021-05-03 14:04:28,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:28,834 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 455 transitions. [2021-05-03 14:04:28,834 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) [2021-05-03 14:04:28,834 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 455 transitions. [2021-05-03 14:04:28,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:28,835 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:28,835 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:29,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,30 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:29,057 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:29,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:29,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1717506098, now seen corresponding path program 29 times [2021-05-03 14:04:29,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:29,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673061582] [2021-05-03 14:04:29,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:29,107 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:29,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673061582] [2021-05-03 14:04:29,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459265382] [2021-05-03 14:04:29,107 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 [2021-05-03 14:04:29,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:04:29,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:29,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:29,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:29,174 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:29,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:29,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:04:29,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400786504] [2021-05-03 14:04:29,174 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:04:29,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:29,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:04:29,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:29,175 INFO L87 Difference]: Start difference. First operand 157 states and 455 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) [2021-05-03 14:04:29,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:29,272 INFO L93 Difference]: Finished difference Result 232 states and 558 transitions. [2021-05-03 14:04:29,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:04:29,273 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 15 [2021-05-03 14:04:29,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:29,274 INFO L225 Difference]: With dead ends: 232 [2021-05-03 14:04:29,274 INFO L226 Difference]: Without dead ends: 231 [2021-05-03 14:04:29,275 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 71.5ms TimeCoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:29,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-05-03 14:04:29,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 157. [2021-05-03 14:04:29,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 2.9038461538461537) internal successors, (453), 156 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:29,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 453 transitions. [2021-05-03 14:04:29,280 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 453 transitions. Word has length 15 [2021-05-03 14:04:29,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:29,280 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 453 transitions. [2021-05-03 14:04:29,280 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) [2021-05-03 14:04:29,280 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 453 transitions. [2021-05-03 14:04:29,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:29,281 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:29,281 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:29,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:29,503 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:29,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:29,503 INFO L82 PathProgramCache]: Analyzing trace with hash -795087365, now seen corresponding path program 30 times [2021-05-03 14:04:29,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:29,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308120624] [2021-05-03 14:04:29,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:29,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:29,541 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:29,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308120624] [2021-05-03 14:04:29,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180416034] [2021-05-03 14:04:29,541 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 [2021-05-03 14:04:29,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:04:29,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:29,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:29,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:29,606 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:29,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:29,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:04:29,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489854792] [2021-05-03 14:04:29,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:04:29,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:29,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:04:29,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:29,608 INFO L87 Difference]: Start difference. First operand 157 states and 453 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) [2021-05-03 14:04:29,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:29,646 INFO L93 Difference]: Finished difference Result 220 states and 530 transitions. [2021-05-03 14:04:29,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:04:29,647 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 15 [2021-05-03 14:04:29,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:29,648 INFO L225 Difference]: With dead ends: 220 [2021-05-03 14:04:29,648 INFO L226 Difference]: Without dead ends: 220 [2021-05-03 14:04:29,648 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:29,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-05-03 14:04:29,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 156. [2021-05-03 14:04:29,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8967741935483873) internal successors, (449), 155 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:29,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 449 transitions. [2021-05-03 14:04:29,652 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 449 transitions. Word has length 15 [2021-05-03 14:04:29,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:29,652 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 449 transitions. [2021-05-03 14:04:29,652 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) [2021-05-03 14:04:29,652 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 449 transitions. [2021-05-03 14:04:29,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:29,653 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:29,653 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:29,872 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:29,873 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:29,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:29,873 INFO L82 PathProgramCache]: Analyzing trace with hash -6892790, now seen corresponding path program 31 times [2021-05-03 14:04:29,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:29,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425853289] [2021-05-03 14:04:29,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:29,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:29,915 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:29,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425853289] [2021-05-03 14:04:29,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42852917] [2021-05-03 14:04:29,916 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 [2021-05-03 14:04:29,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:29,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:29,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:29,972 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:29,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:29,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:04:29,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739916468] [2021-05-03 14:04:29,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:29,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:29,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:29,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:29,974 INFO L87 Difference]: Start difference. First operand 156 states and 449 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-05-03 14:04:30,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:30,076 INFO L93 Difference]: Finished difference Result 236 states and 559 transitions. [2021-05-03 14:04:30,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:04:30,077 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 15 [2021-05-03 14:04:30,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:30,078 INFO L225 Difference]: With dead ends: 236 [2021-05-03 14:04:30,078 INFO L226 Difference]: Without dead ends: 234 [2021-05-03 14:04:30,079 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 70.0ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:30,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-05-03 14:04:30,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 156. [2021-05-03 14:04:30,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.890322580645161) internal successors, (448), 155 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:30,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 448 transitions. [2021-05-03 14:04:30,083 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 448 transitions. Word has length 15 [2021-05-03 14:04:30,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:30,084 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 448 transitions. [2021-05-03 14:04:30,084 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-05-03 14:04:30,084 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 448 transitions. [2021-05-03 14:04:30,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:30,084 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:30,084 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:30,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-05-03 14:04:30,285 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:30,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:30,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1770832597, now seen corresponding path program 32 times [2021-05-03 14:04:30,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:30,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46659629] [2021-05-03 14:04:30,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:30,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:30,322 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:30,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46659629] [2021-05-03 14:04:30,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755410231] [2021-05-03 14:04:30,322 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 [2021-05-03 14:04:30,339 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:30,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:30,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:30,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:30,376 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:30,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:30,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:04:30,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981202550] [2021-05-03 14:04:30,377 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:30,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:30,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:30,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:30,379 INFO L87 Difference]: Start difference. First operand 156 states and 448 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-05-03 14:04:30,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:30,449 INFO L93 Difference]: Finished difference Result 225 states and 538 transitions. [2021-05-03 14:04:30,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:04:30,449 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 15 [2021-05-03 14:04:30,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:30,450 INFO L225 Difference]: With dead ends: 225 [2021-05-03 14:04:30,450 INFO L226 Difference]: Without dead ends: 225 [2021-05-03 14:04:30,451 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:30,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2021-05-03 14:04:30,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 156. [2021-05-03 14:04:30,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.890322580645161) internal successors, (448), 155 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:30,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 448 transitions. [2021-05-03 14:04:30,455 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 448 transitions. Word has length 15 [2021-05-03 14:04:30,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:30,455 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 448 transitions. [2021-05-03 14:04:30,455 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-05-03 14:04:30,455 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 448 transitions. [2021-05-03 14:04:30,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:30,455 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:30,455 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:30,669 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:30,669 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:30,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:30,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1482512206, now seen corresponding path program 33 times [2021-05-03 14:04:30,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:30,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405077212] [2021-05-03 14:04:30,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:30,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:30,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405077212] [2021-05-03 14:04:30,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493943795] [2021-05-03 14:04:30,712 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 [2021-05-03 14:04:30,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:04:30,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:30,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:30,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:30,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:30,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:30,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:04:30,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024868541] [2021-05-03 14:04:30,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:30,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:30,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:30,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:30,768 INFO L87 Difference]: Start difference. First operand 156 states and 448 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-05-03 14:04:30,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:30,837 INFO L93 Difference]: Finished difference Result 210 states and 549 transitions. [2021-05-03 14:04:30,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:04:30,837 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 15 [2021-05-03 14:04:30,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:30,838 INFO L225 Difference]: With dead ends: 210 [2021-05-03 14:04:30,838 INFO L226 Difference]: Without dead ends: 207 [2021-05-03 14:04:30,838 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 67.0ms TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:04:30,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-05-03 14:04:30,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 156. [2021-05-03 14:04:30,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8838709677419354) internal successors, (447), 155 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:30,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 447 transitions. [2021-05-03 14:04:30,843 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 447 transitions. Word has length 15 [2021-05-03 14:04:30,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:30,843 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 447 transitions. [2021-05-03 14:04:30,844 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-05-03 14:04:30,844 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 447 transitions. [2021-05-03 14:04:30,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:30,844 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:30,844 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:31,060 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-05-03 14:04:31,061 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:31,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:31,061 INFO L82 PathProgramCache]: Analyzing trace with hash -290027205, now seen corresponding path program 34 times [2021-05-03 14:04:31,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:31,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066059174] [2021-05-03 14:04:31,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:31,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:31,122 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:31,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066059174] [2021-05-03 14:04:31,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636089345] [2021-05-03 14:04:31,122 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) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:31,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:31,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:31,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:31,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:31,182 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:31,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:31,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:04:31,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042865349] [2021-05-03 14:04:31,184 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:31,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:31,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:31,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:31,184 INFO L87 Difference]: Start difference. First operand 156 states and 447 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-05-03 14:04:31,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:31,269 INFO L93 Difference]: Finished difference Result 201 states and 501 transitions. [2021-05-03 14:04:31,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:04:31,273 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 15 [2021-05-03 14:04:31,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:31,274 INFO L225 Difference]: With dead ends: 201 [2021-05-03 14:04:31,274 INFO L226 Difference]: Without dead ends: 201 [2021-05-03 14:04:31,274 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:31,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-05-03 14:04:31,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 156. [2021-05-03 14:04:31,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8838709677419354) internal successors, (447), 155 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:31,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 447 transitions. [2021-05-03 14:04:31,278 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 447 transitions. Word has length 15 [2021-05-03 14:04:31,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:31,278 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 447 transitions. [2021-05-03 14:04:31,279 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-05-03 14:04:31,279 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 447 transitions. [2021-05-03 14:04:31,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:31,279 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:31,279 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:31,502 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:31,502 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:31,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:31,502 INFO L82 PathProgramCache]: Analyzing trace with hash 409426826, now seen corresponding path program 35 times [2021-05-03 14:04:31,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:31,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647815403] [2021-05-03 14:04:31,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:31,540 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:31,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647815403] [2021-05-03 14:04:31,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811623176] [2021-05-03 14:04:31,540 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) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:31,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:04:31,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:31,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:31,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:31,620 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:31,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:31,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:04:31,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569888163] [2021-05-03 14:04:31,621 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:31,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:31,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:31,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:31,621 INFO L87 Difference]: Start difference. First operand 156 states and 447 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-05-03 14:04:31,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:31,697 INFO L93 Difference]: Finished difference Result 199 states and 536 transitions. [2021-05-03 14:04:31,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:04:31,698 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 15 [2021-05-03 14:04:31,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:31,699 INFO L225 Difference]: With dead ends: 199 [2021-05-03 14:04:31,699 INFO L226 Difference]: Without dead ends: 195 [2021-05-03 14:04:31,699 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 68.6ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:04:31,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-05-03 14:04:31,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 156. [2021-05-03 14:04:31,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 2.8774193548387097) internal successors, (446), 155 states have internal predecessors, (446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:31,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 446 transitions. [2021-05-03 14:04:31,703 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 446 transitions. Word has length 15 [2021-05-03 14:04:31,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:31,703 INFO L480 AbstractCegarLoop]: Abstraction has 156 states and 446 transitions. [2021-05-03 14:04:31,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-05-03 14:04:31,703 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 446 transitions. [2021-05-03 14:04:31,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:31,704 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:31,704 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:31,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-05-03 14:04:31,917 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:31,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:31,917 INFO L82 PathProgramCache]: Analyzing trace with hash 247828373, now seen corresponding path program 36 times [2021-05-03 14:04:31,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:31,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646360928] [2021-05-03 14:04:31,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:31,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:31,958 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:31,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646360928] [2021-05-03 14:04:31,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546484075] [2021-05-03 14:04:31,959 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) [2021-05-03 14:04:31,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-03 14:04:31,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:31,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:31,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:32,024 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:32,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:32,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:04:32,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291488581] [2021-05-03 14:04:32,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:32,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:32,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:32,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:32,026 INFO L87 Difference]: Start difference. First operand 156 states and 446 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-05-03 14:04:32,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:32,149 INFO L93 Difference]: Finished difference Result 212 states and 544 transitions. [2021-05-03 14:04:32,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:04:32,149 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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 15 [2021-05-03 14:04:32,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:32,150 INFO L225 Difference]: With dead ends: 212 [2021-05-03 14:04:32,150 INFO L226 Difference]: Without dead ends: 212 [2021-05-03 14:04:32,150 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:04:32,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-03 14:04:32,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 162. [2021-05-03 14:04:32,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 2.888198757763975) internal successors, (465), 161 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:32,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 465 transitions. [2021-05-03 14:04:32,154 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 465 transitions. Word has length 15 [2021-05-03 14:04:32,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:32,154 INFO L480 AbstractCegarLoop]: Abstraction has 162 states and 465 transitions. [2021-05-03 14:04:32,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 9 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) [2021-05-03 14:04:32,155 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 465 transitions. [2021-05-03 14:04:32,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:32,155 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:32,155 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:32,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-05-03 14:04:32,373 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:32,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:32,373 INFO L82 PathProgramCache]: Analyzing trace with hash -636896256, now seen corresponding path program 37 times [2021-05-03 14:04:32,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:32,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594582439] [2021-05-03 14:04:32,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:32,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:32,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594582439] [2021-05-03 14:04:32,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913671425] [2021-05-03 14:04:32,411 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 [2021-05-03 14:04:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:32,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:32,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:32,467 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:32,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:32,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:04:32,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926940712] [2021-05-03 14:04:32,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:04:32,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:32,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:04:32,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:32,468 INFO L87 Difference]: Start difference. First operand 162 states and 465 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) [2021-05-03 14:04:32,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:32,506 INFO L93 Difference]: Finished difference Result 260 states and 622 transitions. [2021-05-03 14:04:32,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:04:32,506 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 15 [2021-05-03 14:04:32,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:32,507 INFO L225 Difference]: With dead ends: 260 [2021-05-03 14:04:32,507 INFO L226 Difference]: Without dead ends: 260 [2021-05-03 14:04:32,508 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 33.3ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:32,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-05-03 14:04:32,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 168. [2021-05-03 14:04:32,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 2.9221556886227544) internal successors, (488), 167 states have internal predecessors, (488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:32,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 488 transitions. [2021-05-03 14:04:32,513 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 488 transitions. Word has length 15 [2021-05-03 14:04:32,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:32,513 INFO L480 AbstractCegarLoop]: Abstraction has 168 states and 488 transitions. [2021-05-03 14:04:32,513 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) [2021-05-03 14:04:32,513 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 488 transitions. [2021-05-03 14:04:32,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:32,514 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:32,514 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:32,736 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-05-03 14:04:32,737 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:32,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:32,737 INFO L82 PathProgramCache]: Analyzing trace with hash 446393877, now seen corresponding path program 38 times [2021-05-03 14:04:32,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:32,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965569349] [2021-05-03 14:04:32,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:32,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:32,777 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:32,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965569349] [2021-05-03 14:04:32,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219808312] [2021-05-03 14:04:32,778 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 [2021-05-03 14:04:32,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:32,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:32,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:32,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:32,838 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:32,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:32,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:04:32,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813683698] [2021-05-03 14:04:32,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:04:32,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:32,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:04:32,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:32,840 INFO L87 Difference]: Start difference. First operand 168 states and 488 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) [2021-05-03 14:04:32,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:32,934 INFO L93 Difference]: Finished difference Result 258 states and 649 transitions. [2021-05-03 14:04:32,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:04:32,935 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 15 [2021-05-03 14:04:32,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:32,936 INFO L225 Difference]: With dead ends: 258 [2021-05-03 14:04:32,936 INFO L226 Difference]: Without dead ends: 256 [2021-05-03 14:04:32,936 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 62.0ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:32,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-03 14:04:32,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 195. [2021-05-03 14:04:32,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9742268041237114) internal successors, (577), 194 states have internal predecessors, (577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:32,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 577 transitions. [2021-05-03 14:04:32,941 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 577 transitions. Word has length 15 [2021-05-03 14:04:32,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:32,941 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 577 transitions. [2021-05-03 14:04:32,941 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) [2021-05-03 14:04:32,941 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 577 transitions. [2021-05-03 14:04:32,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:32,942 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:32,942 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:33,156 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:33,157 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:33,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:33,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1103196054, now seen corresponding path program 39 times [2021-05-03 14:04:33,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:33,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335414148] [2021-05-03 14:04:33,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:33,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:33,195 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:33,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335414148] [2021-05-03 14:04:33,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081264042] [2021-05-03 14:04:33,195 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 [2021-05-03 14:04:33,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:04:33,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:33,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:33,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:33,247 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:33,248 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:33,248 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:04:33,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822085434] [2021-05-03 14:04:33,248 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:04:33,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:33,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:04:33,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:33,249 INFO L87 Difference]: Start difference. First operand 195 states and 577 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) [2021-05-03 14:04:33,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:33,339 INFO L93 Difference]: Finished difference Result 275 states and 689 transitions. [2021-05-03 14:04:33,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:04:33,339 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 15 [2021-05-03 14:04:33,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:33,340 INFO L225 Difference]: With dead ends: 275 [2021-05-03 14:04:33,340 INFO L226 Difference]: Without dead ends: 274 [2021-05-03 14:04:33,341 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 64.3ms TimeCoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:33,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-05-03 14:04:33,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 195. [2021-05-03 14:04:33,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 2.9690721649484537) internal successors, (576), 194 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:33,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 576 transitions. [2021-05-03 14:04:33,345 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 576 transitions. Word has length 15 [2021-05-03 14:04:33,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:33,347 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 576 transitions. [2021-05-03 14:04:33,347 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) [2021-05-03 14:04:33,347 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 576 transitions. [2021-05-03 14:04:33,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:33,348 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:33,348 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:33,560 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:33,561 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:33,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:33,561 INFO L82 PathProgramCache]: Analyzing trace with hash 2025614787, now seen corresponding path program 40 times [2021-05-03 14:04:33,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:33,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846680950] [2021-05-03 14:04:33,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:33,599 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:33,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846680950] [2021-05-03 14:04:33,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495802628] [2021-05-03 14:04:33,599 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 [2021-05-03 14:04:33,616 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:33,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:33,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:33,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:33,652 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:33,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:33,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-05-03 14:04:33,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722529730] [2021-05-03 14:04:33,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-03 14:04:33,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:33,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-03 14:04:33,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-05-03 14:04:33,654 INFO L87 Difference]: Start difference. First operand 195 states and 576 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) [2021-05-03 14:04:33,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:33,704 INFO L93 Difference]: Finished difference Result 245 states and 630 transitions. [2021-05-03 14:04:33,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:04:33,705 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 15 [2021-05-03 14:04:33,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:33,706 INFO L225 Difference]: With dead ends: 245 [2021-05-03 14:04:33,706 INFO L226 Difference]: Without dead ends: 245 [2021-05-03 14:04:33,706 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:33,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-05-03 14:04:33,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 194. [2021-05-03 14:04:33,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.9533678756476682) internal successors, (570), 193 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:33,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 570 transitions. [2021-05-03 14:04:33,709 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 570 transitions. Word has length 15 [2021-05-03 14:04:33,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:33,709 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 570 transitions. [2021-05-03 14:04:33,710 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) [2021-05-03 14:04:33,710 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 570 transitions. [2021-05-03 14:04:33,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:33,710 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:33,710 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:33,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,42 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:33,927 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:33,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:33,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1481157934, now seen corresponding path program 41 times [2021-05-03 14:04:33,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:33,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382800435] [2021-05-03 14:04:33,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:33,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:33,958 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:33,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382800435] [2021-05-03 14:04:33,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245101565] [2021-05-03 14:04:33,958 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 [2021-05-03 14:04:33,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-03 14:04:33,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:33,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:33,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:34,035 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:34,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:34,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:04:34,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397093895] [2021-05-03 14:04:34,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:34,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:34,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:34,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:34,036 INFO L87 Difference]: Start difference. First operand 194 states and 570 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) [2021-05-03 14:04:34,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:34,134 INFO L93 Difference]: Finished difference Result 279 states and 689 transitions. [2021-05-03 14:04:34,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:04:34,134 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 15 [2021-05-03 14:04:34,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:34,135 INFO L225 Difference]: With dead ends: 279 [2021-05-03 14:04:34,135 INFO L226 Difference]: Without dead ends: 277 [2021-05-03 14:04:34,136 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 64.1ms TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:34,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-05-03 14:04:34,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 194. [2021-05-03 14:04:34,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.948186528497409) internal successors, (569), 193 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:34,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 569 transitions. [2021-05-03 14:04:34,140 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 569 transitions. Word has length 15 [2021-05-03 14:04:34,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:34,140 INFO L480 AbstractCegarLoop]: Abstraction has 194 states and 569 transitions. [2021-05-03 14:04:34,140 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) [2021-05-03 14:04:34,140 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 569 transitions. [2021-05-03 14:04:34,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:34,141 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:34,141 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:34,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:34,357 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:34,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:34,357 INFO L82 PathProgramCache]: Analyzing trace with hash 296567453, now seen corresponding path program 42 times [2021-05-03 14:04:34,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:34,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099080474] [2021-05-03 14:04:34,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:34,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:34,399 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:34,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099080474] [2021-05-03 14:04:34,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245552846] [2021-05-03 14:04:34,400 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 [2021-05-03 14:04:34,431 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:04:34,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:34,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:34,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:34,468 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:34,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:34,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:04:34,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847650667] [2021-05-03 14:04:34,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:34,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:34,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:34,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:34,470 INFO L87 Difference]: Start difference. First operand 194 states and 569 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) [2021-05-03 14:04:34,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:34,540 INFO L93 Difference]: Finished difference Result 248 states and 633 transitions. [2021-05-03 14:04:34,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:04:34,541 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 15 [2021-05-03 14:04:34,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:34,541 INFO L225 Difference]: With dead ends: 248 [2021-05-03 14:04:34,541 INFO L226 Difference]: Without dead ends: 248 [2021-05-03 14:04:34,542 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 56.8ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:34,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-03 14:04:34,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 192. [2021-05-03 14:04:34,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.9424083769633507) internal successors, (562), 191 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:34,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 562 transitions. [2021-05-03 14:04:34,545 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 562 transitions. Word has length 15 [2021-05-03 14:04:34,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:34,545 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 562 transitions. [2021-05-03 14:04:34,545 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) [2021-05-03 14:04:34,545 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 562 transitions. [2021-05-03 14:04:34,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:34,546 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:34,546 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:34,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:34,769 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:34,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:34,769 INFO L82 PathProgramCache]: Analyzing trace with hash 8247062, now seen corresponding path program 43 times [2021-05-03 14:04:34,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:34,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432430709] [2021-05-03 14:04:34,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:34,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:34,803 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:34,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432430709] [2021-05-03 14:04:34,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721065560] [2021-05-03 14:04:34,804 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 [2021-05-03 14:04:34,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:34,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:34,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:34,861 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:34,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:34,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:04:34,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989032002] [2021-05-03 14:04:34,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:34,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:34,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:34,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:34,862 INFO L87 Difference]: Start difference. First operand 192 states and 562 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) [2021-05-03 14:04:34,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:34,934 INFO L93 Difference]: Finished difference Result 252 states and 674 transitions. [2021-05-03 14:04:34,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:04:34,934 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 15 [2021-05-03 14:04:34,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:34,935 INFO L225 Difference]: With dead ends: 252 [2021-05-03 14:04:34,935 INFO L226 Difference]: Without dead ends: 249 [2021-05-03 14:04:34,935 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 60.0ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:34,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-05-03 14:04:34,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 192. [2021-05-03 14:04:34,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 2.93717277486911) internal successors, (561), 191 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:34,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 561 transitions. [2021-05-03 14:04:34,939 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 561 transitions. Word has length 15 [2021-05-03 14:04:34,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:34,939 INFO L480 AbstractCegarLoop]: Abstraction has 192 states and 561 transitions. [2021-05-03 14:04:34,939 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) [2021-05-03 14:04:34,939 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 561 transitions. [2021-05-03 14:04:34,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:34,939 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:34,940 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:35,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-05-03 14:04:35,162 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:35,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:35,163 INFO L82 PathProgramCache]: Analyzing trace with hash -1764292349, now seen corresponding path program 44 times [2021-05-03 14:04:35,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:35,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289708434] [2021-05-03 14:04:35,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:35,202 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:35,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289708434] [2021-05-03 14:04:35,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393391308] [2021-05-03 14:04:35,202 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 [2021-05-03 14:04:35,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:35,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:35,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:35,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:35,267 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:35,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:35,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:04:35,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717675673] [2021-05-03 14:04:35,267 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:35,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:35,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:35,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:35,268 INFO L87 Difference]: Start difference. First operand 192 states and 561 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) [2021-05-03 14:04:35,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:35,334 INFO L93 Difference]: Finished difference Result 226 states and 602 transitions. [2021-05-03 14:04:35,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:04:35,335 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 15 [2021-05-03 14:04:35,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:35,335 INFO L225 Difference]: With dead ends: 226 [2021-05-03 14:04:35,335 INFO L226 Difference]: Without dead ends: 226 [2021-05-03 14:04:35,336 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 59.9ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:35,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-03 14:04:35,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 189. [2021-05-03 14:04:35,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.9308510638297873) internal successors, (551), 188 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:35,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 551 transitions. [2021-05-03 14:04:35,339 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 551 transitions. Word has length 15 [2021-05-03 14:04:35,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:35,339 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 551 transitions. [2021-05-03 14:04:35,339 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) [2021-05-03 14:04:35,339 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 551 transitions. [2021-05-03 14:04:35,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:35,340 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:35,340 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:35,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:35,557 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:35,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:35,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1064838318, now seen corresponding path program 45 times [2021-05-03 14:04:35,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:35,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831660892] [2021-05-03 14:04:35,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:35,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:35,595 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:35,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831660892] [2021-05-03 14:04:35,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843852601] [2021-05-03 14:04:35,595 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 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 [2021-05-03 14:04:35,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-03 14:04:35,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:35,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:35,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:35,659 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:35,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:35,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:04:35,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277145783] [2021-05-03 14:04:35,660 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:35,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:35,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:35,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:35,660 INFO L87 Difference]: Start difference. First operand 189 states and 551 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) [2021-05-03 14:04:35,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:35,732 INFO L93 Difference]: Finished difference Result 241 states and 654 transitions. [2021-05-03 14:04:35,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:04:35,732 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 15 [2021-05-03 14:04:35,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:35,733 INFO L225 Difference]: With dead ends: 241 [2021-05-03 14:04:35,733 INFO L226 Difference]: Without dead ends: 237 [2021-05-03 14:04:35,733 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 64.9ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:35,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-05-03 14:04:35,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 189. [2021-05-03 14:04:35,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.925531914893617) internal successors, (550), 188 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:35,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 550 transitions. [2021-05-03 14:04:35,737 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 550 transitions. Word has length 15 [2021-05-03 14:04:35,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:35,737 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 550 transitions. [2021-05-03 14:04:35,737 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) [2021-05-03 14:04:35,737 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 550 transitions. [2021-05-03 14:04:35,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:35,738 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:35,738 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:35,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-05-03 14:04:35,949 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:35,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:35,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1226436771, now seen corresponding path program 46 times [2021-05-03 14:04:35,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:35,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88741736] [2021-05-03 14:04:35,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:35,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:35,987 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:35,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88741736] [2021-05-03 14:04:35,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706920430] [2021-05-03 14:04:35,987 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 [2021-05-03 14:04:36,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:36,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:36,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:36,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:36,045 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:36,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:36,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:04:36,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461024883] [2021-05-03 14:04:36,045 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:36,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:36,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:36,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:36,046 INFO L87 Difference]: Start difference. First operand 189 states and 550 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) [2021-05-03 14:04:36,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:36,159 INFO L93 Difference]: Finished difference Result 216 states and 593 transitions. [2021-05-03 14:04:36,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:04:36,159 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 15 [2021-05-03 14:04:36,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:36,160 INFO L225 Difference]: With dead ends: 216 [2021-05-03 14:04:36,160 INFO L226 Difference]: Without dead ends: 216 [2021-05-03 14:04:36,160 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 93.5ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:04:36,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-03 14:04:36,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 189. [2021-05-03 14:04:36,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 2.925531914893617) internal successors, (550), 188 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:36,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 550 transitions. [2021-05-03 14:04:36,164 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 550 transitions. Word has length 15 [2021-05-03 14:04:36,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:36,164 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 550 transitions. [2021-05-03 14:04:36,164 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) [2021-05-03 14:04:36,164 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 550 transitions. [2021-05-03 14:04:36,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:36,164 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:36,164 INFO L551 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:36,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:36,373 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:36,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:36,373 INFO L82 PathProgramCache]: Analyzing trace with hash 29253270, now seen corresponding path program 47 times [2021-05-03 14:04:36,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:36,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897841283] [2021-05-03 14:04:36,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:36,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:36,410 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:36,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897841283] [2021-05-03 14:04:36,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270242769] [2021-05-03 14:04:36,410 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 [2021-05-03 14:04:36,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:04:36,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:36,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:36,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:36,460 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:36,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:36,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:04:36,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166266629] [2021-05-03 14:04:36,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:36,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:36,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:36,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:36,461 INFO L87 Difference]: Start difference. First operand 189 states and 550 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) [2021-05-03 14:04:36,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:36,535 INFO L93 Difference]: Finished difference Result 234 states and 644 transitions. [2021-05-03 14:04:36,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:04:36,536 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 15 [2021-05-03 14:04:36,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:36,537 INFO L225 Difference]: With dead ends: 234 [2021-05-03 14:04:36,537 INFO L226 Difference]: Without dead ends: 229 [2021-05-03 14:04:36,537 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:36,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-05-03 14:04:36,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 188. [2021-05-03 14:04:36,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 2.93048128342246) internal successors, (548), 187 states have internal predecessors, (548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:36,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 548 transitions. [2021-05-03 14:04:36,540 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 548 transitions. Word has length 15 [2021-05-03 14:04:36,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:36,540 INFO L480 AbstractCegarLoop]: Abstraction has 188 states and 548 transitions. [2021-05-03 14:04:36,540 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) [2021-05-03 14:04:36,540 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 548 transitions. [2021-05-03 14:04:36,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-05-03 14:04:36,541 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:36,541 INFO L551 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:36,764 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-05-03 14:04:36,764 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:36,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:36,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1732783037, now seen corresponding path program 48 times [2021-05-03 14:04:36,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:36,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713252321] [2021-05-03 14:04:36,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:36,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:36,803 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:36,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713252321] [2021-05-03 14:04:36,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137881785] [2021-05-03 14:04:36,804 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 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 [2021-05-03 14:04:36,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:04:36,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:36,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjunts are in the unsatisfiable core [2021-05-03 14:04:36,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:36,859 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:36,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:36,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-05-03 14:04:36,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141393673] [2021-05-03 14:04:36,860 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-03 14:04:36,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:36,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-03 14:04:36,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-05-03 14:04:36,860 INFO L87 Difference]: Start difference. First operand 188 states and 548 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) [2021-05-03 14:04:36,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:36,976 INFO L93 Difference]: Finished difference Result 251 states and 681 transitions. [2021-05-03 14:04:36,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:04:36,976 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 15 [2021-05-03 14:04:36,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:36,977 INFO L225 Difference]: With dead ends: 251 [2021-05-03 14:04:36,977 INFO L226 Difference]: Without dead ends: 251 [2021-05-03 14:04:36,977 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:04:36,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-05-03 14:04:36,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 196. [2021-05-03 14:04:36,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 195 states have (on average 2.923076923076923) internal successors, (570), 195 states have internal predecessors, (570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:36,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 570 transitions. [2021-05-03 14:04:36,981 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 570 transitions. Word has length 15 [2021-05-03 14:04:36,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:36,981 INFO L480 AbstractCegarLoop]: Abstraction has 196 states and 570 transitions. [2021-05-03 14:04:36,982 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) [2021-05-03 14:04:36,982 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 570 transitions. [2021-05-03 14:04:36,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-03 14:04:36,982 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:36,982 INFO L551 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:37,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-05-03 14:04:37,189 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:37,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:37,189 INFO L82 PathProgramCache]: Analyzing trace with hash 1137660823, now seen corresponding path program 49 times [2021-05-03 14:04:37,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:37,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119012411] [2021-05-03 14:04:37,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:37,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:37,260 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:37,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119012411] [2021-05-03 14:04:37,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515362715] [2021-05-03 14:04:37,260 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) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:37,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:37,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:04:37,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:37,348 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:37,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:37,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-05-03 14:04:37,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229360856] [2021-05-03 14:04:37,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:04:37,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:37,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:04:37,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:37,349 INFO L87 Difference]: Start difference. First operand 196 states and 570 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) [2021-05-03 14:04:37,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:37,398 INFO L93 Difference]: Finished difference Result 378 states and 1058 transitions. [2021-05-03 14:04:37,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-03 14:04:37,399 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 16 [2021-05-03 14:04:37,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:37,400 INFO L225 Difference]: With dead ends: 378 [2021-05-03 14:04:37,400 INFO L226 Difference]: Without dead ends: 378 [2021-05-03 14:04:37,400 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:04:37,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-05-03 14:04:37,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 234. [2021-05-03 14:04:37,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.8583690987124464) internal successors, (666), 233 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:37,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 666 transitions. [2021-05-03 14:04:37,408 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 666 transitions. Word has length 16 [2021-05-03 14:04:37,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:37,408 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 666 transitions. [2021-05-03 14:04:37,408 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) [2021-05-03 14:04:37,408 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 666 transitions. [2021-05-03 14:04:37,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-05-03 14:04:37,409 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:37,409 INFO L551 BasicCegarLoop]: trace histogram [6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:37,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-05-03 14:04:37,630 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:37,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:37,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1759521079, now seen corresponding path program 50 times [2021-05-03 14:04:37,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:37,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562381675] [2021-05-03 14:04:37,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:37,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:37,711 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:37,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562381675] [2021-05-03 14:04:37,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780792854] [2021-05-03 14:04:37,712 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 [2021-05-03 14:04:37,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:37,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:37,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-05-03 14:04:37,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:37,832 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:37,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:37,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-05-03 14:04:37,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635083636] [2021-05-03 14:04:37,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:04:37,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:37,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:04:37,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:37,833 INFO L87 Difference]: Start difference. First operand 234 states and 666 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) [2021-05-03 14:04:37,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:37,914 INFO L93 Difference]: Finished difference Result 439 states and 1228 transitions. [2021-05-03 14:04:37,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:04:37,914 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 17 [2021-05-03 14:04:37,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:37,916 INFO L225 Difference]: With dead ends: 439 [2021-05-03 14:04:37,917 INFO L226 Difference]: Without dead ends: 439 [2021-05-03 14:04:37,917 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 116.0ms TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:04:37,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-05-03 14:04:37,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 282. [2021-05-03 14:04:37,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 282 states, 281 states have (on average 2.8362989323843415) internal successors, (797), 281 states have internal predecessors, (797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:37,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 797 transitions. [2021-05-03 14:04:37,923 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 797 transitions. Word has length 17 [2021-05-03 14:04:37,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:37,923 INFO L480 AbstractCegarLoop]: Abstraction has 282 states and 797 transitions. [2021-05-03 14:04:37,923 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) [2021-05-03 14:04:37,924 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 797 transitions. [2021-05-03 14:04:37,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-03 14:04:37,924 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:37,924 INFO L551 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:38,140 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-05-03 14:04:38,141 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:38,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:38,141 INFO L82 PathProgramCache]: Analyzing trace with hash -437647465, now seen corresponding path program 51 times [2021-05-03 14:04:38,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:38,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808557462] [2021-05-03 14:04:38,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:38,231 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:38,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808557462] [2021-05-03 14:04:38,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253550672] [2021-05-03 14:04:38,231 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 [2021-05-03 14:04:38,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:04:38,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:38,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 17 conjunts are in the unsatisfiable core [2021-05-03 14:04:38,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:38,335 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:04:38,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:38,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-05-03 14:04:38,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062152916] [2021-05-03 14:04:38,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:04:38,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:38,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:04:38,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:04:38,336 INFO L87 Difference]: Start difference. First operand 282 states and 797 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-05-03 14:04:38,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:38,436 INFO L93 Difference]: Finished difference Result 508 states and 1418 transitions. [2021-05-03 14:04:38,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:04:38,437 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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 18 [2021-05-03 14:04:38,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:38,438 INFO L225 Difference]: With dead ends: 508 [2021-05-03 14:04:38,438 INFO L226 Difference]: Without dead ends: 507 [2021-05-03 14:04:38,438 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 144.6ms TimeCoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:04:38,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2021-05-03 14:04:38,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 340. [2021-05-03 14:04:38,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.8348082595870205) internal successors, (961), 339 states have internal predecessors, (961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:38,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 961 transitions. [2021-05-03 14:04:38,444 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 961 transitions. Word has length 18 [2021-05-03 14:04:38,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:38,444 INFO L480 AbstractCegarLoop]: Abstraction has 340 states and 961 transitions. [2021-05-03 14:04:38,444 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-05-03 14:04:38,445 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 961 transitions. [2021-05-03 14:04:38,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:04:38,445 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:38,445 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:38,652 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-05-03 14:04:38,653 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:38,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:38,653 INFO L82 PathProgramCache]: Analyzing trace with hash 169604407, now seen corresponding path program 52 times [2021-05-03 14:04:38,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:38,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465684797] [2021-05-03 14:04:38,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:38,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:38,715 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:38,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465684797] [2021-05-03 14:04:38,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951669361] [2021-05-03 14:04:38,715 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 [2021-05-03 14:04:38,753 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:38,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:38,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:04:38,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:39,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:39,024 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 [2021-05-03 14:04:39,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:39,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:39,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:39,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:04:39,792 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:39,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:39,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-05-03 14:04:39,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903175163] [2021-05-03 14:04:39,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:04:39,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:39,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:04:39,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:04:39,793 INFO L87 Difference]: Start difference. First operand 340 states and 961 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 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) [2021-05-03 14:04:39,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:39,985 INFO L93 Difference]: Finished difference Result 489 states and 1247 transitions. [2021-05-03 14:04:39,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:04:39,986 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 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 19 [2021-05-03 14:04:39,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:39,987 INFO L225 Difference]: With dead ends: 489 [2021-05-03 14:04:39,988 INFO L226 Difference]: Without dead ends: 486 [2021-05-03 14:04:39,988 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 187.0ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:04:39,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-05-03 14:04:39,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 387. [2021-05-03 14:04:39,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 387 states, 386 states have (on average 2.8626943005181347) internal successors, (1105), 386 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) [2021-05-03 14:04:39,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 1105 transitions. [2021-05-03 14:04:39,994 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 1105 transitions. Word has length 19 [2021-05-03 14:04:39,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:39,994 INFO L480 AbstractCegarLoop]: Abstraction has 387 states and 1105 transitions. [2021-05-03 14:04:39,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 20 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) [2021-05-03 14:04:39,994 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 1105 transitions. [2021-05-03 14:04:39,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:04:39,995 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:39,995 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:40,209 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-05-03 14:04:40,209 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:40,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:40,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1764941355, now seen corresponding path program 53 times [2021-05-03 14:04:40,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:40,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305706540] [2021-05-03 14:04:40,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:40,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:40,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305706540] [2021-05-03 14:04:40,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878710204] [2021-05-03 14:04:40,289 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 [2021-05-03 14:04:40,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:04:40,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:40,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:04:40,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:40,643 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:04:40,643 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:40,644 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 [2021-05-03 14:04:41,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:41,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:41,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:41,982 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:04:41,989 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:41,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:41,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-05-03 14:04:41,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207745411] [2021-05-03 14:04:41,990 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:04:41,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:41,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:04:41,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:04:41,990 INFO L87 Difference]: Start difference. First operand 387 states and 1105 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-05-03 14:04:42,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:42,203 INFO L93 Difference]: Finished difference Result 556 states and 1456 transitions. [2021-05-03 14:04:42,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:04:42,204 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 [2021-05-03 14:04:42,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:42,206 INFO L225 Difference]: With dead ends: 556 [2021-05-03 14:04:42,206 INFO L226 Difference]: Without dead ends: 553 [2021-05-03 14:04:42,206 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 197.2ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:04:42,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-05-03 14:04:42,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 432. [2021-05-03 14:04:42,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 431 states have (on average 2.9419953596287702) internal successors, (1268), 431 states have internal predecessors, (1268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:42,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 1268 transitions. [2021-05-03 14:04:42,215 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 1268 transitions. Word has length 19 [2021-05-03 14:04:42,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:42,215 INFO L480 AbstractCegarLoop]: Abstraction has 432 states and 1268 transitions. [2021-05-03 14:04:42,215 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-05-03 14:04:42,215 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 1268 transitions. [2021-05-03 14:04:42,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:04:42,216 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:42,216 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:42,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2021-05-03 14:04:42,439 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:42,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:42,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1606108669, now seen corresponding path program 54 times [2021-05-03 14:04:42,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:42,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684904731] [2021-05-03 14:04:42,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:42,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:42,502 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:42,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684904731] [2021-05-03 14:04:42,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769584065] [2021-05-03 14:04:42,503 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) [2021-05-03 14:04:42,540 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:04:42,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:42,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:04:42,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:42,848 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:04:42,849 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:42,849 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 [2021-05-03 14:04:44,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:44,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:44,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:44,864 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:04:44,871 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:44,872 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:44,872 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-05-03 14:04:44,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422075334] [2021-05-03 14:04:44,872 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:04:44,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:44,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:04:44,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:04:44,873 INFO L87 Difference]: Start difference. First operand 432 states and 1268 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-05-03 14:04:45,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:45,049 INFO L93 Difference]: Finished difference Result 627 states and 1702 transitions. [2021-05-03 14:04:45,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:04:45,049 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 [2021-05-03 14:04:45,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:45,052 INFO L225 Difference]: With dead ends: 627 [2021-05-03 14:04:45,052 INFO L226 Difference]: Without dead ends: 624 [2021-05-03 14:04:45,052 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 192.7ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:04:45,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-05-03 14:04:45,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 493. [2021-05-03 14:04:45,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 3.042682926829268) internal successors, (1497), 492 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:45,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1497 transitions. [2021-05-03 14:04:45,063 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1497 transitions. Word has length 19 [2021-05-03 14:04:45,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:45,063 INFO L480 AbstractCegarLoop]: Abstraction has 493 states and 1497 transitions. [2021-05-03 14:04:45,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-05-03 14:04:45,063 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1497 transitions. [2021-05-03 14:04:45,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:04:45,065 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:45,065 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:45,276 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable653 [2021-05-03 14:04:45,277 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:45,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:45,277 INFO L82 PathProgramCache]: Analyzing trace with hash -977262699, now seen corresponding path program 55 times [2021-05-03 14:04:45,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:45,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519809392] [2021-05-03 14:04:45,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:45,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:45,335 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:45,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519809392] [2021-05-03 14:04:45,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94024997] [2021-05-03 14:04:45,336 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) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:45,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:45,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:04:45,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:45,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:45,620 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 [2021-05-03 14:04:46,406 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:46,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:46,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:46,408 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:04:46,415 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:46,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:46,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-05-03 14:04:46,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012851833] [2021-05-03 14:04:46,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:04:46,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:46,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:04:46,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:04:46,416 INFO L87 Difference]: Start difference. First operand 493 states and 1497 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-05-03 14:04:46,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:46,645 INFO L93 Difference]: Finished difference Result 708 states and 2005 transitions. [2021-05-03 14:04:46,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:04:46,645 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 [2021-05-03 14:04:46,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:46,648 INFO L225 Difference]: With dead ends: 708 [2021-05-03 14:04:46,648 INFO L226 Difference]: Without dead ends: 705 [2021-05-03 14:04:46,649 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 176.1ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:04:46,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-05-03 14:04:46,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 574. [2021-05-03 14:04:46,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 574 states, 573 states have (on average 3.1448516579406633) internal successors, (1802), 573 states have internal predecessors, (1802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:46,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 574 states to 574 states and 1802 transitions. [2021-05-03 14:04:46,660 INFO L78 Accepts]: Start accepts. Automaton has 574 states and 1802 transitions. Word has length 19 [2021-05-03 14:04:46,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:46,660 INFO L480 AbstractCegarLoop]: Abstraction has 574 states and 1802 transitions. [2021-05-03 14:04:46,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-05-03 14:04:46,660 INFO L276 IsEmpty]: Start isEmpty. Operand 574 states and 1802 transitions. [2021-05-03 14:04:46,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:04:46,661 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:46,661 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:46,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1204 [2021-05-03 14:04:46,883 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:46,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:46,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1337093187, now seen corresponding path program 56 times [2021-05-03 14:04:46,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:46,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942962413] [2021-05-03 14:04:46,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:46,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:04:46,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942962413] [2021-05-03 14:04:46,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622547917] [2021-05-03 14:04:46,934 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) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:46,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:46,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:46,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:04:46,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:47,232 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:04:47,233 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:47,233 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 [2021-05-03 14:04:47,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:47,926 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:47,926 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:47,926 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:04:47,934 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:47,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:47,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-05-03 14:04:47,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116700120] [2021-05-03 14:04:47,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:04:47,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:47,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:04:47,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:04:47,935 INFO L87 Difference]: Start difference. First operand 574 states and 1802 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-05-03 14:04:48,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:48,110 INFO L93 Difference]: Finished difference Result 810 states and 2379 transitions. [2021-05-03 14:04:48,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:04:48,110 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 [2021-05-03 14:04:48,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:48,113 INFO L225 Difference]: With dead ends: 810 [2021-05-03 14:04:48,113 INFO L226 Difference]: Without dead ends: 807 [2021-05-03 14:04:48,113 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 160.3ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:04:48,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-05-03 14:04:48,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 673. [2021-05-03 14:04:48,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 673 states, 672 states have (on average 3.232142857142857) internal successors, (2172), 672 states have internal predecessors, (2172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:48,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 673 states to 673 states and 2172 transitions. [2021-05-03 14:04:48,128 INFO L78 Accepts]: Start accepts. Automaton has 673 states and 2172 transitions. Word has length 19 [2021-05-03 14:04:48,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:48,129 INFO L480 AbstractCegarLoop]: Abstraction has 673 states and 2172 transitions. [2021-05-03 14:04:48,129 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-05-03 14:04:48,129 INFO L276 IsEmpty]: Start isEmpty. Operand 673 states and 2172 transitions. [2021-05-03 14:04:48,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:04:48,130 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:48,130 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:48,344 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1468,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:48,345 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:48,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:48,345 INFO L82 PathProgramCache]: Analyzing trace with hash 67681621, now seen corresponding path program 57 times [2021-05-03 14:04:48,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:48,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960344616] [2021-05-03 14:04:48,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:48,417 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:48,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960344616] [2021-05-03 14:04:48,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284614055] [2021-05-03 14:04:48,418 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 [2021-05-03 14:04:48,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:04:48,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:48,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:04:48,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:48,703 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:48,703 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 [2021-05-03 14:04:49,636 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:49,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:49,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:49,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:04:49,645 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:49,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:49,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-05-03 14:04:49,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134910781] [2021-05-03 14:04:49,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:04:49,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:49,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:04:49,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:04:49,646 INFO L87 Difference]: Start difference. First operand 673 states and 2172 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-05-03 14:04:49,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:49,856 INFO L93 Difference]: Finished difference Result 900 states and 2698 transitions. [2021-05-03 14:04:49,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:04:49,857 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 [2021-05-03 14:04:49,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:49,861 INFO L225 Difference]: With dead ends: 900 [2021-05-03 14:04:49,861 INFO L226 Difference]: Without dead ends: 897 [2021-05-03 14:04:49,861 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 195.6ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:04:49,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 897 states. [2021-05-03 14:04:49,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 897 to 767. [2021-05-03 14:04:49,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 767 states, 766 states have (on average 3.27023498694517) internal successors, (2505), 766 states have internal predecessors, (2505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:49,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 2505 transitions. [2021-05-03 14:04:49,874 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 2505 transitions. Word has length 19 [2021-05-03 14:04:49,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:49,874 INFO L480 AbstractCegarLoop]: Abstraction has 767 states and 2505 transitions. [2021-05-03 14:04:49,874 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-05-03 14:04:49,874 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 2505 transitions. [2021-05-03 14:04:49,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:04:49,876 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:49,876 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:50,096 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1682 [2021-05-03 14:04:50,097 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:50,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:50,097 INFO L82 PathProgramCache]: Analyzing trace with hash -629371261, now seen corresponding path program 58 times [2021-05-03 14:04:50,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:50,097 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820839194] [2021-05-03 14:04:50,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:50,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:50,154 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:50,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820839194] [2021-05-03 14:04:50,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224640637] [2021-05-03 14:04:50,155 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 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 [2021-05-03 14:04:50,172 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:50,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:50,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:04:50,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:50,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:50,425 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 [2021-05-03 14:04:51,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:51,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:51,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:51,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:04:51,533 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:51,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:51,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-05-03 14:04:51,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964409359] [2021-05-03 14:04:51,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:04:51,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:51,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:04:51,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:04:51,534 INFO L87 Difference]: Start difference. First operand 767 states and 2505 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-05-03 14:04:51,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:51,727 INFO L93 Difference]: Finished difference Result 993 states and 3021 transitions. [2021-05-03 14:04:51,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:04:51,727 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 [2021-05-03 14:04:51,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:51,731 INFO L225 Difference]: With dead ends: 993 [2021-05-03 14:04:51,731 INFO L226 Difference]: Without dead ends: 990 [2021-05-03 14:04:51,731 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 167.7ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:04:51,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 990 states. [2021-05-03 14:04:51,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 990 to 859. [2021-05-03 14:04:51,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 858 states have (on average 3.297202797202797) internal successors, (2829), 858 states have internal predecessors, (2829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:51,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 2829 transitions. [2021-05-03 14:04:51,747 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 2829 transitions. Word has length 19 [2021-05-03 14:04:51,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:51,747 INFO L480 AbstractCegarLoop]: Abstraction has 859 states and 2829 transitions. [2021-05-03 14:04:51,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-05-03 14:04:51,747 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 2829 transitions. [2021-05-03 14:04:51,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:04:51,749 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:51,749 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:51,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1990 [2021-05-03 14:04:51,961 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:51,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:51,961 INFO L82 PathProgramCache]: Analyzing trace with hash -763174123, now seen corresponding path program 59 times [2021-05-03 14:04:51,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:51,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193322289] [2021-05-03 14:04:51,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:51,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:52,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193322289] [2021-05-03 14:04:52,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954250035] [2021-05-03 14:04:52,039 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 [2021-05-03 14:04:52,064 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:04:52,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:52,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:04:52,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:52,342 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2021-05-03 14:04:52,342 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:52,343 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 [2021-05-03 14:04:52,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:52,923 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:52,924 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:52,924 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:04:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:52,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:52,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-05-03 14:04:52,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308387037] [2021-05-03 14:04:52,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:04:52,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:52,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:04:52,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:04:52,931 INFO L87 Difference]: Start difference. First operand 859 states and 2829 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-05-03 14:04:53,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:53,140 INFO L93 Difference]: Finished difference Result 1089 states and 3338 transitions. [2021-05-03 14:04:53,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:04:53,140 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 [2021-05-03 14:04:53,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:53,144 INFO L225 Difference]: With dead ends: 1089 [2021-05-03 14:04:53,144 INFO L226 Difference]: Without dead ends: 1086 [2021-05-03 14:04:53,144 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 208.0ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:04:53,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-05-03 14:04:53,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 952. [2021-05-03 14:04:53,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 951 states have (on average 3.3070452155625656) internal successors, (3145), 951 states have internal predecessors, (3145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:53,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 3145 transitions. [2021-05-03 14:04:53,158 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 3145 transitions. Word has length 19 [2021-05-03 14:04:53,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:53,158 INFO L480 AbstractCegarLoop]: Abstraction has 952 states and 3145 transitions. [2021-05-03 14:04:53,158 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-05-03 14:04:53,159 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 3145 transitions. [2021-05-03 14:04:53,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-03 14:04:53,161 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:53,161 INFO L551 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:53,376 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2396,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:53,377 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:53,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:53,377 INFO L82 PathProgramCache]: Analyzing trace with hash -616095549, now seen corresponding path program 60 times [2021-05-03 14:04:53,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:53,377 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258868405] [2021-05-03 14:04:53,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:53,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:53,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258868405] [2021-05-03 14:04:53,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639065967] [2021-05-03 14:04:53,435 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 [2021-05-03 14:04:53,454 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:04:53,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:53,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 27 conjunts are in the unsatisfiable core [2021-05-03 14:04:53,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:53,719 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:53,719 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 [2021-05-03 14:04:55,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:04:55,330 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:04:55,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:04:55,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:39, output treesize:3 [2021-05-03 14:04:55,336 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:55,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:55,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-05-03 14:04:55,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388802219] [2021-05-03 14:04:55,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-03 14:04:55,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:55,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-03 14:04:55,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:04:55,337 INFO L87 Difference]: Start difference. First operand 952 states and 3145 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-05-03 14:04:55,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:55,538 INFO L93 Difference]: Finished difference Result 1152 states and 3567 transitions. [2021-05-03 14:04:55,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:04:55,538 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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 [2021-05-03 14:04:55,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:55,543 INFO L225 Difference]: With dead ends: 1152 [2021-05-03 14:04:55,543 INFO L226 Difference]: Without dead ends: 1149 [2021-05-03 14:04:55,544 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 184.1ms TimeCoverageRelationStatistics Valid=49, Invalid=371, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:04:55,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2021-05-03 14:04:55,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1030. [2021-05-03 14:04:55,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1030 states, 1029 states have (on average 3.308066083576288) internal successors, (3404), 1029 states have internal predecessors, (3404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:55,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1030 states to 1030 states and 3404 transitions. [2021-05-03 14:04:55,558 INFO L78 Accepts]: Start accepts. Automaton has 1030 states and 3404 transitions. Word has length 19 [2021-05-03 14:04:55,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:55,558 INFO L480 AbstractCegarLoop]: Abstraction has 1030 states and 3404 transitions. [2021-05-03 14:04:55,558 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 20 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) [2021-05-03 14:04:55,558 INFO L276 IsEmpty]: Start isEmpty. Operand 1030 states and 3404 transitions. [2021-05-03 14:04:55,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:55,560 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:55,560 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:55,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2659,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:55,768 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:55,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:55,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1814543255, now seen corresponding path program 61 times [2021-05-03 14:04:55,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:55,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545781024] [2021-05-03 14:04:55,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:55,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:55,852 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 28 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:55,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545781024] [2021-05-03 14:04:55,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541780513] [2021-05-03 14:04:55,854 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) [2021-05-03 14:04:55,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:55,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:04:55,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:55,943 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 36 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:55,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:55,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:04:55,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608208434] [2021-05-03 14:04:55,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:04:55,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:55,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:04:55,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:04:55,944 INFO L87 Difference]: Start difference. First operand 1030 states and 3404 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:04:56,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:56,145 INFO L93 Difference]: Finished difference Result 1163 states and 3561 transitions. [2021-05-03 14:04:56,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:04:56,146 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-05-03 14:04:56,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:56,149 INFO L225 Difference]: With dead ends: 1163 [2021-05-03 14:04:56,149 INFO L226 Difference]: Without dead ends: 1163 [2021-05-03 14:04:56,150 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 165.7ms TimeCoverageRelationStatistics Valid=221, Invalid=429, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:04:56,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1163 states. [2021-05-03 14:04:56,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1163 to 1002. [2021-05-03 14:04:56,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1002 states, 1001 states have (on average 3.2927072927072927) internal successors, (3296), 1001 states have internal predecessors, (3296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:56,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1002 states to 1002 states and 3296 transitions. [2021-05-03 14:04:56,168 INFO L78 Accepts]: Start accepts. Automaton has 1002 states and 3296 transitions. Word has length 20 [2021-05-03 14:04:56,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:56,169 INFO L480 AbstractCegarLoop]: Abstraction has 1002 states and 3296 transitions. [2021-05-03 14:04:56,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:04:56,169 INFO L276 IsEmpty]: Start isEmpty. Operand 1002 states and 3296 transitions. [2021-05-03 14:04:56,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:56,171 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:56,171 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:56,384 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3259,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:56,385 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:56,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:56,385 INFO L82 PathProgramCache]: Analyzing trace with hash 963496790, now seen corresponding path program 62 times [2021-05-03 14:04:56,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:56,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687854458] [2021-05-03 14:04:56,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:56,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:56,460 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:56,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687854458] [2021-05-03 14:04:56,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443223800] [2021-05-03 14:04:56,461 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 [2021-05-03 14:04:56,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:56,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:56,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:04:56,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:56,518 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:56,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:56,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:04:56,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007988386] [2021-05-03 14:04:56,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:04:56,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:56,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:04:56,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:04:56,519 INFO L87 Difference]: Start difference. First operand 1002 states and 3296 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:04:56,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:56,807 INFO L93 Difference]: Finished difference Result 1245 states and 3687 transitions. [2021-05-03 14:04:56,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:04:56,807 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-05-03 14:04:56,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:56,810 INFO L225 Difference]: With dead ends: 1245 [2021-05-03 14:04:56,810 INFO L226 Difference]: Without dead ends: 1238 [2021-05-03 14:04:56,810 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 238.8ms TimeCoverageRelationStatistics Valid=337, Invalid=655, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:04:56,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-05-03 14:04:56,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 1029. [2021-05-03 14:04:56,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 3.277237354085603) internal successors, (3369), 1028 states have internal predecessors, (3369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:56,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 3369 transitions. [2021-05-03 14:04:56,823 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 3369 transitions. Word has length 20 [2021-05-03 14:04:56,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:56,823 INFO L480 AbstractCegarLoop]: Abstraction has 1029 states and 3369 transitions. [2021-05-03 14:04:56,823 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:04:56,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 3369 transitions. [2021-05-03 14:04:56,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:56,825 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:56,826 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:57,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3260,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:57,031 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:57,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:57,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1620089803, now seen corresponding path program 63 times [2021-05-03 14:04:57,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:57,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367004158] [2021-05-03 14:04:57,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:57,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:57,102 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:57,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367004158] [2021-05-03 14:04:57,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1312109791] [2021-05-03 14:04:57,103 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 [2021-05-03 14:04:57,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:04:57,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:57,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:04:57,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:57,165 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 37 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:57,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:57,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:04:57,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228860293] [2021-05-03 14:04:57,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:57,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:57,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:57,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:57,166 INFO L87 Difference]: Start difference. First operand 1029 states and 3369 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) [2021-05-03 14:04:57,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:57,298 INFO L93 Difference]: Finished difference Result 1068 states and 3424 transitions. [2021-05-03 14:04:57,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:04:57,299 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 [2021-05-03 14:04:57,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:57,301 INFO L225 Difference]: With dead ends: 1068 [2021-05-03 14:04:57,301 INFO L226 Difference]: Without dead ends: 1067 [2021-05-03 14:04:57,301 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 115.7ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:04:57,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-05-03 14:04:57,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 1029. [2021-05-03 14:04:57,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1029 states, 1028 states have (on average 3.2733463035019454) internal successors, (3365), 1028 states have internal predecessors, (3365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:57,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1029 states to 1029 states and 3365 transitions. [2021-05-03 14:04:57,313 INFO L78 Accepts]: Start accepts. Automaton has 1029 states and 3365 transitions. Word has length 20 [2021-05-03 14:04:57,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:57,313 INFO L480 AbstractCegarLoop]: Abstraction has 1029 states and 3365 transitions. [2021-05-03 14:04:57,313 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) [2021-05-03 14:04:57,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1029 states and 3365 transitions. [2021-05-03 14:04:57,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:57,315 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:57,315 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:57,528 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3261 [2021-05-03 14:04:57,529 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:57,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:57,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1752458760, now seen corresponding path program 64 times [2021-05-03 14:04:57,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:57,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351134575] [2021-05-03 14:04:57,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:57,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:57,598 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:57,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351134575] [2021-05-03 14:04:57,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384850566] [2021-05-03 14:04:57,598 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) [2021-05-03 14:04:57,622 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:04:57,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:57,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:04:57,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:57,665 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:57,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:57,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:04:57,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267232630] [2021-05-03 14:04:57,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:57,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:57,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:57,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:57,666 INFO L87 Difference]: Start difference. First operand 1029 states and 3365 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) [2021-05-03 14:04:57,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:57,732 INFO L93 Difference]: Finished difference Result 1274 states and 3760 transitions. [2021-05-03 14:04:57,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:04:57,732 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 [2021-05-03 14:04:57,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:57,735 INFO L225 Difference]: With dead ends: 1274 [2021-05-03 14:04:57,735 INFO L226 Difference]: Without dead ends: 1274 [2021-05-03 14:04:57,735 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 68.1ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:57,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-05-03 14:04:57,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 995. [2021-05-03 14:04:57,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 995 states, 994 states have (on average 3.2575452716297786) internal successors, (3238), 994 states have internal predecessors, (3238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:57,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 995 states to 995 states and 3238 transitions. [2021-05-03 14:04:57,754 INFO L78 Accepts]: Start accepts. Automaton has 995 states and 3238 transitions. Word has length 20 [2021-05-03 14:04:57,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:57,754 INFO L480 AbstractCegarLoop]: Abstraction has 995 states and 3238 transitions. [2021-05-03 14:04:57,754 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) [2021-05-03 14:04:57,754 INFO L276 IsEmpty]: Start isEmpty. Operand 995 states and 3238 transitions. [2021-05-03 14:04:57,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:57,756 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:57,756 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:57,977 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3262 [2021-05-03 14:04:57,978 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:57,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:57,978 INFO L82 PathProgramCache]: Analyzing trace with hash 38830179, now seen corresponding path program 65 times [2021-05-03 14:04:57,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:57,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003180148] [2021-05-03 14:04:57,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:57,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:58,041 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:58,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003180148] [2021-05-03 14:04:58,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910722697] [2021-05-03 14:04:58,042 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 [2021-05-03 14:04:58,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:04:58,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:58,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:04:58,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:58,099 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:58,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:58,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:04:58,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744882746] [2021-05-03 14:04:58,099 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:58,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:58,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:58,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:58,100 INFO L87 Difference]: Start difference. First operand 995 states and 3238 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) [2021-05-03 14:04:58,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:58,198 INFO L93 Difference]: Finished difference Result 1213 states and 3571 transitions. [2021-05-03 14:04:58,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:04:58,198 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 [2021-05-03 14:04:58,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:58,200 INFO L225 Difference]: With dead ends: 1213 [2021-05-03 14:04:58,200 INFO L226 Difference]: Without dead ends: 1213 [2021-05-03 14:04:58,200 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:04:58,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2021-05-03 14:04:58,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1013. [2021-05-03 14:04:58,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1013 states, 1012 states have (on average 3.2371541501976284) internal successors, (3276), 1012 states have internal predecessors, (3276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:58,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1013 states to 1013 states and 3276 transitions. [2021-05-03 14:04:58,214 INFO L78 Accepts]: Start accepts. Automaton has 1013 states and 3276 transitions. Word has length 20 [2021-05-03 14:04:58,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:58,214 INFO L480 AbstractCegarLoop]: Abstraction has 1013 states and 3276 transitions. [2021-05-03 14:04:58,214 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) [2021-05-03 14:04:58,214 INFO L276 IsEmpty]: Start isEmpty. Operand 1013 states and 3276 transitions. [2021-05-03 14:04:58,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:58,215 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:58,215 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:58,416 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3263 [2021-05-03 14:04:58,416 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:58,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:58,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1122120312, now seen corresponding path program 66 times [2021-05-03 14:04:58,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:58,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002732466] [2021-05-03 14:04:58,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:58,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:58,480 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:58,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002732466] [2021-05-03 14:04:58,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791846447] [2021-05-03 14:04:58,480 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 [2021-05-03 14:04:58,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:04:58,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:58,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:04:58,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:58,533 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:04:58,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:58,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:04:58,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694490996] [2021-05-03 14:04:58,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:58,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:58,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:58,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:58,534 INFO L87 Difference]: Start difference. First operand 1013 states and 3276 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) [2021-05-03 14:04:58,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:58,672 INFO L93 Difference]: Finished difference Result 1229 states and 3602 transitions. [2021-05-03 14:04:58,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:04:58,672 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 [2021-05-03 14:04:58,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:58,674 INFO L225 Difference]: With dead ends: 1229 [2021-05-03 14:04:58,674 INFO L226 Difference]: Without dead ends: 1227 [2021-05-03 14:04:58,675 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 110.9ms TimeCoverageRelationStatistics Valid=175, Invalid=287, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:04:58,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1227 states. [2021-05-03 14:04:58,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1227 to 1023. [2021-05-03 14:04:58,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1023 states, 1022 states have (on average 3.238747553816047) internal successors, (3310), 1022 states have internal predecessors, (3310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:58,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1023 states to 1023 states and 3310 transitions. [2021-05-03 14:04:58,690 INFO L78 Accepts]: Start accepts. Automaton has 1023 states and 3310 transitions. Word has length 20 [2021-05-03 14:04:58,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:58,690 INFO L480 AbstractCegarLoop]: Abstraction has 1023 states and 3310 transitions. [2021-05-03 14:04:58,690 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) [2021-05-03 14:04:58,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1023 states and 3310 transitions. [2021-05-03 14:04:58,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:58,692 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:58,693 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:58,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3264 [2021-05-03 14:04:58,913 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:58,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:58,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1778922489, now seen corresponding path program 67 times [2021-05-03 14:04:58,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:58,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205553462] [2021-05-03 14:04:58,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:58,981 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 24 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:58,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205553462] [2021-05-03 14:04:58,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277178667] [2021-05-03 14:04:58,981 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) [2021-05-03 14:04:59,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:59,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:04:59,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:59,040 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 30 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:59,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:59,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:04:59,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736247115] [2021-05-03 14:04:59,041 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:59,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:59,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:59,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:59,042 INFO L87 Difference]: Start difference. First operand 1023 states and 3310 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) [2021-05-03 14:04:59,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:59,206 INFO L93 Difference]: Finished difference Result 1156 states and 3491 transitions. [2021-05-03 14:04:59,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:04:59,207 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 [2021-05-03 14:04:59,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:59,209 INFO L225 Difference]: With dead ends: 1156 [2021-05-03 14:04:59,209 INFO L226 Difference]: Without dead ends: 1154 [2021-05-03 14:04:59,209 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:04:59,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1154 states. [2021-05-03 14:04:59,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1154 to 998. [2021-05-03 14:04:59,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 998 states, 997 states have (on average 3.2367101303911734) internal successors, (3227), 997 states have internal predecessors, (3227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:59,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 3227 transitions. [2021-05-03 14:04:59,227 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 3227 transitions. Word has length 20 [2021-05-03 14:04:59,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:59,227 INFO L480 AbstractCegarLoop]: Abstraction has 998 states and 3227 transitions. [2021-05-03 14:04:59,228 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) [2021-05-03 14:04:59,228 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 3227 transitions. [2021-05-03 14:04:59,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:59,229 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:59,229 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:59,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3265 [2021-05-03 14:04:59,449 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:59,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:59,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1593626074, now seen corresponding path program 68 times [2021-05-03 14:04:59,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:59,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804257899] [2021-05-03 14:04:59,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:59,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:59,526 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:59,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804257899] [2021-05-03 14:04:59,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783675604] [2021-05-03 14:04:59,526 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) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:59,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:04:59,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:04:59,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:04:59,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:04:59,604 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:59,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:04:59,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:04:59,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967324568] [2021-05-03 14:04:59,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:04:59,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:04:59,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:04:59,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:04:59,605 INFO L87 Difference]: Start difference. First operand 998 states and 3227 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) [2021-05-03 14:04:59,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:04:59,673 INFO L93 Difference]: Finished difference Result 1269 states and 3667 transitions. [2021-05-03 14:04:59,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:04:59,673 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 [2021-05-03 14:04:59,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:04:59,676 INFO L225 Difference]: With dead ends: 1269 [2021-05-03 14:04:59,676 INFO L226 Difference]: Without dead ends: 1269 [2021-05-03 14:04:59,676 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 69.8ms TimeCoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:04:59,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-05-03 14:04:59,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1001. [2021-05-03 14:04:59,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 1000 states have (on average 3.236) internal successors, (3236), 1000 states have internal predecessors, (3236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:04:59,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 3236 transitions. [2021-05-03 14:04:59,697 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 3236 transitions. Word has length 20 [2021-05-03 14:04:59,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:04:59,697 INFO L480 AbstractCegarLoop]: Abstraction has 1001 states and 3236 transitions. [2021-05-03 14:04:59,697 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) [2021-05-03 14:04:59,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 3236 transitions. [2021-05-03 14:04:59,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:04:59,699 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:04:59,699 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:04:59,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3266,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:04:59,920 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:04:59,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:04:59,920 INFO L82 PathProgramCache]: Analyzing trace with hash -805431499, now seen corresponding path program 69 times [2021-05-03 14:04:59,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:04:59,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820034243] [2021-05-03 14:04:59,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:04:59,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:04:59,995 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:04:59,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820034243] [2021-05-03 14:04:59,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482543426] [2021-05-03 14:04:59,996 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 [2021-05-03 14:05:00,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:05:00,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:00,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:00,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:00,078 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 31 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:00,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:00,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:05:00,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918538877] [2021-05-03 14:05:00,079 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:00,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:00,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:00,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:00,080 INFO L87 Difference]: Start difference. First operand 1001 states and 3236 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) [2021-05-03 14:05:00,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:00,255 INFO L93 Difference]: Finished difference Result 1102 states and 3382 transitions. [2021-05-03 14:05:00,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:05:00,255 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 [2021-05-03 14:05:00,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:00,257 INFO L225 Difference]: With dead ends: 1102 [2021-05-03 14:05:00,257 INFO L226 Difference]: Without dead ends: 1100 [2021-05-03 14:05:00,257 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 136.5ms TimeCoverageRelationStatistics Valid=194, Invalid=358, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:05:00,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1100 states. [2021-05-03 14:05:00,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1100 to 1001. [2021-05-03 14:05:00,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 1000 states have (on average 3.232) internal successors, (3232), 1000 states have internal predecessors, (3232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:00,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 3232 transitions. [2021-05-03 14:05:00,269 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 3232 transitions. Word has length 20 [2021-05-03 14:05:00,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:00,269 INFO L480 AbstractCegarLoop]: Abstraction has 1001 states and 3232 transitions. [2021-05-03 14:05:00,269 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) [2021-05-03 14:05:00,269 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 3232 transitions. [2021-05-03 14:05:00,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:00,270 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:00,270 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:00,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3267,71 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:00,471 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:00,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:00,471 INFO L82 PathProgramCache]: Analyzing trace with hash 972293888, now seen corresponding path program 70 times [2021-05-03 14:05:00,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:00,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613993973] [2021-05-03 14:05:00,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:00,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:00,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613993973] [2021-05-03 14:05:00,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836852237] [2021-05-03 14:05:00,534 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 [2021-05-03 14:05:00,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:00,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:00,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:00,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:00,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:00,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:05:00,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088095969] [2021-05-03 14:05:00,598 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:00,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:00,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:00,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:00,599 INFO L87 Difference]: Start difference. First operand 1001 states and 3232 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) [2021-05-03 14:05:00,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:00,673 INFO L93 Difference]: Finished difference Result 1353 states and 3864 transitions. [2021-05-03 14:05:00,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:05:00,673 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 [2021-05-03 14:05:00,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:00,676 INFO L225 Difference]: With dead ends: 1353 [2021-05-03 14:05:00,676 INFO L226 Difference]: Without dead ends: 1353 [2021-05-03 14:05:00,676 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 74.2ms TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:05:00,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1353 states. [2021-05-03 14:05:00,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1353 to 965. [2021-05-03 14:05:00,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 3.2147302904564317) internal successors, (3099), 964 states have internal predecessors, (3099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:00,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 3099 transitions. [2021-05-03 14:05:00,694 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 3099 transitions. Word has length 20 [2021-05-03 14:05:00,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:00,694 INFO L480 AbstractCegarLoop]: Abstraction has 965 states and 3099 transitions. [2021-05-03 14:05:00,694 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) [2021-05-03 14:05:00,694 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 3099 transitions. [2021-05-03 14:05:00,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:00,696 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:00,696 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:00,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3268,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:00,917 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:00,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:00,917 INFO L82 PathProgramCache]: Analyzing trace with hash 667676149, now seen corresponding path program 71 times [2021-05-03 14:05:00,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:00,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319784681] [2021-05-03 14:05:00,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:00,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:00,985 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 13 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:00,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319784681] [2021-05-03 14:05:00,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162112119] [2021-05-03 14:05:00,985 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 [2021-05-03 14:05:01,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:05:01,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:01,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:01,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:01,052 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:01,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:01,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:05:01,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026949995] [2021-05-03 14:05:01,052 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:05:01,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:01,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:05:01,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:05:01,053 INFO L87 Difference]: Start difference. First operand 965 states and 3099 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) [2021-05-03 14:05:01,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:01,146 INFO L93 Difference]: Finished difference Result 1173 states and 3407 transitions. [2021-05-03 14:05:01,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:05:01,147 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 [2021-05-03 14:05:01,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:01,149 INFO L225 Difference]: With dead ends: 1173 [2021-05-03 14:05:01,149 INFO L226 Difference]: Without dead ends: 1173 [2021-05-03 14:05:01,149 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 91.5ms TimeCoverageRelationStatistics Valid=134, Invalid=208, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:05:01,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1173 states. [2021-05-03 14:05:01,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1173 to 959. [2021-05-03 14:05:01,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 959 states, 958 states have (on average 3.1920668058455113) internal successors, (3058), 958 states have internal predecessors, (3058), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:01,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 3058 transitions. [2021-05-03 14:05:01,166 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 3058 transitions. Word has length 20 [2021-05-03 14:05:01,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:01,166 INFO L480 AbstractCegarLoop]: Abstraction has 959 states and 3058 transitions. [2021-05-03 14:05:01,166 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) [2021-05-03 14:05:01,166 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 3058 transitions. [2021-05-03 14:05:01,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:01,168 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:01,168 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:01,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3269,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:01,391 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:01,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:01,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1750966282, now seen corresponding path program 72 times [2021-05-03 14:05:01,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:01,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438848291] [2021-05-03 14:05:01,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:01,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:01,444 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:01,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438848291] [2021-05-03 14:05:01,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066404312] [2021-05-03 14:05:01,445 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) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:01,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:05:01,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:01,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:01,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:01,498 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:01,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:01,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:05:01,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172708700] [2021-05-03 14:05:01,499 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:05:01,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:01,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:05:01,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:05:01,499 INFO L87 Difference]: Start difference. First operand 959 states and 3058 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) [2021-05-03 14:05:01,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:01,643 INFO L93 Difference]: Finished difference Result 1173 states and 3381 transitions. [2021-05-03 14:05:01,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:05:01,643 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 [2021-05-03 14:05:01,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:01,646 INFO L225 Difference]: With dead ends: 1173 [2021-05-03 14:05:01,646 INFO L226 Difference]: Without dead ends: 1171 [2021-05-03 14:05:01,646 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 104.9ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:05:01,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1171 states. [2021-05-03 14:05:01,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1171 to 971. [2021-05-03 14:05:01,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 971 states, 970 states have (on average 3.193814432989691) internal successors, (3098), 970 states have internal predecessors, (3098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:01,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 971 states to 971 states and 3098 transitions. [2021-05-03 14:05:01,664 INFO L78 Accepts]: Start accepts. Automaton has 971 states and 3098 transitions. Word has length 20 [2021-05-03 14:05:01,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:01,664 INFO L480 AbstractCegarLoop]: Abstraction has 971 states and 3098 transitions. [2021-05-03 14:05:01,664 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) [2021-05-03 14:05:01,665 INFO L276 IsEmpty]: Start isEmpty. Operand 971 states and 3098 transitions. [2021-05-03 14:05:01,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:01,666 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:01,666 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:01,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3270,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:01,881 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:01,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:01,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1887198837, now seen corresponding path program 73 times [2021-05-03 14:05:01,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:01,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68171695] [2021-05-03 14:05:01,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:01,943 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:01,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68171695] [2021-05-03 14:05:01,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830294205] [2021-05-03 14:05:01,944 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) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:01,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:01,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:01,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:01,996 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:01,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:01,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:05:01,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478644081] [2021-05-03 14:05:01,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:05:01,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:01,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:05:01,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:05:01,997 INFO L87 Difference]: Start difference. First operand 971 states and 3098 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) [2021-05-03 14:05:02,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:02,132 INFO L93 Difference]: Finished difference Result 1115 states and 3298 transitions. [2021-05-03 14:05:02,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:05:02,133 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 [2021-05-03 14:05:02,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:02,135 INFO L225 Difference]: With dead ends: 1115 [2021-05-03 14:05:02,135 INFO L226 Difference]: Without dead ends: 1113 [2021-05-03 14:05:02,135 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:05:02,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-05-03 14:05:02,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 965. [2021-05-03 14:05:02,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 3.1898340248962658) internal successors, (3075), 964 states have internal predecessors, (3075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:02,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 3075 transitions. [2021-05-03 14:05:02,155 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 3075 transitions. Word has length 20 [2021-05-03 14:05:02,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:02,156 INFO L480 AbstractCegarLoop]: Abstraction has 965 states and 3075 transitions. [2021-05-03 14:05:02,156 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) [2021-05-03 14:05:02,156 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 3075 transitions. [2021-05-03 14:05:02,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:02,158 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:02,158 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:02,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3271 [2021-05-03 14:05:02,373 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:02,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:02,373 INFO L82 PathProgramCache]: Analyzing trace with hash -964780104, now seen corresponding path program 74 times [2021-05-03 14:05:02,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:02,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879187985] [2021-05-03 14:05:02,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:02,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:02,431 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:02,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879187985] [2021-05-03 14:05:02,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631256422] [2021-05-03 14:05:02,431 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) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:02,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:02,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:02,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:02,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:02,499 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:02,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:02,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:05:02,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450286599] [2021-05-03 14:05:02,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:05:02,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:02,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:05:02,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:05:02,500 INFO L87 Difference]: Start difference. First operand 965 states and 3075 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) [2021-05-03 14:05:02,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:02,559 INFO L93 Difference]: Finished difference Result 1233 states and 3507 transitions. [2021-05-03 14:05:02,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:05:02,559 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 [2021-05-03 14:05:02,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:02,561 INFO L225 Difference]: With dead ends: 1233 [2021-05-03 14:05:02,561 INFO L226 Difference]: Without dead ends: 1233 [2021-05-03 14:05:02,561 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:02,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2021-05-03 14:05:02,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 967. [2021-05-03 14:05:02,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 3.18944099378882) internal successors, (3081), 966 states have internal predecessors, (3081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:02,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 3081 transitions. [2021-05-03 14:05:02,580 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 3081 transitions. Word has length 20 [2021-05-03 14:05:02,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:02,580 INFO L480 AbstractCegarLoop]: Abstraction has 967 states and 3081 transitions. [2021-05-03 14:05:02,580 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) [2021-05-03 14:05:02,580 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 3081 transitions. [2021-05-03 14:05:02,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:02,583 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:02,583 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:02,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3272,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:02,801 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:02,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:02,801 INFO L82 PathProgramCache]: Analyzing trace with hash -176585529, now seen corresponding path program 75 times [2021-05-03 14:05:02,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:02,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497438988] [2021-05-03 14:05:02,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:02,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:02,868 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 20 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:02,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497438988] [2021-05-03 14:05:02,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674403245] [2021-05-03 14:05:02,869 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 [2021-05-03 14:05:02,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:05:02,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:02,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:02,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:02,944 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 25 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:02,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:02,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:05:02,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859067667] [2021-05-03 14:05:02,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:02,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:02,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:02,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:02,945 INFO L87 Difference]: Start difference. First operand 967 states and 3081 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) [2021-05-03 14:05:03,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:03,103 INFO L93 Difference]: Finished difference Result 1112 states and 3285 transitions. [2021-05-03 14:05:03,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:05:03,103 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 [2021-05-03 14:05:03,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:03,109 INFO L225 Difference]: With dead ends: 1112 [2021-05-03 14:05:03,109 INFO L226 Difference]: Without dead ends: 1110 [2021-05-03 14:05:03,110 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=195, Invalid=357, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:05:03,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1110 states. [2021-05-03 14:05:03,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1110 to 967. [2021-05-03 14:05:03,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 967 states, 966 states have (on average 3.1853002070393375) internal successors, (3077), 966 states have internal predecessors, (3077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:03,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 967 states to 967 states and 3077 transitions. [2021-05-03 14:05:03,125 INFO L78 Accepts]: Start accepts. Automaton has 967 states and 3077 transitions. Word has length 20 [2021-05-03 14:05:03,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:03,125 INFO L480 AbstractCegarLoop]: Abstraction has 967 states and 3077 transitions. [2021-05-03 14:05:03,126 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) [2021-05-03 14:05:03,126 INFO L276 IsEmpty]: Start isEmpty. Operand 967 states and 3077 transitions. [2021-05-03 14:05:03,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:03,127 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:03,127 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:03,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3273 [2021-05-03 14:05:03,349 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:03,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:03,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1601139858, now seen corresponding path program 76 times [2021-05-03 14:05:03,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:03,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011104033] [2021-05-03 14:05:03,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:03,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:03,429 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:03,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011104033] [2021-05-03 14:05:03,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081752864] [2021-05-03 14:05:03,430 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 [2021-05-03 14:05:03,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:03,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:03,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:03,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:03,512 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:03,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:03,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:05:03,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322889809] [2021-05-03 14:05:03,513 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:03,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:03,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:03,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:03,513 INFO L87 Difference]: Start difference. First operand 967 states and 3077 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) [2021-05-03 14:05:03,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:03,602 INFO L93 Difference]: Finished difference Result 1326 states and 3712 transitions. [2021-05-03 14:05:03,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:05:03,602 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 [2021-05-03 14:05:03,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:03,605 INFO L225 Difference]: With dead ends: 1326 [2021-05-03 14:05:03,605 INFO L226 Difference]: Without dead ends: 1326 [2021-05-03 14:05:03,605 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 97.5ms TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:05:03,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1326 states. [2021-05-03 14:05:03,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1326 to 938. [2021-05-03 14:05:03,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 937 states have (on average 3.1643543223052295) internal successors, (2965), 937 states have internal predecessors, (2965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:03,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 2965 transitions. [2021-05-03 14:05:03,623 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 2965 transitions. Word has length 20 [2021-05-03 14:05:03,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:03,623 INFO L480 AbstractCegarLoop]: Abstraction has 938 states and 2965 transitions. [2021-05-03 14:05:03,623 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) [2021-05-03 14:05:03,623 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 2965 transitions. [2021-05-03 14:05:03,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:03,625 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:03,625 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:03,846 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3274 [2021-05-03 14:05:03,847 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:03,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:03,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1312819467, now seen corresponding path program 77 times [2021-05-03 14:05:03,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:03,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692995890] [2021-05-03 14:05:03,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:03,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:03,916 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 22 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:03,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692995890] [2021-05-03 14:05:03,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [895415692] [2021-05-03 14:05:03,916 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 [2021-05-03 14:05:03,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:05:03,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:03,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:03,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:03,987 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:03,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:03,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:05:03,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668773180] [2021-05-03 14:05:03,987 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:03,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:03,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:03,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:03,988 INFO L87 Difference]: Start difference. First operand 938 states and 2965 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) [2021-05-03 14:05:04,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:04,153 INFO L93 Difference]: Finished difference Result 1106 states and 3370 transitions. [2021-05-03 14:05:04,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:05:04,153 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 [2021-05-03 14:05:04,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:04,155 INFO L225 Difference]: With dead ends: 1106 [2021-05-03 14:05:04,155 INFO L226 Difference]: Without dead ends: 1103 [2021-05-03 14:05:04,155 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 137.2ms TimeCoverageRelationStatistics Valid=188, Invalid=364, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:05:04,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1103 states. [2021-05-03 14:05:04,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1103 to 941. [2021-05-03 14:05:04,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 940 states have (on average 3.1638297872340426) internal successors, (2974), 940 states have internal predecessors, (2974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:04,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 2974 transitions. [2021-05-03 14:05:04,170 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 2974 transitions. Word has length 20 [2021-05-03 14:05:04,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:04,170 INFO L480 AbstractCegarLoop]: Abstraction has 941 states and 2974 transitions. [2021-05-03 14:05:04,170 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) [2021-05-03 14:05:04,170 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 2974 transitions. [2021-05-03 14:05:04,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:04,172 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:04,172 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:04,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3275 [2021-05-03 14:05:04,394 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:04,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:04,395 INFO L82 PathProgramCache]: Analyzing trace with hash -459719944, now seen corresponding path program 78 times [2021-05-03 14:05:04,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:04,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153339740] [2021-05-03 14:05:04,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:04,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:04,464 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:04,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153339740] [2021-05-03 14:05:04,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033363107] [2021-05-03 14:05:04,464 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 [2021-05-03 14:05:04,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:05:04,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:04,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:04,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:04,529 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:04,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:04,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:05:04,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744516597] [2021-05-03 14:05:04,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:04,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:04,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:04,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:04,530 INFO L87 Difference]: Start difference. First operand 941 states and 2974 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) [2021-05-03 14:05:04,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:04,635 INFO L93 Difference]: Finished difference Result 1725 states and 5166 transitions. [2021-05-03 14:05:04,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:05:04,636 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 [2021-05-03 14:05:04,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:04,638 INFO L225 Difference]: With dead ends: 1725 [2021-05-03 14:05:04,638 INFO L226 Difference]: Without dead ends: 1725 [2021-05-03 14:05:04,639 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 102.7ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:05:04,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1725 states. [2021-05-03 14:05:04,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1725 to 1284. [2021-05-03 14:05:04,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 1283 states have (on average 3.3265783320342948) internal successors, (4268), 1283 states have internal predecessors, (4268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:04,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 4268 transitions. [2021-05-03 14:05:04,658 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 4268 transitions. Word has length 20 [2021-05-03 14:05:04,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:04,658 INFO L480 AbstractCegarLoop]: Abstraction has 1284 states and 4268 transitions. [2021-05-03 14:05:04,658 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) [2021-05-03 14:05:04,659 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 4268 transitions. [2021-05-03 14:05:04,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:04,660 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:04,660 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:04,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3276 [2021-05-03 14:05:04,861 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:04,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:04,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1312935261, now seen corresponding path program 79 times [2021-05-03 14:05:04,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:04,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090588778] [2021-05-03 14:05:04,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:04,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:04,917 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 12 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:04,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090588778] [2021-05-03 14:05:04,918 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302763447] [2021-05-03 14:05:04,918 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 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 [2021-05-03 14:05:04,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:04,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:04,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:04,975 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 16 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:04,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:04,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:05:04,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463100590] [2021-05-03 14:05:04,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:05:04,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:04,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:05:04,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:05:04,977 INFO L87 Difference]: Start difference. First operand 1284 states and 4268 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) [2021-05-03 14:05:05,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:05,094 INFO L93 Difference]: Finished difference Result 1481 states and 4527 transitions. [2021-05-03 14:05:05,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:05:05,095 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 [2021-05-03 14:05:05,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:05,096 INFO L225 Difference]: With dead ends: 1481 [2021-05-03 14:05:05,096 INFO L226 Difference]: Without dead ends: 1481 [2021-05-03 14:05:05,097 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=123, Invalid=183, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:05,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1481 states. [2021-05-03 14:05:05,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1481 to 1264. [2021-05-03 14:05:05,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1264 states, 1263 states have (on average 3.28978622327791) internal successors, (4155), 1263 states have internal predecessors, (4155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:05,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1264 states to 1264 states and 4155 transitions. [2021-05-03 14:05:05,118 INFO L78 Accepts]: Start accepts. Automaton has 1264 states and 4155 transitions. Word has length 20 [2021-05-03 14:05:05,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:05,119 INFO L480 AbstractCegarLoop]: Abstraction has 1264 states and 4155 transitions. [2021-05-03 14:05:05,119 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) [2021-05-03 14:05:05,119 INFO L276 IsEmpty]: Start isEmpty. Operand 1264 states and 4155 transitions. [2021-05-03 14:05:05,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:05,121 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:05,121 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:05,336 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3277,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:05,337 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:05,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:05,337 INFO L82 PathProgramCache]: Analyzing trace with hash -229645128, now seen corresponding path program 80 times [2021-05-03 14:05:05,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:05,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727299817] [2021-05-03 14:05:05,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:05,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:05,390 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:05,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727299817] [2021-05-03 14:05:05,391 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38058582] [2021-05-03 14:05:05,391 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 [2021-05-03 14:05:05,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:05,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:05,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:05,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:05,441 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:05,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:05,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:05:05,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649511534] [2021-05-03 14:05:05,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:05:05,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:05,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:05:05,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:05:05,442 INFO L87 Difference]: Start difference. First operand 1264 states and 4155 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) [2021-05-03 14:05:05,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:05,577 INFO L93 Difference]: Finished difference Result 1495 states and 4548 transitions. [2021-05-03 14:05:05,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:05:05,578 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 [2021-05-03 14:05:05,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:05,580 INFO L225 Difference]: With dead ends: 1495 [2021-05-03 14:05:05,580 INFO L226 Difference]: Without dead ends: 1493 [2021-05-03 14:05:05,580 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 102.7ms TimeCoverageRelationStatistics Valid=173, Invalid=289, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:05:05,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2021-05-03 14:05:05,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 1297. [2021-05-03 14:05:05,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1297 states, 1296 states have (on average 3.2916666666666665) internal successors, (4266), 1296 states have internal predecessors, (4266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:05,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1297 states to 1297 states and 4266 transitions. [2021-05-03 14:05:05,601 INFO L78 Accepts]: Start accepts. Automaton has 1297 states and 4266 transitions. Word has length 20 [2021-05-03 14:05:05,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:05,601 INFO L480 AbstractCegarLoop]: Abstraction has 1297 states and 4266 transitions. [2021-05-03 14:05:05,601 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) [2021-05-03 14:05:05,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1297 states and 4266 transitions. [2021-05-03 14:05:05,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:05,603 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:05,603 INFO L551 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:05,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3278,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:05,825 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:05,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:05,826 INFO L82 PathProgramCache]: Analyzing trace with hash 427157049, now seen corresponding path program 81 times [2021-05-03 14:05:05,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:05,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058054506] [2021-05-03 14:05:05,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:05,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:05,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058054506] [2021-05-03 14:05:05,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32545088] [2021-05-03 14:05:05,879 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 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 [2021-05-03 14:05:05,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:05:05,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:05,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 21 conjunts are in the unsatisfiable core [2021-05-03 14:05:05,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:06,017 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 47 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:06,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:06,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-05-03 14:05:06,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123111373] [2021-05-03 14:05:06,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-03 14:05:06,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:06,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-03 14:05:06,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:05:06,018 INFO L87 Difference]: Start difference. First operand 1297 states and 4266 transitions. Second operand has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 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) [2021-05-03 14:05:06,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:06,894 INFO L93 Difference]: Finished difference Result 2116 states and 6354 transitions. [2021-05-03 14:05:06,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-03 14:05:06,895 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 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 20 [2021-05-03 14:05:06,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:06,897 INFO L225 Difference]: With dead ends: 2116 [2021-05-03 14:05:06,898 INFO L226 Difference]: Without dead ends: 2110 [2021-05-03 14:05:06,898 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 677.5ms TimeCoverageRelationStatistics Valid=690, Invalid=5316, Unknown=0, NotChecked=0, Total=6006 [2021-05-03 14:05:06,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2021-05-03 14:05:06,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 1671. [2021-05-03 14:05:06,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1671 states, 1670 states have (on average 3.2149700598802395) internal successors, (5369), 1670 states have internal predecessors, (5369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:06,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1671 states to 1671 states and 5369 transitions. [2021-05-03 14:05:06,921 INFO L78 Accepts]: Start accepts. Automaton has 1671 states and 5369 transitions. Word has length 20 [2021-05-03 14:05:06,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:06,921 INFO L480 AbstractCegarLoop]: Abstraction has 1671 states and 5369 transitions. [2021-05-03 14:05:06,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 1.5217391304347827) internal successors, (35), 22 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) [2021-05-03 14:05:06,921 INFO L276 IsEmpty]: Start isEmpty. Operand 1671 states and 5369 transitions. [2021-05-03 14:05:06,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:06,924 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:06,924 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:07,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3279,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:07,124 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:07,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:07,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1349575782, now seen corresponding path program 82 times [2021-05-03 14:05:07,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:07,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79171600] [2021-05-03 14:05:07,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:07,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:07,191 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:07,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79171600] [2021-05-03 14:05:07,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246749004] [2021-05-03 14:05:07,192 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) [2021-05-03 14:05:07,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:07,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:07,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:07,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:07,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:07,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:05:07,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313906368] [2021-05-03 14:05:07,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:05:07,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:07,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:05:07,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:05:07,285 INFO L87 Difference]: Start difference. First operand 1671 states and 5369 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) [2021-05-03 14:05:07,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:07,347 INFO L93 Difference]: Finished difference Result 1971 states and 5778 transitions. [2021-05-03 14:05:07,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:05:07,348 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 [2021-05-03 14:05:07,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:07,351 INFO L225 Difference]: With dead ends: 1971 [2021-05-03 14:05:07,351 INFO L226 Difference]: Without dead ends: 1971 [2021-05-03 14:05:07,351 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:07,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1971 states. [2021-05-03 14:05:07,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1971 to 1669. [2021-05-03 14:05:07,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1669 states, 1668 states have (on average 3.2044364508393284) internal successors, (5345), 1668 states have internal predecessors, (5345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:07,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1669 states to 1669 states and 5345 transitions. [2021-05-03 14:05:07,384 INFO L78 Accepts]: Start accepts. Automaton has 1669 states and 5345 transitions. Word has length 20 [2021-05-03 14:05:07,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:07,384 INFO L480 AbstractCegarLoop]: Abstraction has 1669 states and 5345 transitions. [2021-05-03 14:05:07,384 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) [2021-05-03 14:05:07,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1669 states and 5345 transitions. [2021-05-03 14:05:07,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:07,387 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:07,387 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:07,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3280,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:07,608 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:07,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:07,609 INFO L82 PathProgramCache]: Analyzing trace with hash -379471552, now seen corresponding path program 83 times [2021-05-03 14:05:07,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:07,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246719220] [2021-05-03 14:05:07,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:07,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:07,672 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:07,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246719220] [2021-05-03 14:05:07,674 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192525612] [2021-05-03 14:05:07,674 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) [2021-05-03 14:05:07,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:05:07,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:07,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:07,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:07,755 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:07,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:07,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:05:07,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597753442] [2021-05-03 14:05:07,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:07,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:07,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:07,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:07,757 INFO L87 Difference]: Start difference. First operand 1669 states and 5345 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) [2021-05-03 14:05:07,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:07,851 INFO L93 Difference]: Finished difference Result 2070 states and 5985 transitions. [2021-05-03 14:05:07,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:05:07,852 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 [2021-05-03 14:05:07,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:07,855 INFO L225 Difference]: With dead ends: 2070 [2021-05-03 14:05:07,855 INFO L226 Difference]: Without dead ends: 2070 [2021-05-03 14:05:07,855 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 76.9ms TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:05:07,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2021-05-03 14:05:07,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 1581. [2021-05-03 14:05:07,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1581 states, 1580 states have (on average 3.1848101265822786) internal successors, (5032), 1580 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:07,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1581 states to 1581 states and 5032 transitions. [2021-05-03 14:05:07,884 INFO L78 Accepts]: Start accepts. Automaton has 1581 states and 5032 transitions. Word has length 20 [2021-05-03 14:05:07,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:07,884 INFO L480 AbstractCegarLoop]: Abstraction has 1581 states and 5032 transitions. [2021-05-03 14:05:07,884 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) [2021-05-03 14:05:07,884 INFO L276 IsEmpty]: Start isEmpty. Operand 1581 states and 5032 transitions. [2021-05-03 14:05:07,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:07,886 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:07,886 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:08,090 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3281 [2021-05-03 14:05:08,091 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:08,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:08,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1854635942, now seen corresponding path program 84 times [2021-05-03 14:05:08,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:08,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774084465] [2021-05-03 14:05:08,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:08,146 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:08,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774084465] [2021-05-03 14:05:08,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713968369] [2021-05-03 14:05:08,147 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 [2021-05-03 14:05:08,169 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:05:08,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:08,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:08,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:08,212 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:08,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:08,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:05:08,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090541114] [2021-05-03 14:05:08,213 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:08,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:08,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:08,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:08,213 INFO L87 Difference]: Start difference. First operand 1581 states and 5032 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) [2021-05-03 14:05:08,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:08,301 INFO L93 Difference]: Finished difference Result 2650 states and 8050 transitions. [2021-05-03 14:05:08,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:05:08,302 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 [2021-05-03 14:05:08,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:08,305 INFO L225 Difference]: With dead ends: 2650 [2021-05-03 14:05:08,305 INFO L226 Difference]: Without dead ends: 2650 [2021-05-03 14:05:08,306 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:08,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2021-05-03 14:05:08,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 2152. [2021-05-03 14:05:08,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2152 states, 2151 states have (on average 3.3170618317061833) internal successors, (7135), 2151 states have internal predecessors, (7135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:08,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2152 states to 2152 states and 7135 transitions. [2021-05-03 14:05:08,334 INFO L78 Accepts]: Start accepts. Automaton has 2152 states and 7135 transitions. Word has length 20 [2021-05-03 14:05:08,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:08,334 INFO L480 AbstractCegarLoop]: Abstraction has 2152 states and 7135 transitions. [2021-05-03 14:05:08,334 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) [2021-05-03 14:05:08,334 INFO L276 IsEmpty]: Start isEmpty. Operand 2152 states and 7135 transitions. [2021-05-03 14:05:08,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:08,337 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:08,337 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:08,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3282,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:08,537 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:08,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:08,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1902475776, now seen corresponding path program 85 times [2021-05-03 14:05:08,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:08,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412696110] [2021-05-03 14:05:08,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:08,601 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:08,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412696110] [2021-05-03 14:05:08,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508553956] [2021-05-03 14:05:08,601 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 [2021-05-03 14:05:08,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:08,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:08,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:08,669 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:08,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:08,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:05:08,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699148022] [2021-05-03 14:05:08,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:08,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:08,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:08,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:08,670 INFO L87 Difference]: Start difference. First operand 2152 states and 7135 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) [2021-05-03 14:05:08,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:08,813 INFO L93 Difference]: Finished difference Result 3538 states and 11103 transitions. [2021-05-03 14:05:08,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:05:08,813 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 [2021-05-03 14:05:08,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:08,817 INFO L225 Difference]: With dead ends: 3538 [2021-05-03 14:05:08,817 INFO L226 Difference]: Without dead ends: 3538 [2021-05-03 14:05:08,817 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=198, Invalid=354, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:05:08,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3538 states. [2021-05-03 14:05:08,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3538 to 2878. [2021-05-03 14:05:08,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2878 states, 2877 states have (on average 3.397636426833507) internal successors, (9775), 2877 states have internal predecessors, (9775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:08,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2878 states to 2878 states and 9775 transitions. [2021-05-03 14:05:08,853 INFO L78 Accepts]: Start accepts. Automaton has 2878 states and 9775 transitions. Word has length 20 [2021-05-03 14:05:08,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:08,853 INFO L480 AbstractCegarLoop]: Abstraction has 2878 states and 9775 transitions. [2021-05-03 14:05:08,853 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) [2021-05-03 14:05:08,853 INFO L276 IsEmpty]: Start isEmpty. Operand 2878 states and 9775 transitions. [2021-05-03 14:05:08,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:08,856 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:08,856 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:09,056 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3283 [2021-05-03 14:05:09,057 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:09,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:09,057 INFO L82 PathProgramCache]: Analyzing trace with hash -1499056694, now seen corresponding path program 86 times [2021-05-03 14:05:09,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:09,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754780716] [2021-05-03 14:05:09,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:09,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:09,113 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:09,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754780716] [2021-05-03 14:05:09,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994448458] [2021-05-03 14:05:09,113 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 [2021-05-03 14:05:09,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:09,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:09,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:09,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:09,164 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:09,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:09,164 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:05:09,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725403216] [2021-05-03 14:05:09,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:05:09,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:09,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:05:09,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:05:09,165 INFO L87 Difference]: Start difference. First operand 2878 states and 9775 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) [2021-05-03 14:05:09,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:09,303 INFO L93 Difference]: Finished difference Result 3252 states and 10560 transitions. [2021-05-03 14:05:09,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:05:09,303 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 [2021-05-03 14:05:09,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:09,308 INFO L225 Difference]: With dead ends: 3252 [2021-05-03 14:05:09,309 INFO L226 Difference]: Without dead ends: 3250 [2021-05-03 14:05:09,309 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 104.1ms TimeCoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:05:09,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3250 states. [2021-05-03 14:05:09,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3250 to 3003. [2021-05-03 14:05:09,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3003 states, 3002 states have (on average 3.389407061958694) internal successors, (10175), 3002 states have internal predecessors, (10175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:09,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3003 states to 3003 states and 10175 transitions. [2021-05-03 14:05:09,352 INFO L78 Accepts]: Start accepts. Automaton has 3003 states and 10175 transitions. Word has length 20 [2021-05-03 14:05:09,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:09,353 INFO L480 AbstractCegarLoop]: Abstraction has 3003 states and 10175 transitions. [2021-05-03 14:05:09,353 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) [2021-05-03 14:05:09,353 INFO L276 IsEmpty]: Start isEmpty. Operand 3003 states and 10175 transitions. [2021-05-03 14:05:09,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:09,356 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:09,356 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:09,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3284 [2021-05-03 14:05:09,557 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:09,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:09,557 INFO L82 PathProgramCache]: Analyzing trace with hash 80164216, now seen corresponding path program 87 times [2021-05-03 14:05:09,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:09,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300153555] [2021-05-03 14:05:09,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:09,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:09,623 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:09,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300153555] [2021-05-03 14:05:09,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418140358] [2021-05-03 14:05:09,624 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 [2021-05-03 14:05:09,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:05:09,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:09,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:09,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:09,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:09,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:05:09,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880282814] [2021-05-03 14:05:09,681 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:05:09,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:09,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:05:09,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:05:09,682 INFO L87 Difference]: Start difference. First operand 3003 states and 10175 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) [2021-05-03 14:05:09,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:09,761 INFO L93 Difference]: Finished difference Result 3239 states and 10385 transitions. [2021-05-03 14:05:09,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:05:09,761 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 [2021-05-03 14:05:09,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:09,765 INFO L225 Difference]: With dead ends: 3239 [2021-05-03 14:05:09,765 INFO L226 Difference]: Without dead ends: 3239 [2021-05-03 14:05:09,765 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=76, Invalid=106, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:09,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3239 states. [2021-05-03 14:05:09,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3239 to 2935. [2021-05-03 14:05:09,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2935 states, 2934 states have (on average 3.3677573278800272) internal successors, (9881), 2934 states have internal predecessors, (9881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:09,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2935 states to 2935 states and 9881 transitions. [2021-05-03 14:05:09,808 INFO L78 Accepts]: Start accepts. Automaton has 2935 states and 9881 transitions. Word has length 20 [2021-05-03 14:05:09,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:09,808 INFO L480 AbstractCegarLoop]: Abstraction has 2935 states and 9881 transitions. [2021-05-03 14:05:09,808 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) [2021-05-03 14:05:09,808 INFO L276 IsEmpty]: Start isEmpty. Operand 2935 states and 9881 transitions. [2021-05-03 14:05:09,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:09,811 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:09,811 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:10,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3285,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:10,012 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:10,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:10,012 INFO L82 PathProgramCache]: Analyzing trace with hash -1648883118, now seen corresponding path program 88 times [2021-05-03 14:05:10,012 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:10,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496990402] [2021-05-03 14:05:10,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:10,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:10,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496990402] [2021-05-03 14:05:10,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241306089] [2021-05-03 14:05:10,099 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) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:10,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:10,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:10,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:10,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:10,166 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:10,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:10,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:05:10,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742824445] [2021-05-03 14:05:10,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:10,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:10,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:10,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:10,167 INFO L87 Difference]: Start difference. First operand 2935 states and 9881 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) [2021-05-03 14:05:10,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:10,258 INFO L93 Difference]: Finished difference Result 3341 states and 10608 transitions. [2021-05-03 14:05:10,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:05:10,258 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 [2021-05-03 14:05:10,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:10,263 INFO L225 Difference]: With dead ends: 3341 [2021-05-03 14:05:10,263 INFO L226 Difference]: Without dead ends: 3341 [2021-05-03 14:05:10,264 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 84.0ms TimeCoverageRelationStatistics Valid=106, Invalid=166, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:05:10,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3341 states. [2021-05-03 14:05:10,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3341 to 2802. [2021-05-03 14:05:10,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2802 states, 2801 states have (on average 3.3491610139235988) internal successors, (9381), 2801 states have internal predecessors, (9381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:10,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2802 states to 2802 states and 9381 transitions. [2021-05-03 14:05:10,305 INFO L78 Accepts]: Start accepts. Automaton has 2802 states and 9381 transitions. Word has length 20 [2021-05-03 14:05:10,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:10,305 INFO L480 AbstractCegarLoop]: Abstraction has 2802 states and 9381 transitions. [2021-05-03 14:05:10,305 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) [2021-05-03 14:05:10,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2802 states and 9381 transitions. [2021-05-03 14:05:10,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:10,309 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:10,309 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:10,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3286,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:10,509 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:10,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:10,510 INFO L82 PathProgramCache]: Analyzing trace with hash 585224376, now seen corresponding path program 89 times [2021-05-03 14:05:10,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:10,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317923264] [2021-05-03 14:05:10,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:10,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:10,577 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:10,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317923264] [2021-05-03 14:05:10,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798248165] [2021-05-03 14:05:10,578 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 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 [2021-05-03 14:05:10,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:05:10,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:10,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:10,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:10,637 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:10,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:10,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:05:10,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260773756] [2021-05-03 14:05:10,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:10,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:10,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:10,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:10,638 INFO L87 Difference]: Start difference. First operand 2802 states and 9381 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) [2021-05-03 14:05:10,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:10,729 INFO L93 Difference]: Finished difference Result 4613 states and 15295 transitions. [2021-05-03 14:05:10,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:05:10,730 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 [2021-05-03 14:05:10,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:10,736 INFO L225 Difference]: With dead ends: 4613 [2021-05-03 14:05:10,736 INFO L226 Difference]: Without dead ends: 4613 [2021-05-03 14:05:10,736 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:10,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4613 states. [2021-05-03 14:05:10,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4613 to 4212. [2021-05-03 14:05:10,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4212 states, 4211 states have (on average 3.4713844692472096) internal successors, (14618), 4211 states have internal predecessors, (14618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:10,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4212 states to 4212 states and 14618 transitions. [2021-05-03 14:05:10,791 INFO L78 Accepts]: Start accepts. Automaton has 4212 states and 14618 transitions. Word has length 20 [2021-05-03 14:05:10,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:10,791 INFO L480 AbstractCegarLoop]: Abstraction has 4212 states and 14618 transitions. [2021-05-03 14:05:10,791 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) [2021-05-03 14:05:10,791 INFO L276 IsEmpty]: Start isEmpty. Operand 4212 states and 14618 transitions. [2021-05-03 14:05:10,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:10,794 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:10,794 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:10,994 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3287 [2021-05-03 14:05:10,995 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:10,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:10,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1123079954, now seen corresponding path program 90 times [2021-05-03 14:05:10,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:10,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048597234] [2021-05-03 14:05:10,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:10,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:11,060 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:11,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048597234] [2021-05-03 14:05:11,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602541270] [2021-05-03 14:05:11,060 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) [2021-05-03 14:05:11,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:05:11,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:11,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:11,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:11,148 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:11,149 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:11,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:05:11,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753590140] [2021-05-03 14:05:11,149 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:11,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:11,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:11,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:11,149 INFO L87 Difference]: Start difference. First operand 4212 states and 14618 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) [2021-05-03 14:05:11,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:11,307 INFO L93 Difference]: Finished difference Result 5440 states and 18349 transitions. [2021-05-03 14:05:11,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:05:11,308 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 [2021-05-03 14:05:11,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:11,319 INFO L225 Difference]: With dead ends: 5440 [2021-05-03 14:05:11,319 INFO L226 Difference]: Without dead ends: 5440 [2021-05-03 14:05:11,319 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:05:11,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5440 states. [2021-05-03 14:05:11,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5440 to 5067. [2021-05-03 14:05:11,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5067 states, 5066 states have (on average 3.5063166206079748) internal successors, (17763), 5066 states have internal predecessors, (17763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:11,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5067 states to 5067 states and 17763 transitions. [2021-05-03 14:05:11,436 INFO L78 Accepts]: Start accepts. Automaton has 5067 states and 17763 transitions. Word has length 20 [2021-05-03 14:05:11,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:11,436 INFO L480 AbstractCegarLoop]: Abstraction has 5067 states and 17763 transitions. [2021-05-03 14:05:11,436 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) [2021-05-03 14:05:11,436 INFO L276 IsEmpty]: Start isEmpty. Operand 5067 states and 17763 transitions. [2021-05-03 14:05:11,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:11,441 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:11,441 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:11,656 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3288,92 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:11,657 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:11,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:11,657 INFO L82 PathProgramCache]: Analyzing trace with hash 616733688, now seen corresponding path program 91 times [2021-05-03 14:05:11,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:11,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027400999] [2021-05-03 14:05:11,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:11,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:11,719 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:11,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027400999] [2021-05-03 14:05:11,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044655385] [2021-05-03 14:05:11,720 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 [2021-05-03 14:05:11,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:11,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:11,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:11,784 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:11,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:11,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:05:11,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737493954] [2021-05-03 14:05:11,785 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:11,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:11,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:11,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:11,785 INFO L87 Difference]: Start difference. First operand 5067 states and 17763 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) [2021-05-03 14:05:11,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:11,979 INFO L93 Difference]: Finished difference Result 6110 states and 20625 transitions. [2021-05-03 14:05:11,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:05:11,980 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 [2021-05-03 14:05:11,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:11,989 INFO L225 Difference]: With dead ends: 6110 [2021-05-03 14:05:11,989 INFO L226 Difference]: Without dead ends: 6110 [2021-05-03 14:05:11,989 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 163.6ms TimeCoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:05:11,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6110 states. [2021-05-03 14:05:12,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6110 to 5618. [2021-05-03 14:05:12,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5618 states, 5617 states have (on average 3.5143314936799004) internal successors, (19740), 5617 states have internal predecessors, (19740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:12,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5618 states to 5618 states and 19740 transitions. [2021-05-03 14:05:12,084 INFO L78 Accepts]: Start accepts. Automaton has 5618 states and 19740 transitions. Word has length 20 [2021-05-03 14:05:12,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:12,084 INFO L480 AbstractCegarLoop]: Abstraction has 5618 states and 19740 transitions. [2021-05-03 14:05:12,084 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) [2021-05-03 14:05:12,084 INFO L276 IsEmpty]: Start isEmpty. Operand 5618 states and 19740 transitions. [2021-05-03 14:05:12,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:12,089 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:12,089 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:12,289 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3289,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:12,289 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:12,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:12,290 INFO L82 PathProgramCache]: Analyzing trace with hash -2093644800, now seen corresponding path program 92 times [2021-05-03 14:05:12,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:12,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178403126] [2021-05-03 14:05:12,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:12,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:05:12,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178403126] [2021-05-03 14:05:12,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874894003] [2021-05-03 14:05:12,394 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) [2021-05-03 14:05:12,423 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:12,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:12,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:12,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:12,459 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:05:12,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:12,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-05-03 14:05:12,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169348777] [2021-05-03 14:05:12,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-03 14:05:12,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:12,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-03 14:05:12,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-05-03 14:05:12,461 INFO L87 Difference]: Start difference. First operand 5618 states and 19740 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-05-03 14:05:12,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:12,645 INFO L93 Difference]: Finished difference Result 7038 states and 24489 transitions. [2021-05-03 14:05:12,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:05:12,645 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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 20 [2021-05-03 14:05:12,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:12,662 INFO L225 Difference]: With dead ends: 7038 [2021-05-03 14:05:12,662 INFO L226 Difference]: Without dead ends: 7034 [2021-05-03 14:05:12,662 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 116.1ms TimeCoverageRelationStatistics Valid=146, Invalid=274, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:05:12,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7034 states. [2021-05-03 14:05:12,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7034 to 6840. [2021-05-03 14:05:12,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6840 states, 6839 states have (on average 3.5451089340546864) internal successors, (24245), 6839 states have internal predecessors, (24245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:12,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6840 states to 6840 states and 24245 transitions. [2021-05-03 14:05:12,815 INFO L78 Accepts]: Start accepts. Automaton has 6840 states and 24245 transitions. Word has length 20 [2021-05-03 14:05:12,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:12,815 INFO L480 AbstractCegarLoop]: Abstraction has 6840 states and 24245 transitions. [2021-05-03 14:05:12,816 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 10 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) [2021-05-03 14:05:12,816 INFO L276 IsEmpty]: Start isEmpty. Operand 6840 states and 24245 transitions. [2021-05-03 14:05:12,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:12,822 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:12,822 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:13,041 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3290 [2021-05-03 14:05:13,041 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:13,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:13,042 INFO L82 PathProgramCache]: Analyzing trace with hash 178840000, now seen corresponding path program 93 times [2021-05-03 14:05:13,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:13,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747248701] [2021-05-03 14:05:13,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:13,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:13,098 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:13,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747248701] [2021-05-03 14:05:13,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15503330] [2021-05-03 14:05:13,099 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 [2021-05-03 14:05:13,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:05:13,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:13,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:13,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:05:13,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:13,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:05:13,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298969755] [2021-05-03 14:05:13,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:05:13,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:13,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:05:13,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:05:13,172 INFO L87 Difference]: Start difference. First operand 6840 states and 24245 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) [2021-05-03 14:05:13,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:13,278 INFO L93 Difference]: Finished difference Result 7707 states and 26447 transitions. [2021-05-03 14:05:13,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:05:13,278 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 20 [2021-05-03 14:05:13,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:13,292 INFO L225 Difference]: With dead ends: 7707 [2021-05-03 14:05:13,293 INFO L226 Difference]: Without dead ends: 7707 [2021-05-03 14:05:13,293 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:13,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7707 states. [2021-05-03 14:05:13,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7707 to 7206. [2021-05-03 14:05:13,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7206 states, 7205 states have (on average 3.5443442054129077) internal successors, (25537), 7205 states have internal predecessors, (25537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:13,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7206 states to 7206 states and 25537 transitions. [2021-05-03 14:05:13,420 INFO L78 Accepts]: Start accepts. Automaton has 7206 states and 25537 transitions. Word has length 20 [2021-05-03 14:05:13,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:13,420 INFO L480 AbstractCegarLoop]: Abstraction has 7206 states and 25537 transitions. [2021-05-03 14:05:13,420 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) [2021-05-03 14:05:13,421 INFO L276 IsEmpty]: Start isEmpty. Operand 7206 states and 25537 transitions. [2021-05-03 14:05:13,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:13,426 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:13,426 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:13,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3291,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:13,628 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:13,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:13,629 INFO L82 PathProgramCache]: Analyzing trace with hash -327506266, now seen corresponding path program 94 times [2021-05-03 14:05:13,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:13,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463620730] [2021-05-03 14:05:13,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:13,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:13,690 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:13,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463620730] [2021-05-03 14:05:13,690 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933341461] [2021-05-03 14:05:13,690 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) [2021-05-03 14:05:13,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:13,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:13,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:13,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:13,771 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:13,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:13,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:05:13,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603080394] [2021-05-03 14:05:13,771 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:05:13,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:13,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:05:13,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:05:13,772 INFO L87 Difference]: Start difference. First operand 7206 states and 25537 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) [2021-05-03 14:05:13,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:13,914 INFO L93 Difference]: Finished difference Result 8954 states and 30890 transitions. [2021-05-03 14:05:13,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:05:13,914 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 20 [2021-05-03 14:05:13,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:13,929 INFO L225 Difference]: With dead ends: 8954 [2021-05-03 14:05:13,929 INFO L226 Difference]: Without dead ends: 8954 [2021-05-03 14:05:13,930 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 98.2ms TimeCoverageRelationStatistics Valid=125, Invalid=217, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:05:13,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8954 states. [2021-05-03 14:05:14,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8954 to 8254. [2021-05-03 14:05:14,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8254 states, 8253 states have (on average 3.561008118260027) internal successors, (29389), 8253 states have internal predecessors, (29389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:14,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8254 states to 8254 states and 29389 transitions. [2021-05-03 14:05:14,079 INFO L78 Accepts]: Start accepts. Automaton has 8254 states and 29389 transitions. Word has length 20 [2021-05-03 14:05:14,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:14,079 INFO L480 AbstractCegarLoop]: Abstraction has 8254 states and 29389 transitions. [2021-05-03 14:05:14,080 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) [2021-05-03 14:05:14,080 INFO L276 IsEmpty]: Start isEmpty. Operand 8254 states and 29389 transitions. [2021-05-03 14:05:14,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:14,085 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:14,085 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:14,285 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3292,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:14,285 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:14,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:14,286 INFO L82 PathProgramCache]: Analyzing trace with hash 210349312, now seen corresponding path program 95 times [2021-05-03 14:05:14,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:14,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440868917] [2021-05-03 14:05:14,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:14,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:14,340 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:14,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440868917] [2021-05-03 14:05:14,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808846748] [2021-05-03 14:05:14,340 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 [2021-05-03 14:05:14,361 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:05:14,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:14,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:14,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:14,413 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:14,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:14,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:05:14,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186774863] [2021-05-03 14:05:14,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:05:14,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:14,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:05:14,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:05:14,414 INFO L87 Difference]: Start difference. First operand 8254 states and 29389 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) [2021-05-03 14:05:14,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:14,639 INFO L93 Difference]: Finished difference Result 9105 states and 31585 transitions. [2021-05-03 14:05:14,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:05:14,639 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 20 [2021-05-03 14:05:14,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:14,659 INFO L225 Difference]: With dead ends: 9105 [2021-05-03 14:05:14,659 INFO L226 Difference]: Without dead ends: 9105 [2021-05-03 14:05:14,659 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 152.6ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:05:14,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9105 states. [2021-05-03 14:05:14,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9105 to 8656. [2021-05-03 14:05:14,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8656 states, 8655 states have (on average 3.5648757943385325) internal successors, (30854), 8655 states have internal predecessors, (30854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:14,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8656 states to 8656 states and 30854 transitions. [2021-05-03 14:05:14,823 INFO L78 Accepts]: Start accepts. Automaton has 8656 states and 30854 transitions. Word has length 20 [2021-05-03 14:05:14,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:14,823 INFO L480 AbstractCegarLoop]: Abstraction has 8656 states and 30854 transitions. [2021-05-03 14:05:14,823 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) [2021-05-03 14:05:14,823 INFO L276 IsEmpty]: Start isEmpty. Operand 8656 states and 30854 transitions. [2021-05-03 14:05:14,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:14,828 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:14,828 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:15,028 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3293 [2021-05-03 14:05:15,029 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:15,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:15,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1155628672, now seen corresponding path program 96 times [2021-05-03 14:05:15,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:15,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001288680] [2021-05-03 14:05:15,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:15,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:15,097 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:15,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001288680] [2021-05-03 14:05:15,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813751958] [2021-05-03 14:05:15,097 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 [2021-05-03 14:05:15,130 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:05:15,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:15,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:15,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:15,167 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:15,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:15,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:05:15,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756299639] [2021-05-03 14:05:15,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:15,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:15,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:15,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:15,168 INFO L87 Difference]: Start difference. First operand 8656 states and 30854 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) [2021-05-03 14:05:15,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:15,294 INFO L93 Difference]: Finished difference Result 9529 states and 33025 transitions. [2021-05-03 14:05:15,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:05:15,295 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 [2021-05-03 14:05:15,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:15,312 INFO L225 Difference]: With dead ends: 9529 [2021-05-03 14:05:15,313 INFO L226 Difference]: Without dead ends: 9529 [2021-05-03 14:05:15,313 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 95.5ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:05:15,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9529 states. [2021-05-03 14:05:15,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9529 to 4249. [2021-05-03 14:05:15,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4249 states, 4248 states have (on average 3.398069679849341) internal successors, (14435), 4248 states have internal predecessors, (14435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:15,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4249 states to 4249 states and 14435 transitions. [2021-05-03 14:05:15,418 INFO L78 Accepts]: Start accepts. Automaton has 4249 states and 14435 transitions. Word has length 20 [2021-05-03 14:05:15,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:15,419 INFO L480 AbstractCegarLoop]: Abstraction has 4249 states and 14435 transitions. [2021-05-03 14:05:15,419 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) [2021-05-03 14:05:15,419 INFO L276 IsEmpty]: Start isEmpty. Operand 4249 states and 14435 transitions. [2021-05-03 14:05:15,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:15,423 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:15,423 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:15,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3294 [2021-05-03 14:05:15,629 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:15,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:15,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1693484250, now seen corresponding path program 97 times [2021-05-03 14:05:15,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:15,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313198735] [2021-05-03 14:05:15,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:15,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:15,698 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:15,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313198735] [2021-05-03 14:05:15,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302874115] [2021-05-03 14:05:15,699 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 [2021-05-03 14:05:15,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:15,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:15,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:15,766 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:15,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:15,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:05:15,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547758951] [2021-05-03 14:05:15,767 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:15,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:15,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:15,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:15,767 INFO L87 Difference]: Start difference. First operand 4249 states and 14435 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) [2021-05-03 14:05:15,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:15,896 INFO L93 Difference]: Finished difference Result 5911 states and 19624 transitions. [2021-05-03 14:05:15,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:05:15,896 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 [2021-05-03 14:05:15,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:15,905 INFO L225 Difference]: With dead ends: 5911 [2021-05-03 14:05:15,905 INFO L226 Difference]: Without dead ends: 5911 [2021-05-03 14:05:15,905 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:05:15,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5911 states. [2021-05-03 14:05:15,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5911 to 4539. [2021-05-03 14:05:15,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4539 states, 4538 states have (on average 3.4169237549581313) internal successors, (15506), 4538 states have internal predecessors, (15506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:15,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4539 states to 4539 states and 15506 transitions. [2021-05-03 14:05:15,982 INFO L78 Accepts]: Start accepts. Automaton has 4539 states and 15506 transitions. Word has length 20 [2021-05-03 14:05:15,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:15,982 INFO L480 AbstractCegarLoop]: Abstraction has 4539 states and 15506 transitions. [2021-05-03 14:05:15,982 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) [2021-05-03 14:05:15,982 INFO L276 IsEmpty]: Start isEmpty. Operand 4539 states and 15506 transitions. [2021-05-03 14:05:15,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:15,986 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:15,986 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:16,186 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3295,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:16,186 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:16,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:16,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1187137984, now seen corresponding path program 98 times [2021-05-03 14:05:16,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:16,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1422490521] [2021-05-03 14:05:16,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:16,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:16,262 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:16,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1422490521] [2021-05-03 14:05:16,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823503146] [2021-05-03 14:05:16,262 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 [2021-05-03 14:05:16,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:16,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:16,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:16,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:16,321 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:16,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:16,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:05:16,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650420237] [2021-05-03 14:05:16,322 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:16,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:16,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:16,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:16,322 INFO L87 Difference]: Start difference. First operand 4539 states and 15506 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) [2021-05-03 14:05:16,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:16,522 INFO L93 Difference]: Finished difference Result 5172 states and 16881 transitions. [2021-05-03 14:05:16,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:05:16,522 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 [2021-05-03 14:05:16,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:16,530 INFO L225 Difference]: With dead ends: 5172 [2021-05-03 14:05:16,531 INFO L226 Difference]: Without dead ends: 5172 [2021-05-03 14:05:16,531 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 173.0ms TimeCoverageRelationStatistics Valid=279, Invalid=533, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:05:16,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5172 states. [2021-05-03 14:05:16,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5172 to 4463. [2021-05-03 14:05:16,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4463 states, 4462 states have (on average 3.4195428059166293) internal successors, (15258), 4462 states have internal predecessors, (15258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:16,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4463 states to 4463 states and 15258 transitions. [2021-05-03 14:05:16,629 INFO L78 Accepts]: Start accepts. Automaton has 4463 states and 15258 transitions. Word has length 20 [2021-05-03 14:05:16,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:16,630 INFO L480 AbstractCegarLoop]: Abstraction has 4463 states and 15258 transitions. [2021-05-03 14:05:16,630 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) [2021-05-03 14:05:16,630 INFO L276 IsEmpty]: Start isEmpty. Operand 4463 states and 15258 transitions. [2021-05-03 14:05:16,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:16,634 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:16,634 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:16,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3296 [2021-05-03 14:05:16,836 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:16,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:16,836 INFO L82 PathProgramCache]: Analyzing trace with hash 2098857720, now seen corresponding path program 99 times [2021-05-03 14:05:16,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:16,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945077502] [2021-05-03 14:05:16,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:16,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:16,894 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:16,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945077502] [2021-05-03 14:05:16,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463550004] [2021-05-03 14:05:16,894 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 [2021-05-03 14:05:16,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:05:16,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:16,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:16,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:16,945 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:16,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:16,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:05:16,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107136600] [2021-05-03 14:05:16,946 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:05:16,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:16,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:05:16,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:05:16,946 INFO L87 Difference]: Start difference. First operand 4463 states and 15258 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) [2021-05-03 14:05:17,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:17,100 INFO L93 Difference]: Finished difference Result 4711 states and 15597 transitions. [2021-05-03 14:05:17,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:05:17,101 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 [2021-05-03 14:05:17,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:17,107 INFO L225 Difference]: With dead ends: 4711 [2021-05-03 14:05:17,107 INFO L226 Difference]: Without dead ends: 4707 [2021-05-03 14:05:17,108 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 102.8ms TimeCoverageRelationStatistics Valid=171, Invalid=291, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:05:17,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4707 states. [2021-05-03 14:05:17,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4707 to 4073. [2021-05-03 14:05:17,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4073 states, 4072 states have (on average 3.394400785854617) internal successors, (13822), 4072 states have internal predecessors, (13822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:17,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4073 states to 4073 states and 13822 transitions. [2021-05-03 14:05:17,166 INFO L78 Accepts]: Start accepts. Automaton has 4073 states and 13822 transitions. Word has length 20 [2021-05-03 14:05:17,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:17,166 INFO L480 AbstractCegarLoop]: Abstraction has 4073 states and 13822 transitions. [2021-05-03 14:05:17,166 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) [2021-05-03 14:05:17,166 INFO L276 IsEmpty]: Start isEmpty. Operand 4073 states and 13822 transitions. [2021-05-03 14:05:17,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:17,169 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:17,170 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:17,372 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3297 [2021-05-03 14:05:17,373 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:17,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:17,373 INFO L82 PathProgramCache]: Analyzing trace with hash -616888666, now seen corresponding path program 100 times [2021-05-03 14:05:17,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:17,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101041924] [2021-05-03 14:05:17,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:17,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:17,429 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:17,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101041924] [2021-05-03 14:05:17,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731302884] [2021-05-03 14:05:17,429 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 [2021-05-03 14:05:17,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:17,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:17,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:17,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:17,484 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 20 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:17,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:17,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:05:17,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255007537] [2021-05-03 14:05:17,485 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:05:17,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:17,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:05:17,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:05:17,485 INFO L87 Difference]: Start difference. First operand 4073 states and 13822 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) [2021-05-03 14:05:17,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:17,556 INFO L93 Difference]: Finished difference Result 4367 states and 14243 transitions. [2021-05-03 14:05:17,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:05:17,556 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 [2021-05-03 14:05:17,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:17,562 INFO L225 Difference]: With dead ends: 4367 [2021-05-03 14:05:17,562 INFO L226 Difference]: Without dead ends: 4367 [2021-05-03 14:05:17,562 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:17,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4367 states. [2021-05-03 14:05:17,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4367 to 4077. [2021-05-03 14:05:17,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4077 states, 4076 states have (on average 3.3851815505397447) internal successors, (13798), 4076 states have internal predecessors, (13798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:17,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4077 states to 4077 states and 13798 transitions. [2021-05-03 14:05:17,619 INFO L78 Accepts]: Start accepts. Automaton has 4077 states and 13798 transitions. Word has length 20 [2021-05-03 14:05:17,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:17,619 INFO L480 AbstractCegarLoop]: Abstraction has 4077 states and 13798 transitions. [2021-05-03 14:05:17,619 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) [2021-05-03 14:05:17,619 INFO L276 IsEmpty]: Start isEmpty. Operand 4077 states and 13798 transitions. [2021-05-03 14:05:17,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:17,622 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:17,622 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:17,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3298 [2021-05-03 14:05:17,824 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:17,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:17,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1949031296, now seen corresponding path program 101 times [2021-05-03 14:05:17,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:17,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682378946] [2021-05-03 14:05:17,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:17,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:17,886 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:17,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682378946] [2021-05-03 14:05:17,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017544537] [2021-05-03 14:05:17,887 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 [2021-05-03 14:05:17,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:05:17,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:17,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:17,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:17,962 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:17,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:17,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:05:17,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483388398] [2021-05-03 14:05:17,963 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:17,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:17,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:17,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:17,963 INFO L87 Difference]: Start difference. First operand 4077 states and 13798 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) [2021-05-03 14:05:18,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:18,050 INFO L93 Difference]: Finished difference Result 4294 states and 13975 transitions. [2021-05-03 14:05:18,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:05:18,051 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 [2021-05-03 14:05:18,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:18,060 INFO L225 Difference]: With dead ends: 4294 [2021-05-03 14:05:18,060 INFO L226 Difference]: Without dead ends: 4294 [2021-05-03 14:05:18,060 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 72.4ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:05:18,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4294 states. [2021-05-03 14:05:18,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4294 to 3913. [2021-05-03 14:05:18,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3913 states, 3912 states have (on average 3.3785787321063396) internal successors, (13217), 3912 states have internal predecessors, (13217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:18,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 13217 transitions. [2021-05-03 14:05:18,142 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 13217 transitions. Word has length 20 [2021-05-03 14:05:18,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:18,143 INFO L480 AbstractCegarLoop]: Abstraction has 3913 states and 13217 transitions. [2021-05-03 14:05:18,143 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) [2021-05-03 14:05:18,143 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 13217 transitions. [2021-05-03 14:05:18,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:18,147 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:18,147 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:18,364 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3299,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:18,365 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:18,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:18,365 INFO L82 PathProgramCache]: Analyzing trace with hash -111828506, now seen corresponding path program 102 times [2021-05-03 14:05:18,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:18,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020582245] [2021-05-03 14:05:18,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:18,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:18,426 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:18,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020582245] [2021-05-03 14:05:18,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003577312] [2021-05-03 14:05:18,426 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 [2021-05-03 14:05:18,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:05:18,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:18,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:18,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:18,489 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:18,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:18,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:18,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680287943] [2021-05-03 14:05:18,489 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:18,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:18,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:18,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:18,490 INFO L87 Difference]: Start difference. First operand 3913 states and 13217 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:18,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:18,616 INFO L93 Difference]: Finished difference Result 4333 states and 14025 transitions. [2021-05-03 14:05:18,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:05:18,617 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-05-03 14:05:18,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:18,624 INFO L225 Difference]: With dead ends: 4333 [2021-05-03 14:05:18,625 INFO L226 Difference]: Without dead ends: 4333 [2021-05-03 14:05:18,625 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 94.6ms TimeCoverageRelationStatistics Valid=140, Invalid=240, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:05:18,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4333 states. [2021-05-03 14:05:18,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4333 to 3900. [2021-05-03 14:05:18,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3900 states, 3899 states have (on average 3.368043087971275) internal successors, (13132), 3899 states have internal predecessors, (13132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:18,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3900 states to 3900 states and 13132 transitions. [2021-05-03 14:05:18,679 INFO L78 Accepts]: Start accepts. Automaton has 3900 states and 13132 transitions. Word has length 20 [2021-05-03 14:05:18,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:18,679 INFO L480 AbstractCegarLoop]: Abstraction has 3900 states and 13132 transitions. [2021-05-03 14:05:18,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:18,680 INFO L276 IsEmpty]: Start isEmpty. Operand 3900 states and 13132 transitions. [2021-05-03 14:05:18,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:18,683 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:18,683 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:18,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3300,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:18,883 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:18,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:18,884 INFO L82 PathProgramCache]: Analyzing trace with hash 426027072, now seen corresponding path program 103 times [2021-05-03 14:05:18,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:18,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235899644] [2021-05-03 14:05:18,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:18,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:18,944 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:18,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235899644] [2021-05-03 14:05:18,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597094075] [2021-05-03 14:05:18,944 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 [2021-05-03 14:05:18,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:18,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:18,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:19,005 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:19,005 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:19,005 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:19,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808983044] [2021-05-03 14:05:19,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:19,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:19,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:19,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:19,006 INFO L87 Difference]: Start difference. First operand 3900 states and 13132 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:19,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:19,133 INFO L93 Difference]: Finished difference Result 5075 states and 16651 transitions. [2021-05-03 14:05:19,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:05:19,134 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-05-03 14:05:19,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:19,141 INFO L225 Difference]: With dead ends: 5075 [2021-05-03 14:05:19,141 INFO L226 Difference]: Without dead ends: 5075 [2021-05-03 14:05:19,142 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 97.0ms TimeCoverageRelationStatistics Valid=144, Invalid=276, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:05:19,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5075 states. [2021-05-03 14:05:19,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5075 to 4093. [2021-05-03 14:05:19,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4093 states, 4092 states have (on average 3.374144672531769) internal successors, (13807), 4092 states have internal predecessors, (13807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:19,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4093 states to 4093 states and 13807 transitions. [2021-05-03 14:05:19,210 INFO L78 Accepts]: Start accepts. Automaton has 4093 states and 13807 transitions. Word has length 20 [2021-05-03 14:05:19,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:19,210 INFO L480 AbstractCegarLoop]: Abstraction has 4093 states and 13807 transitions. [2021-05-03 14:05:19,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:19,210 INFO L276 IsEmpty]: Start isEmpty. Operand 4093 states and 13807 transitions. [2021-05-03 14:05:19,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:19,213 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:19,213 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:19,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3301 [2021-05-03 14:05:19,414 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:19,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:19,414 INFO L82 PathProgramCache]: Analyzing trace with hash -80319194, now seen corresponding path program 104 times [2021-05-03 14:05:19,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:19,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165260859] [2021-05-03 14:05:19,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:19,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:19,478 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:19,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165260859] [2021-05-03 14:05:19,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030580037] [2021-05-03 14:05:19,478 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) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:19,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:19,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:19,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:19,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:19,545 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:19,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:19,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:19,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903760806] [2021-05-03 14:05:19,545 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:19,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:19,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:19,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:19,546 INFO L87 Difference]: Start difference. First operand 4093 states and 13807 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:19,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:19,707 INFO L93 Difference]: Finished difference Result 4713 states and 15274 transitions. [2021-05-03 14:05:19,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:05:19,708 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-05-03 14:05:19,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:19,714 INFO L225 Difference]: With dead ends: 4713 [2021-05-03 14:05:19,714 INFO L226 Difference]: Without dead ends: 4713 [2021-05-03 14:05:19,714 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 149.3ms TimeCoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:05:19,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4713 states. [2021-05-03 14:05:19,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4713 to 4207. [2021-05-03 14:05:19,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4207 states, 4206 states have (on average 3.378982406086543) internal successors, (14212), 4206 states have internal predecessors, (14212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:19,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4207 states to 4207 states and 14212 transitions. [2021-05-03 14:05:19,771 INFO L78 Accepts]: Start accepts. Automaton has 4207 states and 14212 transitions. Word has length 20 [2021-05-03 14:05:19,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:19,771 INFO L480 AbstractCegarLoop]: Abstraction has 4207 states and 14212 transitions. [2021-05-03 14:05:19,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:19,771 INFO L276 IsEmpty]: Start isEmpty. Operand 4207 states and 14212 transitions. [2021-05-03 14:05:19,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:19,774 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:19,774 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:19,974 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3302,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:19,974 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:19,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:19,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1402815744, now seen corresponding path program 105 times [2021-05-03 14:05:19,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:19,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107660877] [2021-05-03 14:05:19,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:19,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:20,043 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:20,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107660877] [2021-05-03 14:05:20,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2129901201] [2021-05-03 14:05:20,043 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 [2021-05-03 14:05:20,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:05:20,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:20,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:20,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:20,119 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:20,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:20,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:20,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132900438] [2021-05-03 14:05:20,120 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:20,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:20,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:20,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:20,120 INFO L87 Difference]: Start difference. First operand 4207 states and 14212 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:20,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:20,379 INFO L93 Difference]: Finished difference Result 5066 states and 16291 transitions. [2021-05-03 14:05:20,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:05:20,379 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-05-03 14:05:20,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:20,385 INFO L225 Difference]: With dead ends: 5066 [2021-05-03 14:05:20,386 INFO L226 Difference]: Without dead ends: 5066 [2021-05-03 14:05:20,386 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 224.9ms TimeCoverageRelationStatistics Valid=406, Invalid=784, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:05:20,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5066 states. [2021-05-03 14:05:20,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5066 to 4561. [2021-05-03 14:05:20,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4561 states, 4560 states have (on average 3.3802631578947366) internal successors, (15414), 4560 states have internal predecessors, (15414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:20,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4561 states to 4561 states and 15414 transitions. [2021-05-03 14:05:20,454 INFO L78 Accepts]: Start accepts. Automaton has 4561 states and 15414 transitions. Word has length 20 [2021-05-03 14:05:20,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:20,454 INFO L480 AbstractCegarLoop]: Abstraction has 4561 states and 15414 transitions. [2021-05-03 14:05:20,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:20,454 INFO L276 IsEmpty]: Start isEmpty. Operand 4561 states and 15414 transitions. [2021-05-03 14:05:20,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:20,458 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:20,458 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:20,658 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3303,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:20,658 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:20,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:20,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1590980808, now seen corresponding path program 106 times [2021-05-03 14:05:20,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:20,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771571543] [2021-05-03 14:05:20,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:20,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:20,717 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:20,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771571543] [2021-05-03 14:05:20,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459366720] [2021-05-03 14:05:20,717 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) [2021-05-03 14:05:20,755 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:20,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:20,755 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:20,756 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:20,794 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:05:20,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:20,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:05:20,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288688235] [2021-05-03 14:05:20,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:05:20,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:20,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:05:20,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:05:20,795 INFO L87 Difference]: Start difference. First operand 4561 states and 15414 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) [2021-05-03 14:05:20,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:20,995 INFO L93 Difference]: Finished difference Result 5249 states and 17354 transitions. [2021-05-03 14:05:20,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:05:20,996 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 20 [2021-05-03 14:05:20,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:21,005 INFO L225 Difference]: With dead ends: 5249 [2021-05-03 14:05:21,006 INFO L226 Difference]: Without dead ends: 5245 [2021-05-03 14:05:21,006 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:05:21,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5245 states. [2021-05-03 14:05:21,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5245 to 4651. [2021-05-03 14:05:21,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4651 states, 4650 states have (on average 3.3821505376344088) internal successors, (15727), 4650 states have internal predecessors, (15727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:21,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 15727 transitions. [2021-05-03 14:05:21,097 INFO L78 Accepts]: Start accepts. Automaton has 4651 states and 15727 transitions. Word has length 20 [2021-05-03 14:05:21,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:21,097 INFO L480 AbstractCegarLoop]: Abstraction has 4651 states and 15727 transitions. [2021-05-03 14:05:21,097 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) [2021-05-03 14:05:21,097 INFO L276 IsEmpty]: Start isEmpty. Operand 4651 states and 15727 transitions. [2021-05-03 14:05:21,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:21,101 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:21,102 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:21,316 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3304,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:21,317 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:21,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:21,317 INFO L82 PathProgramCache]: Analyzing trace with hash 713013304, now seen corresponding path program 107 times [2021-05-03 14:05:21,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:21,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467081703] [2021-05-03 14:05:21,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:21,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:21,369 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:21,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467081703] [2021-05-03 14:05:21,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406040564] [2021-05-03 14:05:21,369 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) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:21,389 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:05:21,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:21,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:21,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:21,425 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:21,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:21,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:05:21,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715411716] [2021-05-03 14:05:21,425 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:05:21,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:21,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:05:21,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:05:21,425 INFO L87 Difference]: Start difference. First operand 4651 states and 15727 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) [2021-05-03 14:05:21,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:21,576 INFO L93 Difference]: Finished difference Result 5919 states and 19183 transitions. [2021-05-03 14:05:21,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:05:21,577 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 20 [2021-05-03 14:05:21,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:21,584 INFO L225 Difference]: With dead ends: 5919 [2021-05-03 14:05:21,584 INFO L226 Difference]: Without dead ends: 5919 [2021-05-03 14:05:21,585 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 114.0ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:05:21,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5919 states. [2021-05-03 14:05:21,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5919 to 5338. [2021-05-03 14:05:21,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5338 states, 5337 states have (on average 3.389357316844669) internal successors, (18089), 5337 states have internal predecessors, (18089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:21,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5338 states to 5338 states and 18089 transitions. [2021-05-03 14:05:21,670 INFO L78 Accepts]: Start accepts. Automaton has 5338 states and 18089 transitions. Word has length 20 [2021-05-03 14:05:21,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:21,670 INFO L480 AbstractCegarLoop]: Abstraction has 5338 states and 18089 transitions. [2021-05-03 14:05:21,670 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) [2021-05-03 14:05:21,670 INFO L276 IsEmpty]: Start isEmpty. Operand 5338 states and 18089 transitions. [2021-05-03 14:05:21,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:21,674 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:21,674 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:21,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3305,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:21,875 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:21,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:21,875 INFO L82 PathProgramCache]: Analyzing trace with hash -2098819054, now seen corresponding path program 108 times [2021-05-03 14:05:21,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:21,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322651894] [2021-05-03 14:05:21,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:21,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:21,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322651894] [2021-05-03 14:05:21,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067665630] [2021-05-03 14:05:21,940 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 [2021-05-03 14:05:21,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:05:21,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:21,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:21,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:21,996 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:21,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:21,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:05:21,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643189202] [2021-05-03 14:05:21,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:21,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:21,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:21,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:21,997 INFO L87 Difference]: Start difference. First operand 5338 states and 18089 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) [2021-05-03 14:05:22,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:22,141 INFO L93 Difference]: Finished difference Result 6269 states and 20414 transitions. [2021-05-03 14:05:22,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:05:22,141 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 [2021-05-03 14:05:22,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:22,151 INFO L225 Difference]: With dead ends: 6269 [2021-05-03 14:05:22,151 INFO L226 Difference]: Without dead ends: 6269 [2021-05-03 14:05:22,151 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 116.8ms TimeCoverageRelationStatistics Valid=195, Invalid=357, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:05:22,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6269 states. [2021-05-03 14:05:22,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6269 to 4444. [2021-05-03 14:05:22,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4444 states, 4443 states have (on average 3.356290794508215) internal successors, (14912), 4443 states have internal predecessors, (14912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:22,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4444 states to 4444 states and 14912 transitions. [2021-05-03 14:05:22,226 INFO L78 Accepts]: Start accepts. Automaton has 4444 states and 14912 transitions. Word has length 20 [2021-05-03 14:05:22,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:22,226 INFO L480 AbstractCegarLoop]: Abstraction has 4444 states and 14912 transitions. [2021-05-03 14:05:22,226 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) [2021-05-03 14:05:22,226 INFO L276 IsEmpty]: Start isEmpty. Operand 4444 states and 14912 transitions. [2021-05-03 14:05:22,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:22,229 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:22,229 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:22,441 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3306 [2021-05-03 14:05:22,441 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:22,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:22,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1689801976, now seen corresponding path program 109 times [2021-05-03 14:05:22,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:22,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710661723] [2021-05-03 14:05:22,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:22,507 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:22,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710661723] [2021-05-03 14:05:22,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464639166] [2021-05-03 14:05:22,507 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 [2021-05-03 14:05:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:22,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:22,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:22,563 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:22,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:22,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:05:22,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237640285] [2021-05-03 14:05:22,563 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:22,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:22,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:22,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:22,564 INFO L87 Difference]: Start difference. First operand 4444 states and 14912 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) [2021-05-03 14:05:22,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:22,758 INFO L93 Difference]: Finished difference Result 5453 states and 17524 transitions. [2021-05-03 14:05:22,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:05:22,759 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 [2021-05-03 14:05:22,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:22,766 INFO L225 Difference]: With dead ends: 5453 [2021-05-03 14:05:22,766 INFO L226 Difference]: Without dead ends: 5453 [2021-05-03 14:05:22,766 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 170.9ms TimeCoverageRelationStatistics Valid=278, Invalid=534, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:05:22,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5453 states. [2021-05-03 14:05:22,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5453 to 4957. [2021-05-03 14:05:22,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4957 states, 4956 states have (on average 3.3668280871670704) internal successors, (16686), 4956 states have internal predecessors, (16686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:22,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4957 states to 4957 states and 16686 transitions. [2021-05-03 14:05:22,833 INFO L78 Accepts]: Start accepts. Automaton has 4957 states and 16686 transitions. Word has length 20 [2021-05-03 14:05:22,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:22,833 INFO L480 AbstractCegarLoop]: Abstraction has 4957 states and 16686 transitions. [2021-05-03 14:05:22,833 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) [2021-05-03 14:05:22,833 INFO L276 IsEmpty]: Start isEmpty. Operand 4957 states and 16686 transitions. [2021-05-03 14:05:22,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:22,837 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:22,837 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:23,052 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3307,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:23,053 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:23,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:23,053 INFO L82 PathProgramCache]: Analyzing trace with hash 928691064, now seen corresponding path program 110 times [2021-05-03 14:05:23,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:23,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883613765] [2021-05-03 14:05:23,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:23,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:23,113 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:23,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883613765] [2021-05-03 14:05:23,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233602186] [2021-05-03 14:05:23,113 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 [2021-05-03 14:05:23,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:23,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:23,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:23,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:23,176 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 14 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:23,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:23,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:23,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395832602] [2021-05-03 14:05:23,177 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:23,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:23,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:23,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:23,177 INFO L87 Difference]: Start difference. First operand 4957 states and 16686 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:23,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:23,318 INFO L93 Difference]: Finished difference Result 5535 states and 17962 transitions. [2021-05-03 14:05:23,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:05:23,319 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-05-03 14:05:23,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:23,327 INFO L225 Difference]: With dead ends: 5535 [2021-05-03 14:05:23,327 INFO L226 Difference]: Without dead ends: 5535 [2021-05-03 14:05:23,328 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 119.8ms TimeCoverageRelationStatistics Valid=197, Invalid=355, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:05:23,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5535 states. [2021-05-03 14:05:23,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5535 to 4104. [2021-05-03 14:05:23,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4104 states, 4103 states have (on average 3.3346331952230077) internal successors, (13682), 4103 states have internal predecessors, (13682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:23,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 13682 transitions. [2021-05-03 14:05:23,397 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 13682 transitions. Word has length 20 [2021-05-03 14:05:23,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:23,397 INFO L480 AbstractCegarLoop]: Abstraction has 4104 states and 13682 transitions. [2021-05-03 14:05:23,397 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:23,397 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 13682 transitions. [2021-05-03 14:05:23,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:23,401 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:23,401 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:23,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3308 [2021-05-03 14:05:23,601 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:23,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:23,602 INFO L82 PathProgramCache]: Analyzing trace with hash 422344798, now seen corresponding path program 111 times [2021-05-03 14:05:23,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:23,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840335751] [2021-05-03 14:05:23,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:23,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:23,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840335751] [2021-05-03 14:05:23,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637307018] [2021-05-03 14:05:23,696 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 [2021-05-03 14:05:23,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:05:23,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:23,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:23,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:23,771 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:23,772 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:23,772 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:23,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908019079] [2021-05-03 14:05:23,772 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:23,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:23,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:23,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:23,773 INFO L87 Difference]: Start difference. First operand 4104 states and 13682 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:23,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:23,991 INFO L93 Difference]: Finished difference Result 4959 states and 15903 transitions. [2021-05-03 14:05:23,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:05:23,992 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-05-03 14:05:23,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:24,000 INFO L225 Difference]: With dead ends: 4959 [2021-05-03 14:05:24,000 INFO L226 Difference]: Without dead ends: 4959 [2021-05-03 14:05:24,001 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 186.3ms TimeCoverageRelationStatistics Valid=235, Invalid=467, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:05:24,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4959 states. [2021-05-03 14:05:24,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4959 to 3875. [2021-05-03 14:05:24,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3875 states, 3874 states have (on average 3.3304078471863705) internal successors, (12902), 3874 states have internal predecessors, (12902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:24,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3875 states to 3875 states and 12902 transitions. [2021-05-03 14:05:24,078 INFO L78 Accepts]: Start accepts. Automaton has 3875 states and 12902 transitions. Word has length 20 [2021-05-03 14:05:24,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:24,079 INFO L480 AbstractCegarLoop]: Abstraction has 3875 states and 12902 transitions. [2021-05-03 14:05:24,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:24,079 INFO L276 IsEmpty]: Start isEmpty. Operand 3875 states and 12902 transitions. [2021-05-03 14:05:24,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:24,083 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:24,083 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:24,305 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3309 [2021-05-03 14:05:24,305 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:24,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:24,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1905479736, now seen corresponding path program 112 times [2021-05-03 14:05:24,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:24,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105089755] [2021-05-03 14:05:24,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:24,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:24,372 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:24,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105089755] [2021-05-03 14:05:24,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1886042] [2021-05-03 14:05:24,372 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:24,394 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:24,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:24,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:24,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:24,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:24,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:24,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432967370] [2021-05-03 14:05:24,441 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:24,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:24,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:24,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:24,441 INFO L87 Difference]: Start difference. First operand 3875 states and 12902 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:24,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:24,715 INFO L93 Difference]: Finished difference Result 4630 states and 14540 transitions. [2021-05-03 14:05:24,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:05:24,715 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-05-03 14:05:24,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:24,721 INFO L225 Difference]: With dead ends: 4630 [2021-05-03 14:05:24,721 INFO L226 Difference]: Without dead ends: 4630 [2021-05-03 14:05:24,721 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 230.6ms TimeCoverageRelationStatistics Valid=405, Invalid=785, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:05:24,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4630 states. [2021-05-03 14:05:24,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4630 to 3885. [2021-05-03 14:05:24,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3885 states, 3884 states have (on average 3.33264675592173) internal successors, (12944), 3884 states have internal predecessors, (12944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:24,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3885 states to 3885 states and 12944 transitions. [2021-05-03 14:05:24,771 INFO L78 Accepts]: Start accepts. Automaton has 3885 states and 12944 transitions. Word has length 20 [2021-05-03 14:05:24,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:24,771 INFO L480 AbstractCegarLoop]: Abstraction has 3885 states and 12944 transitions. [2021-05-03 14:05:24,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:24,771 INFO L276 IsEmpty]: Start isEmpty. Operand 3885 states and 12944 transitions. [2021-05-03 14:05:24,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:24,774 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:24,774 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:24,995 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3310,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:24,995 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:24,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:24,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1965054858, now seen corresponding path program 113 times [2021-05-03 14:05:24,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:24,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104681106] [2021-05-03 14:05:24,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:25,048 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:25,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104681106] [2021-05-03 14:05:25,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218234364] [2021-05-03 14:05:25,048 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 [2021-05-03 14:05:25,068 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:05:25,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:25,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:25,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:25,112 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:25,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:25,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:05:25,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975362109] [2021-05-03 14:05:25,113 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:05:25,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:25,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:05:25,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:05:25,113 INFO L87 Difference]: Start difference. First operand 3885 states and 12944 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) [2021-05-03 14:05:25,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:25,257 INFO L93 Difference]: Finished difference Result 4118 states and 13256 transitions. [2021-05-03 14:05:25,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:05:25,257 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 [2021-05-03 14:05:25,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:25,261 INFO L225 Difference]: With dead ends: 4118 [2021-05-03 14:05:25,262 INFO L226 Difference]: Without dead ends: 4114 [2021-05-03 14:05:25,262 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 100.3ms TimeCoverageRelationStatistics Valid=170, Invalid=292, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:05:25,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4114 states. [2021-05-03 14:05:25,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4114 to 3838. [2021-05-03 14:05:25,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 3.3281209278081834) internal successors, (12770), 3837 states have internal predecessors, (12770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:25,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 12770 transitions. [2021-05-03 14:05:25,307 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 12770 transitions. Word has length 20 [2021-05-03 14:05:25,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:25,307 INFO L480 AbstractCegarLoop]: Abstraction has 3838 states and 12770 transitions. [2021-05-03 14:05:25,307 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) [2021-05-03 14:05:25,307 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 12770 transitions. [2021-05-03 14:05:25,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:25,310 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:25,310 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:25,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3311,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:25,510 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:25,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:25,511 INFO L82 PathProgramCache]: Analyzing trace with hash -750691528, now seen corresponding path program 114 times [2021-05-03 14:05:25,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:25,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782094330] [2021-05-03 14:05:25,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:25,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:25,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782094330] [2021-05-03 14:05:25,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678205759] [2021-05-03 14:05:25,568 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 [2021-05-03 14:05:25,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:05:25,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:25,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:25,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:25,625 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 17 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:25,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:25,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:05:25,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692863964] [2021-05-03 14:05:25,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:05:25,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:25,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:05:25,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:05:25,626 INFO L87 Difference]: Start difference. First operand 3838 states and 12770 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) [2021-05-03 14:05:25,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:25,700 INFO L93 Difference]: Finished difference Result 4108 states and 13151 transitions. [2021-05-03 14:05:25,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:05:25,700 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 [2021-05-03 14:05:25,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:25,705 INFO L225 Difference]: With dead ends: 4108 [2021-05-03 14:05:25,705 INFO L226 Difference]: Without dead ends: 4108 [2021-05-03 14:05:25,705 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 65.7ms TimeCoverageRelationStatistics Valid=98, Invalid=142, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:05:25,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4108 states. [2021-05-03 14:05:25,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4108 to 3833. [2021-05-03 14:05:25,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 3.325678496868476) internal successors, (12744), 3832 states have internal predecessors, (12744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:25,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 12744 transitions. [2021-05-03 14:05:25,756 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 12744 transitions. Word has length 20 [2021-05-03 14:05:25,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:25,756 INFO L480 AbstractCegarLoop]: Abstraction has 3833 states and 12744 transitions. [2021-05-03 14:05:25,757 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) [2021-05-03 14:05:25,757 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 12744 transitions. [2021-05-03 14:05:25,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:25,759 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:25,759 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:25,961 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3312,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:25,961 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:25,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:25,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1815228434, now seen corresponding path program 115 times [2021-05-03 14:05:25,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:25,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576232775] [2021-05-03 14:05:25,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:25,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:26,013 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:26,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576232775] [2021-05-03 14:05:26,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484571625] [2021-05-03 14:05:26,014 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 [2021-05-03 14:05:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:26,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:26,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:26,084 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:26,084 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:26,084 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:05:26,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382694002] [2021-05-03 14:05:26,084 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:26,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:26,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:26,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:26,085 INFO L87 Difference]: Start difference. First operand 3833 states and 12744 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) [2021-05-03 14:05:26,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:26,176 INFO L93 Difference]: Finished difference Result 4122 states and 13177 transitions. [2021-05-03 14:05:26,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:05:26,176 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 [2021-05-03 14:05:26,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:26,182 INFO L225 Difference]: With dead ends: 4122 [2021-05-03 14:05:26,182 INFO L226 Difference]: Without dead ends: 4122 [2021-05-03 14:05:26,182 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 74.3ms TimeCoverageRelationStatistics Valid=117, Invalid=189, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:26,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4122 states. [2021-05-03 14:05:26,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4122 to 3834. [2021-05-03 14:05:26,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3834 states, 3833 states have (on average 3.3229846073571614) internal successors, (12737), 3833 states have internal predecessors, (12737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:26,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3834 states to 3834 states and 12737 transitions. [2021-05-03 14:05:26,236 INFO L78 Accepts]: Start accepts. Automaton has 3834 states and 12737 transitions. Word has length 20 [2021-05-03 14:05:26,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:26,236 INFO L480 AbstractCegarLoop]: Abstraction has 3834 states and 12737 transitions. [2021-05-03 14:05:26,236 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) [2021-05-03 14:05:26,236 INFO L276 IsEmpty]: Start isEmpty. Operand 3834 states and 12737 transitions. [2021-05-03 14:05:26,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:26,239 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:26,239 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:26,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3313,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:26,440 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:26,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:26,440 INFO L82 PathProgramCache]: Analyzing trace with hash -245631368, now seen corresponding path program 116 times [2021-05-03 14:05:26,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:26,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770520821] [2021-05-03 14:05:26,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:26,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:26,503 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:26,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770520821] [2021-05-03 14:05:26,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144991593] [2021-05-03 14:05:26,503 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 [2021-05-03 14:05:26,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:26,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:26,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:26,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:26,605 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:26,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:26,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:05:26,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798779836] [2021-05-03 14:05:26,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:26,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:26,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:26,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:26,606 INFO L87 Difference]: Start difference. First operand 3834 states and 12737 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) [2021-05-03 14:05:26,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:26,697 INFO L93 Difference]: Finished difference Result 5426 states and 17609 transitions. [2021-05-03 14:05:26,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-03 14:05:26,697 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 [2021-05-03 14:05:26,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:26,707 INFO L225 Difference]: With dead ends: 5426 [2021-05-03 14:05:26,708 INFO L226 Difference]: Without dead ends: 5426 [2021-05-03 14:05:26,708 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:05:26,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-05-03 14:05:26,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 5130. [2021-05-03 14:05:26,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5130 states, 5129 states have (on average 3.3450965100409435) internal successors, (17157), 5129 states have internal predecessors, (17157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:26,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5130 states to 5130 states and 17157 transitions. [2021-05-03 14:05:26,802 INFO L78 Accepts]: Start accepts. Automaton has 5130 states and 17157 transitions. Word has length 20 [2021-05-03 14:05:26,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:26,802 INFO L480 AbstractCegarLoop]: Abstraction has 5130 states and 17157 transitions. [2021-05-03 14:05:26,802 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) [2021-05-03 14:05:26,802 INFO L276 IsEmpty]: Start isEmpty. Operand 5130 states and 17157 transitions. [2021-05-03 14:05:26,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:26,807 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:26,807 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:27,029 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3314,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:27,029 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:27,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:27,029 INFO L82 PathProgramCache]: Analyzing trace with hash 292224210, now seen corresponding path program 117 times [2021-05-03 14:05:27,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:27,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645334592] [2021-05-03 14:05:27,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:27,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:27,103 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:27,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645334592] [2021-05-03 14:05:27,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837240836] [2021-05-03 14:05:27,104 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) [2021-05-03 14:05:27,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:05:27,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:27,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:27,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:27,189 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:27,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:27,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:27,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456423108] [2021-05-03 14:05:27,189 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:27,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:27,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:27,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:27,190 INFO L87 Difference]: Start difference. First operand 5130 states and 17157 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:27,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:27,337 INFO L93 Difference]: Finished difference Result 5508 states and 17780 transitions. [2021-05-03 14:05:27,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:05:27,338 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-05-03 14:05:27,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:27,348 INFO L225 Difference]: With dead ends: 5508 [2021-05-03 14:05:27,348 INFO L226 Difference]: Without dead ends: 5508 [2021-05-03 14:05:27,348 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=162, Invalid=300, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:05:27,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5508 states. [2021-05-03 14:05:27,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5508 to 5142. [2021-05-03 14:05:27,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5142 states, 5141 states have (on average 3.3433184205407507) internal successors, (17188), 5141 states have internal predecessors, (17188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:27,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5142 states to 5142 states and 17188 transitions. [2021-05-03 14:05:27,436 INFO L78 Accepts]: Start accepts. Automaton has 5142 states and 17188 transitions. Word has length 20 [2021-05-03 14:05:27,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:27,436 INFO L480 AbstractCegarLoop]: Abstraction has 5142 states and 17188 transitions. [2021-05-03 14:05:27,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:27,436 INFO L276 IsEmpty]: Start isEmpty. Operand 5142 states and 17188 transitions. [2021-05-03 14:05:27,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:27,440 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:27,440 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:27,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3315 [2021-05-03 14:05:27,655 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:27,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:27,655 INFO L82 PathProgramCache]: Analyzing trace with hash -214122056, now seen corresponding path program 118 times [2021-05-03 14:05:27,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:27,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060917239] [2021-05-03 14:05:27,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:27,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:27,717 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:27,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060917239] [2021-05-03 14:05:27,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854857846] [2021-05-03 14:05:27,717 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 [2021-05-03 14:05:27,735 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:27,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:27,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:27,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:27,780 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:27,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:27,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:27,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856233513] [2021-05-03 14:05:27,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:27,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:27,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:27,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:27,781 INFO L87 Difference]: Start difference. First operand 5142 states and 17188 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:27,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:27,906 INFO L93 Difference]: Finished difference Result 5808 states and 18946 transitions. [2021-05-03 14:05:27,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:05:27,906 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-05-03 14:05:27,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:27,914 INFO L225 Difference]: With dead ends: 5808 [2021-05-03 14:05:27,915 INFO L226 Difference]: Without dead ends: 5808 [2021-05-03 14:05:27,915 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 116.7ms TimeCoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:05:27,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5808 states. [2021-05-03 14:05:27,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5808 to 5576. [2021-05-03 14:05:27,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5576 states, 5575 states have (on average 3.337219730941704) internal successors, (18605), 5575 states have internal predecessors, (18605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:27,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5576 states to 5576 states and 18605 transitions. [2021-05-03 14:05:27,989 INFO L78 Accepts]: Start accepts. Automaton has 5576 states and 18605 transitions. Word has length 20 [2021-05-03 14:05:27,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:27,989 INFO L480 AbstractCegarLoop]: Abstraction has 5576 states and 18605 transitions. [2021-05-03 14:05:27,989 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:27,989 INFO L276 IsEmpty]: Start isEmpty. Operand 5576 states and 18605 transitions. [2021-05-03 14:05:27,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:27,993 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:27,993 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:28,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3316,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:28,193 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:28,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:28,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1269012882, now seen corresponding path program 119 times [2021-05-03 14:05:28,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:28,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778487930] [2021-05-03 14:05:28,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:28,269 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:28,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778487930] [2021-05-03 14:05:28,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838768000] [2021-05-03 14:05:28,269 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 [2021-05-03 14:05:28,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:05:28,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:28,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:28,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:28,341 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:28,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:28,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:28,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553662392] [2021-05-03 14:05:28,341 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:28,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:28,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:28,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:28,342 INFO L87 Difference]: Start difference. First operand 5576 states and 18605 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:28,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:28,556 INFO L93 Difference]: Finished difference Result 6051 states and 19578 transitions. [2021-05-03 14:05:28,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:05:28,556 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-05-03 14:05:28,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:28,566 INFO L225 Difference]: With dead ends: 6051 [2021-05-03 14:05:28,566 INFO L226 Difference]: Without dead ends: 6051 [2021-05-03 14:05:28,566 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 197.4ms TimeCoverageRelationStatistics Valid=306, Invalid=624, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:05:28,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6051 states. [2021-05-03 14:05:28,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6051 to 5723. [2021-05-03 14:05:28,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5723 states, 5722 states have (on average 3.3318769660957708) internal successors, (19065), 5722 states have internal predecessors, (19065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:28,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5723 states to 5723 states and 19065 transitions. [2021-05-03 14:05:28,653 INFO L78 Accepts]: Start accepts. Automaton has 5723 states and 19065 transitions. Word has length 20 [2021-05-03 14:05:28,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:28,654 INFO L480 AbstractCegarLoop]: Abstraction has 5723 states and 19065 transitions. [2021-05-03 14:05:28,654 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:28,654 INFO L276 IsEmpty]: Start isEmpty. Operand 5723 states and 19065 transitions. [2021-05-03 14:05:28,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:28,658 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:28,658 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:28,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3317,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:28,858 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:28,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:28,859 INFO L82 PathProgramCache]: Analyzing trace with hash 1555704, now seen corresponding path program 120 times [2021-05-03 14:05:28,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:28,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355965903] [2021-05-03 14:05:28,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:28,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:28,972 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:28,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355965903] [2021-05-03 14:05:28,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127649824] [2021-05-03 14:05:28,972 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 [2021-05-03 14:05:28,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:05:28,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:28,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:28,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:29,036 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:29,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:29,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:29,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649459579] [2021-05-03 14:05:29,036 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:29,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:29,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:29,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:29,037 INFO L87 Difference]: Start difference. First operand 5723 states and 19065 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:29,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:29,320 INFO L93 Difference]: Finished difference Result 6305 states and 20268 transitions. [2021-05-03 14:05:29,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 14:05:29,320 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-05-03 14:05:29,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:29,328 INFO L225 Difference]: With dead ends: 6305 [2021-05-03 14:05:29,328 INFO L226 Difference]: Without dead ends: 6305 [2021-05-03 14:05:29,329 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 299.3ms TimeCoverageRelationStatistics Valid=471, Invalid=935, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 14:05:29,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6305 states. [2021-05-03 14:05:29,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6305 to 5812. [2021-05-03 14:05:29,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5812 states, 5811 states have (on average 3.3271381861985887) internal successors, (19334), 5811 states have internal predecessors, (19334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:29,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5812 states to 5812 states and 19334 transitions. [2021-05-03 14:05:29,401 INFO L78 Accepts]: Start accepts. Automaton has 5812 states and 19334 transitions. Word has length 20 [2021-05-03 14:05:29,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:29,401 INFO L480 AbstractCegarLoop]: Abstraction has 5812 states and 19334 transitions. [2021-05-03 14:05:29,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:29,401 INFO L276 IsEmpty]: Start isEmpty. Operand 5812 states and 19334 transitions. [2021-05-03 14:05:29,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:29,404 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:29,404 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:29,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3318 [2021-05-03 14:05:29,605 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:29,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:29,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1106701056, now seen corresponding path program 121 times [2021-05-03 14:05:29,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:29,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486129191] [2021-05-03 14:05:29,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:29,657 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:29,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486129191] [2021-05-03 14:05:29,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731224703] [2021-05-03 14:05:29,657 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 [2021-05-03 14:05:29,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:29,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:29,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:29,711 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:29,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:29,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:05:29,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901476225] [2021-05-03 14:05:29,711 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:05:29,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:29,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:05:29,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:05:29,712 INFO L87 Difference]: Start difference. First operand 5812 states and 19334 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) [2021-05-03 14:05:29,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:29,909 INFO L93 Difference]: Finished difference Result 6089 states and 19769 transitions. [2021-05-03 14:05:29,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:05:29,909 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 20 [2021-05-03 14:05:29,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:29,917 INFO L225 Difference]: With dead ends: 6089 [2021-05-03 14:05:29,917 INFO L226 Difference]: Without dead ends: 6085 [2021-05-03 14:05:29,918 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 132.3ms TimeCoverageRelationStatistics Valid=207, Invalid=393, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:05:29,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6085 states. [2021-05-03 14:05:29,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6085 to 5545. [2021-05-03 14:05:29,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5545 states, 5544 states have (on average 3.3145743145743145) internal successors, (18376), 5544 states have internal predecessors, (18376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:29,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5545 states to 5545 states and 18376 transitions. [2021-05-03 14:05:29,992 INFO L78 Accepts]: Start accepts. Automaton has 5545 states and 18376 transitions. Word has length 20 [2021-05-03 14:05:29,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:29,992 INFO L480 AbstractCegarLoop]: Abstraction has 5545 states and 18376 transitions. [2021-05-03 14:05:29,992 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) [2021-05-03 14:05:29,992 INFO L276 IsEmpty]: Start isEmpty. Operand 5545 states and 18376 transitions. [2021-05-03 14:05:29,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:29,996 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:29,996 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:30,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3319,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:30,197 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:30,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:30,197 INFO L82 PathProgramCache]: Analyzing trace with hash 92516544, now seen corresponding path program 122 times [2021-05-03 14:05:30,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:30,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723136605] [2021-05-03 14:05:30,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:30,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:30,261 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723136605] [2021-05-03 14:05:30,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484730844] [2021-05-03 14:05:30,262 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 [2021-05-03 14:05:30,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:30,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:30,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:30,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:30,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:30,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:05:30,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972973857] [2021-05-03 14:05:30,335 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:30,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:30,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:30,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:30,336 INFO L87 Difference]: Start difference. First operand 5545 states and 18376 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) [2021-05-03 14:05:30,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:30,551 INFO L93 Difference]: Finished difference Result 7476 states and 23877 transitions. [2021-05-03 14:05:30,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:05:30,551 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 [2021-05-03 14:05:30,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:30,564 INFO L225 Difference]: With dead ends: 7476 [2021-05-03 14:05:30,564 INFO L226 Difference]: Without dead ends: 7476 [2021-05-03 14:05:30,564 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 175.9ms TimeCoverageRelationStatistics Valid=277, Invalid=535, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:05:30,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7476 states. [2021-05-03 14:05:30,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7476 to 6757. [2021-05-03 14:05:30,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6757 states, 6756 states have (on average 3.312314979277679) internal successors, (22378), 6756 states have internal predecessors, (22378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:30,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6757 states to 6757 states and 22378 transitions. [2021-05-03 14:05:30,670 INFO L78 Accepts]: Start accepts. Automaton has 6757 states and 22378 transitions. Word has length 20 [2021-05-03 14:05:30,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:30,670 INFO L480 AbstractCegarLoop]: Abstraction has 6757 states and 22378 transitions. [2021-05-03 14:05:30,670 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) [2021-05-03 14:05:30,670 INFO L276 IsEmpty]: Start isEmpty. Operand 6757 states and 22378 transitions. [2021-05-03 14:05:30,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:30,675 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:30,675 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:30,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3320 [2021-05-03 14:05:30,875 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:30,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:30,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1174940634, now seen corresponding path program 123 times [2021-05-03 14:05:30,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:30,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147128172] [2021-05-03 14:05:30,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:30,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:30,933 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:30,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147128172] [2021-05-03 14:05:30,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41842072] [2021-05-03 14:05:30,933 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 [2021-05-03 14:05:30,952 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:05:30,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:30,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:30,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:30,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:30,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:30,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716563179] [2021-05-03 14:05:30,997 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:30,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:30,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:30,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:30,998 INFO L87 Difference]: Start difference. First operand 6757 states and 22378 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:31,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:31,215 INFO L93 Difference]: Finished difference Result 7967 states and 25615 transitions. [2021-05-03 14:05:31,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:05:31,215 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-05-03 14:05:31,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:31,227 INFO L225 Difference]: With dead ends: 7967 [2021-05-03 14:05:31,227 INFO L226 Difference]: Without dead ends: 7967 [2021-05-03 14:05:31,227 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 185.3ms TimeCoverageRelationStatistics Valid=282, Invalid=530, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:05:31,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7967 states. [2021-05-03 14:05:31,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7967 to 5441. [2021-05-03 14:05:31,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5441 states, 5440 states have (on average 3.2928308823529413) internal successors, (17913), 5440 states have internal predecessors, (17913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:31,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5441 states to 5441 states and 17913 transitions. [2021-05-03 14:05:31,328 INFO L78 Accepts]: Start accepts. Automaton has 5441 states and 17913 transitions. Word has length 20 [2021-05-03 14:05:31,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:31,328 INFO L480 AbstractCegarLoop]: Abstraction has 5441 states and 17913 transitions. [2021-05-03 14:05:31,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:31,328 INFO L276 IsEmpty]: Start isEmpty. Operand 5441 states and 17913 transitions. [2021-05-03 14:05:31,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:31,332 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:31,332 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:31,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3321,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:31,533 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:31,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:31,535 INFO L82 PathProgramCache]: Analyzing trace with hash 308194304, now seen corresponding path program 124 times [2021-05-03 14:05:31,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:31,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968987013] [2021-05-03 14:05:31,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:31,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:31,611 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:31,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968987013] [2021-05-03 14:05:31,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20240608] [2021-05-03 14:05:31,613 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) [2021-05-03 14:05:31,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:31,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:31,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:31,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:31,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:31,705 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:31,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990358402] [2021-05-03 14:05:31,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:31,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:31,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:31,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:31,709 INFO L87 Difference]: Start difference. First operand 5441 states and 17913 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:32,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:32,046 INFO L93 Difference]: Finished difference Result 6867 states and 21677 transitions. [2021-05-03 14:05:32,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-03 14:05:32,047 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-05-03 14:05:32,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:32,060 INFO L225 Difference]: With dead ends: 6867 [2021-05-03 14:05:32,061 INFO L226 Difference]: Without dead ends: 6867 [2021-05-03 14:05:32,063 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 272.5ms TimeCoverageRelationStatistics Valid=404, Invalid=786, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:05:32,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6867 states. [2021-05-03 14:05:32,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6867 to 5507. [2021-05-03 14:05:32,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5507 states, 5506 states have (on average 3.2944061024337086) internal successors, (18139), 5506 states have internal predecessors, (18139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:32,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5507 states to 5507 states and 18139 transitions. [2021-05-03 14:05:32,172 INFO L78 Accepts]: Start accepts. Automaton has 5507 states and 18139 transitions. Word has length 20 [2021-05-03 14:05:32,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:32,172 INFO L480 AbstractCegarLoop]: Abstraction has 5507 states and 18139 transitions. [2021-05-03 14:05:32,172 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:32,172 INFO L276 IsEmpty]: Start isEmpty. Operand 5507 states and 18139 transitions. [2021-05-03 14:05:32,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:32,176 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:32,176 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:32,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3322,126 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:32,378 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:32,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:32,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1811407488, now seen corresponding path program 125 times [2021-05-03 14:05:32,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:32,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153917815] [2021-05-03 14:05:32,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:32,437 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:32,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153917815] [2021-05-03 14:05:32,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820439689] [2021-05-03 14:05:32,437 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 [2021-05-03 14:05:32,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-03 14:05:32,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:32,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:32,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:32,504 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:32,504 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:32,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:32,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686609083] [2021-05-03 14:05:32,504 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:32,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:32,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:32,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:32,505 INFO L87 Difference]: Start difference. First operand 5507 states and 18139 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:32,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:32,674 INFO L93 Difference]: Finished difference Result 6222 states and 19873 transitions. [2021-05-03 14:05:32,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:05:32,674 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-05-03 14:05:32,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:32,684 INFO L225 Difference]: With dead ends: 6222 [2021-05-03 14:05:32,684 INFO L226 Difference]: Without dead ends: 6222 [2021-05-03 14:05:32,684 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 151.3ms TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:05:32,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6222 states. [2021-05-03 14:05:32,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6222 to 5437. [2021-05-03 14:05:32,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5437 states, 5436 states have (on average 3.3015084621044886) internal successors, (17947), 5436 states have internal predecessors, (17947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:32,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5437 states to 5437 states and 17947 transitions. [2021-05-03 14:05:32,768 INFO L78 Accepts]: Start accepts. Automaton has 5437 states and 17947 transitions. Word has length 20 [2021-05-03 14:05:32,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:32,768 INFO L480 AbstractCegarLoop]: Abstraction has 5437 states and 17947 transitions. [2021-05-03 14:05:32,768 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:32,768 INFO L276 IsEmpty]: Start isEmpty. Operand 5437 states and 17947 transitions. [2021-05-03 14:05:32,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:32,772 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:32,772 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:32,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3323,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:32,973 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:32,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:32,973 INFO L82 PathProgramCache]: Analyzing trace with hash -328272550, now seen corresponding path program 126 times [2021-05-03 14:05:32,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:32,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413083116] [2021-05-03 14:05:32,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:33,062 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:33,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413083116] [2021-05-03 14:05:33,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238293134] [2021-05-03 14:05:33,062 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 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 [2021-05-03 14:05:33,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-03 14:05:33,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:33,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:33,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:33,128 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:33,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:33,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:33,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467276376] [2021-05-03 14:05:33,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:33,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:33,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:33,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:33,129 INFO L87 Difference]: Start difference. First operand 5437 states and 17947 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:33,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:33,349 INFO L93 Difference]: Finished difference Result 5885 states and 18864 transitions. [2021-05-03 14:05:33,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:05:33,349 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-05-03 14:05:33,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:33,357 INFO L225 Difference]: With dead ends: 5885 [2021-05-03 14:05:33,357 INFO L226 Difference]: Without dead ends: 5885 [2021-05-03 14:05:33,358 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 205.3ms TimeCoverageRelationStatistics Valid=305, Invalid=625, Unknown=0, NotChecked=0, Total=930 [2021-05-03 14:05:33,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5885 states. [2021-05-03 14:05:33,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5885 to 5474. [2021-05-03 14:05:33,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5474 states, 5473 states have (on average 3.3012972775443084) internal successors, (18068), 5473 states have internal predecessors, (18068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:33,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5474 states to 5474 states and 18068 transitions. [2021-05-03 14:05:33,436 INFO L78 Accepts]: Start accepts. Automaton has 5474 states and 18068 transitions. Word has length 20 [2021-05-03 14:05:33,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:33,436 INFO L480 AbstractCegarLoop]: Abstraction has 5474 states and 18068 transitions. [2021-05-03 14:05:33,436 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:33,437 INFO L276 IsEmpty]: Start isEmpty. Operand 5474 states and 18068 transitions. [2021-05-03 14:05:33,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:33,441 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:33,441 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:33,641 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3324,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:33,642 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:33,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:33,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1595729728, now seen corresponding path program 127 times [2021-05-03 14:05:33,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:33,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510033] [2021-05-03 14:05:33,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:33,730 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:33,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510033] [2021-05-03 14:05:33,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343639156] [2021-05-03 14:05:33,731 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 [2021-05-03 14:05:33,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:33,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:33,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:33,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:33,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:33,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831932898] [2021-05-03 14:05:33,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:33,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:33,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:33,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:33,800 INFO L87 Difference]: Start difference. First operand 5474 states and 18068 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:34,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:34,116 INFO L93 Difference]: Finished difference Result 6017 states and 19173 transitions. [2021-05-03 14:05:34,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 14:05:34,117 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-05-03 14:05:34,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:34,124 INFO L225 Difference]: With dead ends: 6017 [2021-05-03 14:05:34,125 INFO L226 Difference]: Without dead ends: 6017 [2021-05-03 14:05:34,125 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 284.9ms TimeCoverageRelationStatistics Valid=470, Invalid=936, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 14:05:34,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6017 states. [2021-05-03 14:05:34,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6017 to 5473. [2021-05-03 14:05:34,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5473 states, 5472 states have (on average 3.30171783625731) internal successors, (18067), 5472 states have internal predecessors, (18067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:34,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5473 states to 5473 states and 18067 transitions. [2021-05-03 14:05:34,197 INFO L78 Accepts]: Start accepts. Automaton has 5473 states and 18067 transitions. Word has length 20 [2021-05-03 14:05:34,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:34,197 INFO L480 AbstractCegarLoop]: Abstraction has 5473 states and 18067 transitions. [2021-05-03 14:05:34,197 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:34,197 INFO L276 IsEmpty]: Start isEmpty. Operand 5473 states and 18067 transitions. [2021-05-03 14:05:34,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:34,201 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:34,201 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:34,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3325,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:34,402 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:34,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:34,402 INFO L82 PathProgramCache]: Analyzing trace with hash 2112133432, now seen corresponding path program 128 times [2021-05-03 14:05:34,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:34,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073337133] [2021-05-03 14:05:34,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:34,482 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:34,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073337133] [2021-05-03 14:05:34,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414482668] [2021-05-03 14:05:34,483 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 [2021-05-03 14:05:34,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:34,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:34,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:34,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:34,544 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:34,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:34,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:05:34,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114577635] [2021-05-03 14:05:34,544 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:05:34,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:34,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:05:34,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:05:34,545 INFO L87 Difference]: Start difference. First operand 5473 states and 18067 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) [2021-05-03 14:05:34,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:34,702 INFO L93 Difference]: Finished difference Result 5764 states and 18581 transitions. [2021-05-03 14:05:34,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:05:34,703 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 [2021-05-03 14:05:34,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:34,711 INFO L225 Difference]: With dead ends: 5764 [2021-05-03 14:05:34,712 INFO L226 Difference]: Without dead ends: 5760 [2021-05-03 14:05:34,712 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 117.9ms TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:05:34,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5760 states. [2021-05-03 14:05:34,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5760 to 5552. [2021-05-03 14:05:34,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5552 states, 5551 states have (on average 3.301747432894974) internal successors, (18328), 5551 states have internal predecessors, (18328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:34,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5552 states to 5552 states and 18328 transitions. [2021-05-03 14:05:34,790 INFO L78 Accepts]: Start accepts. Automaton has 5552 states and 18328 transitions. Word has length 20 [2021-05-03 14:05:34,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:34,790 INFO L480 AbstractCegarLoop]: Abstraction has 5552 states and 18328 transitions. [2021-05-03 14:05:34,790 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) [2021-05-03 14:05:34,790 INFO L276 IsEmpty]: Start isEmpty. Operand 5552 states and 18328 transitions. [2021-05-03 14:05:34,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:34,794 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:34,794 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:35,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3326,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:35,003 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:35,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:35,003 INFO L82 PathProgramCache]: Analyzing trace with hash -603612954, now seen corresponding path program 129 times [2021-05-03 14:05:35,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:35,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411014209] [2021-05-03 14:05:35,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:35,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:35,058 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:35,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411014209] [2021-05-03 14:05:35,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125715491] [2021-05-03 14:05:35,059 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 [2021-05-03 14:05:35,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:05:35,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:35,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:35,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:35,117 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 12 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:35,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:35,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:05:35,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374382943] [2021-05-03 14:05:35,118 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:05:35,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:35,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:05:35,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:05:35,118 INFO L87 Difference]: Start difference. First operand 5552 states and 18328 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) [2021-05-03 14:05:35,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:35,210 INFO L93 Difference]: Finished difference Result 5872 states and 18869 transitions. [2021-05-03 14:05:35,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:05:35,211 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 [2021-05-03 14:05:35,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:35,219 INFO L225 Difference]: With dead ends: 5872 [2021-05-03 14:05:35,219 INFO L226 Difference]: Without dead ends: 5872 [2021-05-03 14:05:35,219 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:05:35,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5872 states. [2021-05-03 14:05:35,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5872 to 5560. [2021-05-03 14:05:35,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5560 states, 5559 states have (on average 3.300593631948192) internal successors, (18348), 5559 states have internal predecessors, (18348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:35,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5560 states to 5560 states and 18348 transitions. [2021-05-03 14:05:35,308 INFO L78 Accepts]: Start accepts. Automaton has 5560 states and 18348 transitions. Word has length 20 [2021-05-03 14:05:35,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:35,308 INFO L480 AbstractCegarLoop]: Abstraction has 5560 states and 18348 transitions. [2021-05-03 14:05:35,308 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) [2021-05-03 14:05:35,308 INFO L276 IsEmpty]: Start isEmpty. Operand 5560 states and 18348 transitions. [2021-05-03 14:05:35,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:35,312 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:35,312 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:35,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3327,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:35,513 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:35,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:35,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1962307008, now seen corresponding path program 130 times [2021-05-03 14:05:35,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:35,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834161265] [2021-05-03 14:05:35,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:35,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:35,569 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:35,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834161265] [2021-05-03 14:05:35,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177234541] [2021-05-03 14:05:35,569 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 [2021-05-03 14:05:35,588 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:35,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:35,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:35,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:35,634 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 11 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:35,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:35,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:05:35,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551037956] [2021-05-03 14:05:35,635 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:35,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:35,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:35,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:35,635 INFO L87 Difference]: Start difference. First operand 5560 states and 18348 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) [2021-05-03 14:05:35,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:35,752 INFO L93 Difference]: Finished difference Result 5951 states and 19077 transitions. [2021-05-03 14:05:35,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:05:35,752 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 [2021-05-03 14:05:35,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:35,761 INFO L225 Difference]: With dead ends: 5951 [2021-05-03 14:05:35,761 INFO L226 Difference]: Without dead ends: 5951 [2021-05-03 14:05:35,761 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:05:35,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5951 states. [2021-05-03 14:05:35,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5951 to 5587. [2021-05-03 14:05:35,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5587 states, 5586 states have (on average 3.2986036519871105) internal successors, (18426), 5586 states have internal predecessors, (18426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:35,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5587 states to 5587 states and 18426 transitions. [2021-05-03 14:05:35,841 INFO L78 Accepts]: Start accepts. Automaton has 5587 states and 18426 transitions. Word has length 20 [2021-05-03 14:05:35,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:35,841 INFO L480 AbstractCegarLoop]: Abstraction has 5587 states and 18426 transitions. [2021-05-03 14:05:35,841 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) [2021-05-03 14:05:35,842 INFO L276 IsEmpty]: Start isEmpty. Operand 5587 states and 18426 transitions. [2021-05-03 14:05:35,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:35,846 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:35,846 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:36,046 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3328,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:36,046 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:36,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:36,047 INFO L82 PathProgramCache]: Analyzing trace with hash -98552794, now seen corresponding path program 131 times [2021-05-03 14:05:36,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:36,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94732162] [2021-05-03 14:05:36,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:36,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:36,102 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:36,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94732162] [2021-05-03 14:05:36,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901522718] [2021-05-03 14:05:36,103 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 [2021-05-03 14:05:36,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:05:36,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:36,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:36,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:36,166 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:36,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:36,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:05:36,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422086682] [2021-05-03 14:05:36,167 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:36,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:36,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:36,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:36,167 INFO L87 Difference]: Start difference. First operand 5587 states and 18426 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) [2021-05-03 14:05:36,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:36,278 INFO L93 Difference]: Finished difference Result 7442 states and 23969 transitions. [2021-05-03 14:05:36,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:05:36,279 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 [2021-05-03 14:05:36,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:36,292 INFO L225 Difference]: With dead ends: 7442 [2021-05-03 14:05:36,292 INFO L226 Difference]: Without dead ends: 7442 [2021-05-03 14:05:36,292 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=136, Invalid=244, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:05:36,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7442 states. [2021-05-03 14:05:36,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7442 to 7001. [2021-05-03 14:05:36,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7001 states, 7000 states have (on average 3.3085714285714287) internal successors, (23160), 7000 states have internal predecessors, (23160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:36,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7001 states to 7001 states and 23160 transitions. [2021-05-03 14:05:36,399 INFO L78 Accepts]: Start accepts. Automaton has 7001 states and 23160 transitions. Word has length 20 [2021-05-03 14:05:36,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:36,399 INFO L480 AbstractCegarLoop]: Abstraction has 7001 states and 23160 transitions. [2021-05-03 14:05:36,399 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) [2021-05-03 14:05:36,399 INFO L276 IsEmpty]: Start isEmpty. Operand 7001 states and 23160 transitions. [2021-05-03 14:05:36,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:36,404 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:36,404 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:36,604 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3329 [2021-05-03 14:05:36,604 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:36,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:36,605 INFO L82 PathProgramCache]: Analyzing trace with hash 439302784, now seen corresponding path program 132 times [2021-05-03 14:05:36,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:36,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117687003] [2021-05-03 14:05:36,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:36,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:36,660 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:36,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117687003] [2021-05-03 14:05:36,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631584450] [2021-05-03 14:05:36,660 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 [2021-05-03 14:05:36,680 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:05:36,680 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:36,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:36,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:36,724 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:36,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:36,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:05:36,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151367492] [2021-05-03 14:05:36,725 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:36,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:36,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:36,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:36,725 INFO L87 Difference]: Start difference. First operand 7001 states and 23160 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) [2021-05-03 14:05:36,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:36,838 INFO L93 Difference]: Finished difference Result 7460 states and 24267 transitions. [2021-05-03 14:05:36,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-03 14:05:36,839 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 [2021-05-03 14:05:36,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:36,851 INFO L225 Difference]: With dead ends: 7460 [2021-05-03 14:05:36,851 INFO L226 Difference]: Without dead ends: 7460 [2021-05-03 14:05:36,852 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:36,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7460 states. [2021-05-03 14:05:36,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7460 to 7283. [2021-05-03 14:05:36,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7283 states, 7282 states have (on average 3.300466904696512) internal successors, (24034), 7282 states have internal predecessors, (24034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:36,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7283 states to 7283 states and 24034 transitions. [2021-05-03 14:05:36,962 INFO L78 Accepts]: Start accepts. Automaton has 7283 states and 24034 transitions. Word has length 20 [2021-05-03 14:05:36,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:36,962 INFO L480 AbstractCegarLoop]: Abstraction has 7283 states and 24034 transitions. [2021-05-03 14:05:36,962 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) [2021-05-03 14:05:36,962 INFO L276 IsEmpty]: Start isEmpty. Operand 7283 states and 24034 transitions. [2021-05-03 14:05:36,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:36,967 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:36,967 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:37,167 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3330 [2021-05-03 14:05:37,168 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:37,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:37,168 INFO L82 PathProgramCache]: Analyzing trace with hash -67043482, now seen corresponding path program 133 times [2021-05-03 14:05:37,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:37,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606717309] [2021-05-03 14:05:37,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:37,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:37,240 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:37,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606717309] [2021-05-03 14:05:37,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021586870] [2021-05-03 14:05:37,241 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 [2021-05-03 14:05:37,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:37,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:37,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:37,303 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:37,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:37,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:37,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354141323] [2021-05-03 14:05:37,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:37,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:37,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:37,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:37,304 INFO L87 Difference]: Start difference. First operand 7283 states and 24034 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:37,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:37,442 INFO L93 Difference]: Finished difference Result 7550 states and 24471 transitions. [2021-05-03 14:05:37,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:05:37,443 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-05-03 14:05:37,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:37,453 INFO L225 Difference]: With dead ends: 7550 [2021-05-03 14:05:37,453 INFO L226 Difference]: Without dead ends: 7550 [2021-05-03 14:05:37,453 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 129.1ms TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:05:37,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7550 states. [2021-05-03 14:05:37,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7550 to 7283. [2021-05-03 14:05:37,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7283 states, 7282 states have (on average 3.3001922548750344) internal successors, (24032), 7282 states have internal predecessors, (24032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:37,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7283 states to 7283 states and 24032 transitions. [2021-05-03 14:05:37,554 INFO L78 Accepts]: Start accepts. Automaton has 7283 states and 24032 transitions. Word has length 20 [2021-05-03 14:05:37,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:37,554 INFO L480 AbstractCegarLoop]: Abstraction has 7283 states and 24032 transitions. [2021-05-03 14:05:37,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:37,554 INFO L276 IsEmpty]: Start isEmpty. Operand 7283 states and 24032 transitions. [2021-05-03 14:05:37,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:37,559 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:37,559 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:37,759 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3331 [2021-05-03 14:05:37,759 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:37,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:37,760 INFO L82 PathProgramCache]: Analyzing trace with hash 1416091456, now seen corresponding path program 134 times [2021-05-03 14:05:37,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:37,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838723772] [2021-05-03 14:05:37,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:37,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:37,824 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:37,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838723772] [2021-05-03 14:05:37,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099686790] [2021-05-03 14:05:37,825 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 [2021-05-03 14:05:37,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:37,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:37,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:37,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:37,891 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:37,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:37,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:37,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031144974] [2021-05-03 14:05:37,892 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:37,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:37,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:37,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:37,892 INFO L87 Difference]: Start difference. First operand 7283 states and 24032 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:38,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:38,064 INFO L93 Difference]: Finished difference Result 7595 states and 24674 transitions. [2021-05-03 14:05:38,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:05:38,064 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-05-03 14:05:38,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:38,076 INFO L225 Difference]: With dead ends: 7595 [2021-05-03 14:05:38,077 INFO L226 Difference]: Without dead ends: 7595 [2021-05-03 14:05:38,077 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 155.1ms TimeCoverageRelationStatistics Valid=223, Invalid=479, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:05:38,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7595 states. [2021-05-03 14:05:38,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7595 to 7376. [2021-05-03 14:05:38,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7376 states, 7375 states have (on average 3.296677966101695) internal successors, (24313), 7375 states have internal predecessors, (24313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:38,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7376 states to 7376 states and 24313 transitions. [2021-05-03 14:05:38,181 INFO L78 Accepts]: Start accepts. Automaton has 7376 states and 24313 transitions. Word has length 20 [2021-05-03 14:05:38,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:38,181 INFO L480 AbstractCegarLoop]: Abstraction has 7376 states and 24313 transitions. [2021-05-03 14:05:38,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:38,181 INFO L276 IsEmpty]: Start isEmpty. Operand 7376 states and 24313 transitions. [2021-05-03 14:05:38,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:38,186 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:38,186 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:38,386 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3332,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:38,386 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:38,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:38,386 INFO L82 PathProgramCache]: Analyzing trace with hash 148634278, now seen corresponding path program 135 times [2021-05-03 14:05:38,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:38,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277230847] [2021-05-03 14:05:38,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:38,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:38,462 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:38,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277230847] [2021-05-03 14:05:38,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671976363] [2021-05-03 14:05:38,463 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) [2021-05-03 14:05:38,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:05:38,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:38,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:38,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:38,547 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:38,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:38,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:38,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398075723] [2021-05-03 14:05:38,547 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:38,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:38,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:38,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:38,548 INFO L87 Difference]: Start difference. First operand 7376 states and 24313 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:38,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:38,791 INFO L93 Difference]: Finished difference Result 7693 states and 24913 transitions. [2021-05-03 14:05:38,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:05:38,792 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-05-03 14:05:38,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:38,803 INFO L225 Difference]: With dead ends: 7693 [2021-05-03 14:05:38,803 INFO L226 Difference]: Without dead ends: 7693 [2021-05-03 14:05:38,803 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 224.0ms TimeCoverageRelationStatistics Valid=343, Invalid=713, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:05:38,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7693 states. [2021-05-03 14:05:38,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7693 to 7412. [2021-05-03 14:05:38,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7412 states, 7411 states have (on average 3.295236810147079) internal successors, (24421), 7411 states have internal predecessors, (24421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:38,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7412 states to 7412 states and 24421 transitions. [2021-05-03 14:05:38,907 INFO L78 Accepts]: Start accepts. Automaton has 7412 states and 24421 transitions. Word has length 20 [2021-05-03 14:05:38,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:38,907 INFO L480 AbstractCegarLoop]: Abstraction has 7412 states and 24421 transitions. [2021-05-03 14:05:38,907 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:38,907 INFO L276 IsEmpty]: Start isEmpty. Operand 7412 states and 24421 transitions. [2021-05-03 14:05:38,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:38,912 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:38,912 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:39,112 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3333,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:39,112 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:39,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:39,112 INFO L82 PathProgramCache]: Analyzing trace with hash -487832576, now seen corresponding path program 136 times [2021-05-03 14:05:39,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:39,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118169749] [2021-05-03 14:05:39,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:39,184 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:39,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118169749] [2021-05-03 14:05:39,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048218973] [2021-05-03 14:05:39,184 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 [2021-05-03 14:05:39,202 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:39,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:39,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:39,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:39,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:39,251 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:39,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543066119] [2021-05-03 14:05:39,251 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:39,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:39,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:39,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:39,252 INFO L87 Difference]: Start difference. First operand 7412 states and 24421 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:39,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:39,572 INFO L93 Difference]: Finished difference Result 7927 states and 25571 transitions. [2021-05-03 14:05:39,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-03 14:05:39,572 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) Word has length 20 [2021-05-03 14:05:39,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:39,583 INFO L225 Difference]: With dead ends: 7927 [2021-05-03 14:05:39,583 INFO L226 Difference]: Without dead ends: 7927 [2021-05-03 14:05:39,584 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 283.1ms TimeCoverageRelationStatistics Valid=469, Invalid=937, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 14:05:39,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7927 states. [2021-05-03 14:05:39,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7927 to 7453. [2021-05-03 14:05:39,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7453 states, 7452 states have (on average 3.293612453032743) internal successors, (24544), 7452 states have internal predecessors, (24544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:39,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7453 states to 7453 states and 24544 transitions. [2021-05-03 14:05:39,694 INFO L78 Accepts]: Start accepts. Automaton has 7453 states and 24544 transitions. Word has length 20 [2021-05-03 14:05:39,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:39,695 INFO L480 AbstractCegarLoop]: Abstraction has 7453 states and 24544 transitions. [2021-05-03 14:05:39,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 1.5333333333333334) 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) [2021-05-03 14:05:39,695 INFO L276 IsEmpty]: Start isEmpty. Operand 7453 states and 24544 transitions. [2021-05-03 14:05:39,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:39,700 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:39,700 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:39,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3334 [2021-05-03 14:05:39,901 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:39,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:39,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1164507080, now seen corresponding path program 137 times [2021-05-03 14:05:39,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:39,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348866062] [2021-05-03 14:05:39,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:39,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:39,974 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:39,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348866062] [2021-05-03 14:05:39,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661777291] [2021-05-03 14:05:39,975 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 [2021-05-03 14:05:39,995 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:05:39,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:39,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:39,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:40,029 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:40,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:40,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:05:40,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868644157] [2021-05-03 14:05:40,030 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:40,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:40,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:40,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:40,030 INFO L87 Difference]: Start difference. First operand 7453 states and 24544 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) [2021-05-03 14:05:40,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:40,258 INFO L93 Difference]: Finished difference Result 7682 states and 24832 transitions. [2021-05-03 14:05:40,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-03 14:05:40,259 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 20 [2021-05-03 14:05:40,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:40,269 INFO L225 Difference]: With dead ends: 7682 [2021-05-03 14:05:40,269 INFO L226 Difference]: Without dead ends: 7678 [2021-05-03 14:05:40,269 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 178.2ms TimeCoverageRelationStatistics Valid=242, Invalid=460, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:05:40,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7678 states. [2021-05-03 14:05:40,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7678 to 7414. [2021-05-03 14:05:40,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7414 states, 7413 states have (on average 3.2917847025495752) internal successors, (24402), 7413 states have internal predecessors, (24402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:40,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7414 states to 7414 states and 24402 transitions. [2021-05-03 14:05:40,376 INFO L78 Accepts]: Start accepts. Automaton has 7414 states and 24402 transitions. Word has length 20 [2021-05-03 14:05:40,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:40,376 INFO L480 AbstractCegarLoop]: Abstraction has 7414 states and 24402 transitions. [2021-05-03 14:05:40,376 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) [2021-05-03 14:05:40,376 INFO L276 IsEmpty]: Start isEmpty. Operand 7414 states and 24402 transitions. [2021-05-03 14:05:40,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:40,381 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:40,381 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:40,581 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3335,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:40,581 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:40,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:40,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1963013832, now seen corresponding path program 138 times [2021-05-03 14:05:40,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:40,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597511855] [2021-05-03 14:05:40,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:40,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:40,652 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:40,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597511855] [2021-05-03 14:05:40,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457253666] [2021-05-03 14:05:40,652 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 [2021-05-03 14:05:40,672 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:05:40,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:40,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:40,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:40,718 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:40,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:40,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:40,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287912427] [2021-05-03 14:05:40,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:40,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:40,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:40,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:40,719 INFO L87 Difference]: Start difference. First operand 7414 states and 24402 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) [2021-05-03 14:05:41,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:41,001 INFO L93 Difference]: Finished difference Result 9451 states and 30109 transitions. [2021-05-03 14:05:41,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-03 14:05:41,002 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 20 [2021-05-03 14:05:41,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:41,017 INFO L225 Difference]: With dead ends: 9451 [2021-05-03 14:05:41,017 INFO L226 Difference]: Without dead ends: 9451 [2021-05-03 14:05:41,017 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 238.5ms TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:05:41,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9451 states. [2021-05-03 14:05:41,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9451 to 7875. [2021-05-03 14:05:41,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7875 states, 7874 states have (on average 3.276987553975108) internal successors, (25803), 7874 states have internal predecessors, (25803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:41,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7875 states to 7875 states and 25803 transitions. [2021-05-03 14:05:41,146 INFO L78 Accepts]: Start accepts. Automaton has 7875 states and 25803 transitions. Word has length 20 [2021-05-03 14:05:41,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:41,146 INFO L480 AbstractCegarLoop]: Abstraction has 7875 states and 25803 transitions. [2021-05-03 14:05:41,146 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) [2021-05-03 14:05:41,146 INFO L276 IsEmpty]: Start isEmpty. Operand 7875 states and 25803 transitions. [2021-05-03 14:05:41,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:41,151 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:41,151 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:41,352 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3336,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:41,353 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:41,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:41,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1695486610, now seen corresponding path program 139 times [2021-05-03 14:05:41,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:41,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395435738] [2021-05-03 14:05:41,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:41,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:41,422 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:41,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395435738] [2021-05-03 14:05:41,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738701340] [2021-05-03 14:05:41,422 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 [2021-05-03 14:05:41,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:41,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:41,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:41,488 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:41,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:41,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:41,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357296852] [2021-05-03 14:05:41,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:41,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:41,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:41,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:41,489 INFO L87 Difference]: Start difference. First operand 7875 states and 25803 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) [2021-05-03 14:05:41,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:41,739 INFO L93 Difference]: Finished difference Result 8447 states and 27068 transitions. [2021-05-03 14:05:41,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:05:41,739 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 20 [2021-05-03 14:05:41,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:41,753 INFO L225 Difference]: With dead ends: 8447 [2021-05-03 14:05:41,753 INFO L226 Difference]: Without dead ends: 8447 [2021-05-03 14:05:41,753 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 218.5ms TimeCoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:05:41,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8447 states. [2021-05-03 14:05:41,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8447 to 7839. [2021-05-03 14:05:41,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7839 states, 7838 states have (on average 3.280556264353151) internal successors, (25713), 7838 states have internal predecessors, (25713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:41,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7839 states to 7839 states and 25713 transitions. [2021-05-03 14:05:41,893 INFO L78 Accepts]: Start accepts. Automaton has 7839 states and 25713 transitions. Word has length 20 [2021-05-03 14:05:41,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:41,893 INFO L480 AbstractCegarLoop]: Abstraction has 7839 states and 25713 transitions. [2021-05-03 14:05:41,893 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) [2021-05-03 14:05:41,894 INFO L276 IsEmpty]: Start isEmpty. Operand 7839 states and 25713 transitions. [2021-05-03 14:05:41,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:41,898 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:41,898 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:42,099 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3337,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:42,099 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:42,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:42,099 INFO L82 PathProgramCache]: Analyzing trace with hash 428029432, now seen corresponding path program 140 times [2021-05-03 14:05:42,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:42,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676226029] [2021-05-03 14:05:42,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:42,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:42,186 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:42,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676226029] [2021-05-03 14:05:42,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119322132] [2021-05-03 14:05:42,186 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 [2021-05-03 14:05:42,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:42,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:42,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:42,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:42,262 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:42,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:42,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:42,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698193997] [2021-05-03 14:05:42,263 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:42,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:42,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:42,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:42,264 INFO L87 Difference]: Start difference. First operand 7839 states and 25713 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) [2021-05-03 14:05:42,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:42,625 INFO L93 Difference]: Finished difference Result 8546 states and 27359 transitions. [2021-05-03 14:05:42,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-03 14:05:42,626 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 20 [2021-05-03 14:05:42,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:42,638 INFO L225 Difference]: With dead ends: 8546 [2021-05-03 14:05:42,639 INFO L226 Difference]: Without dead ends: 8546 [2021-05-03 14:05:42,639 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 306.2ms TimeCoverageRelationStatistics Valid=469, Invalid=937, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 14:05:42,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8546 states. [2021-05-03 14:05:42,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8546 to 7853. [2021-05-03 14:05:42,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7853 states, 7852 states have (on average 3.281074885379521) internal successors, (25763), 7852 states have internal predecessors, (25763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:42,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7853 states to 7853 states and 25763 transitions. [2021-05-03 14:05:42,760 INFO L78 Accepts]: Start accepts. Automaton has 7853 states and 25763 transitions. Word has length 20 [2021-05-03 14:05:42,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:42,760 INFO L480 AbstractCegarLoop]: Abstraction has 7853 states and 25763 transitions. [2021-05-03 14:05:42,761 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) [2021-05-03 14:05:42,761 INFO L276 IsEmpty]: Start isEmpty. Operand 7853 states and 25763 transitions. [2021-05-03 14:05:42,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:42,766 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:42,766 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:42,966 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3338 [2021-05-03 14:05:42,967 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:42,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:42,967 INFO L82 PathProgramCache]: Analyzing trace with hash -855116680, now seen corresponding path program 141 times [2021-05-03 14:05:42,967 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:42,967 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496633441] [2021-05-03 14:05:42,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:42,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:43,066 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:43,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496633441] [2021-05-03 14:05:43,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351694208] [2021-05-03 14:05:43,067 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 [2021-05-03 14:05:43,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:05:43,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:43,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:43,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:43,131 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:43,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:43,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:43,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899198976] [2021-05-03 14:05:43,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:43,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:43,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:43,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:43,132 INFO L87 Difference]: Start difference. First operand 7853 states and 25763 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) [2021-05-03 14:05:43,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:43,353 INFO L93 Difference]: Finished difference Result 8149 states and 26291 transitions. [2021-05-03 14:05:43,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:05:43,353 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 20 [2021-05-03 14:05:43,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:43,366 INFO L225 Difference]: With dead ends: 8149 [2021-05-03 14:05:43,366 INFO L226 Difference]: Without dead ends: 8149 [2021-05-03 14:05:43,366 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 201.8ms TimeCoverageRelationStatistics Valid=294, Invalid=576, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:05:43,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8149 states. [2021-05-03 14:05:43,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8149 to 7829. [2021-05-03 14:05:43,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7829 states, 7828 states have (on average 3.281936637710782) internal successors, (25691), 7828 states have internal predecessors, (25691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:43,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7829 states to 7829 states and 25691 transitions. [2021-05-03 14:05:43,480 INFO L78 Accepts]: Start accepts. Automaton has 7829 states and 25691 transitions. Word has length 20 [2021-05-03 14:05:43,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:43,480 INFO L480 AbstractCegarLoop]: Abstraction has 7829 states and 25691 transitions. [2021-05-03 14:05:43,480 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) [2021-05-03 14:05:43,480 INFO L276 IsEmpty]: Start isEmpty. Operand 7829 states and 25691 transitions. [2021-05-03 14:05:43,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:43,485 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:43,485 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:43,685 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3339 [2021-05-03 14:05:43,685 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:43,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:43,686 INFO L82 PathProgramCache]: Analyzing trace with hash -2122573858, now seen corresponding path program 142 times [2021-05-03 14:05:43,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:43,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280063217] [2021-05-03 14:05:43,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:43,761 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:43,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280063217] [2021-05-03 14:05:43,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843520248] [2021-05-03 14:05:43,761 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 [2021-05-03 14:05:43,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:43,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:43,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:43,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:43,825 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:43,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:43,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:43,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124496675] [2021-05-03 14:05:43,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:43,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:43,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:43,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:43,826 INFO L87 Difference]: Start difference. First operand 7829 states and 25691 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) [2021-05-03 14:05:44,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:44,086 INFO L93 Difference]: Finished difference Result 8079 states and 26147 transitions. [2021-05-03 14:05:44,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:05:44,087 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 20 [2021-05-03 14:05:44,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:44,099 INFO L225 Difference]: With dead ends: 8079 [2021-05-03 14:05:44,099 INFO L226 Difference]: Without dead ends: 8079 [2021-05-03 14:05:44,099 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 220.7ms TimeCoverageRelationStatistics Valid=342, Invalid=714, Unknown=0, NotChecked=0, Total=1056 [2021-05-03 14:05:44,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8079 states. [2021-05-03 14:05:44,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8079 to 7824. [2021-05-03 14:05:44,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7824 states, 7823 states have (on average 3.2821168349737952) internal successors, (25676), 7823 states have internal predecessors, (25676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:44,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7824 states to 7824 states and 25676 transitions. [2021-05-03 14:05:44,263 INFO L78 Accepts]: Start accepts. Automaton has 7824 states and 25676 transitions. Word has length 20 [2021-05-03 14:05:44,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:44,263 INFO L480 AbstractCegarLoop]: Abstraction has 7824 states and 25676 transitions. [2021-05-03 14:05:44,264 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) [2021-05-03 14:05:44,264 INFO L276 IsEmpty]: Start isEmpty. Operand 7824 states and 25676 transitions. [2021-05-03 14:05:44,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:44,269 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:44,269 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:44,469 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3340 [2021-05-03 14:05:44,469 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:44,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:44,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1535926584, now seen corresponding path program 143 times [2021-05-03 14:05:44,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:44,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561720485] [2021-05-03 14:05:44,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:44,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:44,545 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:44,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561720485] [2021-05-03 14:05:44,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408041930] [2021-05-03 14:05:44,545 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 [2021-05-03 14:05:44,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:05:44,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:44,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:44,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:44,611 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:44,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:44,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:44,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882190255] [2021-05-03 14:05:44,611 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:44,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:44,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:44,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:44,612 INFO L87 Difference]: Start difference. First operand 7824 states and 25676 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) [2021-05-03 14:05:44,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:44,926 INFO L93 Difference]: Finished difference Result 8238 states and 26604 transitions. [2021-05-03 14:05:44,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-03 14:05:44,926 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 20 [2021-05-03 14:05:44,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:44,939 INFO L225 Difference]: With dead ends: 8238 [2021-05-03 14:05:44,939 INFO L226 Difference]: Without dead ends: 8238 [2021-05-03 14:05:44,939 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 277.0ms TimeCoverageRelationStatistics Valid=468, Invalid=938, Unknown=0, NotChecked=0, Total=1406 [2021-05-03 14:05:44,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8238 states. [2021-05-03 14:05:45,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8238 to 7821. [2021-05-03 14:05:45,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7821 states, 7820 states have (on average 3.282225063938619) internal successors, (25667), 7820 states have internal predecessors, (25667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:45,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7821 states to 7821 states and 25667 transitions. [2021-05-03 14:05:45,051 INFO L78 Accepts]: Start accepts. Automaton has 7821 states and 25667 transitions. Word has length 20 [2021-05-03 14:05:45,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:45,051 INFO L480 AbstractCegarLoop]: Abstraction has 7821 states and 25667 transitions. [2021-05-03 14:05:45,051 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) [2021-05-03 14:05:45,051 INFO L276 IsEmpty]: Start isEmpty. Operand 7821 states and 25667 transitions. [2021-05-03 14:05:45,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:45,056 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:45,057 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:45,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3341 [2021-05-03 14:05:45,260 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:45,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:45,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1918365366, now seen corresponding path program 144 times [2021-05-03 14:05:45,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:45,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475595517] [2021-05-03 14:05:45,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:45,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:45,315 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:45,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475595517] [2021-05-03 14:05:45,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113912771] [2021-05-03 14:05:45,315 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 [2021-05-03 14:05:45,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:05:45,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:45,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:45,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:45,369 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:45,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:45,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:05:45,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804024756] [2021-05-03 14:05:45,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:05:45,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:45,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:05:45,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:05:45,370 INFO L87 Difference]: Start difference. First operand 7821 states and 25667 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) [2021-05-03 14:05:45,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:45,550 INFO L93 Difference]: Finished difference Result 8648 states and 28004 transitions. [2021-05-03 14:05:45,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:05:45,551 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 20 [2021-05-03 14:05:45,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:45,563 INFO L225 Difference]: With dead ends: 8648 [2021-05-03 14:05:45,564 INFO L226 Difference]: Without dead ends: 8646 [2021-05-03 14:05:45,564 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 113.2ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:05:45,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8646 states. [2021-05-03 14:05:45,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8646 to 8471. [2021-05-03 14:05:45,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8471 states, 8470 states have (on average 3.282880755608028) internal successors, (27806), 8470 states have internal predecessors, (27806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:45,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8471 states to 8471 states and 27806 transitions. [2021-05-03 14:05:45,691 INFO L78 Accepts]: Start accepts. Automaton has 8471 states and 27806 transitions. Word has length 20 [2021-05-03 14:05:45,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:45,691 INFO L480 AbstractCegarLoop]: Abstraction has 8471 states and 27806 transitions. [2021-05-03 14:05:45,691 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) [2021-05-03 14:05:45,691 INFO L276 IsEmpty]: Start isEmpty. Operand 8471 states and 27806 transitions. [2021-05-03 14:05:45,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:45,697 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:45,697 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:45,898 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3342 [2021-05-03 14:05:45,899 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:45,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:45,899 INFO L82 PathProgramCache]: Analyzing trace with hash -339144456, now seen corresponding path program 145 times [2021-05-03 14:05:45,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:45,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862678022] [2021-05-03 14:05:45,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:45,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:45,953 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:45,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862678022] [2021-05-03 14:05:45,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129981551] [2021-05-03 14:05:45,953 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 [2021-05-03 14:05:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:45,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:45,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:46,009 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:46,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:46,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:05:46,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201681513] [2021-05-03 14:05:46,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:05:46,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:46,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:05:46,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:05:46,010 INFO L87 Difference]: Start difference. First operand 8471 states and 27806 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) [2021-05-03 14:05:46,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:46,111 INFO L93 Difference]: Finished difference Result 8734 states and 28233 transitions. [2021-05-03 14:05:46,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-03 14:05:46,112 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 20 [2021-05-03 14:05:46,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:46,124 INFO L225 Difference]: With dead ends: 8734 [2021-05-03 14:05:46,124 INFO L226 Difference]: Without dead ends: 8734 [2021-05-03 14:05:46,125 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 80.0ms TimeCoverageRelationStatistics Valid=120, Invalid=186, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:46,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8734 states. [2021-05-03 14:05:46,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8734 to 8472. [2021-05-03 14:05:46,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8472 states, 8471 states have (on average 3.282611261952544) internal successors, (27807), 8471 states have internal predecessors, (27807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:46,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8472 states to 8472 states and 27807 transitions. [2021-05-03 14:05:46,243 INFO L78 Accepts]: Start accepts. Automaton has 8472 states and 27807 transitions. Word has length 20 [2021-05-03 14:05:46,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:46,243 INFO L480 AbstractCegarLoop]: Abstraction has 8472 states and 27807 transitions. [2021-05-03 14:05:46,243 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) [2021-05-03 14:05:46,243 INFO L276 IsEmpty]: Start isEmpty. Operand 8472 states and 27807 transitions. [2021-05-03 14:05:46,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:46,248 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:46,249 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:46,449 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3343,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:46,449 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:46,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:46,449 INFO L82 PathProgramCache]: Analyzing trace with hash -2068191790, now seen corresponding path program 146 times [2021-05-03 14:05:46,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:46,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779313852] [2021-05-03 14:05:46,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:46,507 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:46,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779313852] [2021-05-03 14:05:46,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482870047] [2021-05-03 14:05:46,508 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 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 [2021-05-03 14:05:46,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:46,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:46,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:46,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:46,579 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:46,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:46,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:05:46,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680843263] [2021-05-03 14:05:46,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:46,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:46,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:46,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:46,580 INFO L87 Difference]: Start difference. First operand 8472 states and 27807 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) [2021-05-03 14:05:46,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:46,714 INFO L93 Difference]: Finished difference Result 8819 states and 28448 transitions. [2021-05-03 14:05:46,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:05:46,715 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 20 [2021-05-03 14:05:46,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:46,727 INFO L225 Difference]: With dead ends: 8819 [2021-05-03 14:05:46,727 INFO L226 Difference]: Without dead ends: 8819 [2021-05-03 14:05:46,727 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 113.4ms TimeCoverageRelationStatistics Valid=172, Invalid=290, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:05:46,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8819 states. [2021-05-03 14:05:46,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8819 to 8488. [2021-05-03 14:05:46,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8488 states, 8487 states have (on average 3.2818428184281845) internal successors, (27853), 8487 states have internal predecessors, (27853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:46,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8488 states to 8488 states and 27853 transitions. [2021-05-03 14:05:46,868 INFO L78 Accepts]: Start accepts. Automaton has 8488 states and 27853 transitions. Word has length 20 [2021-05-03 14:05:46,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:46,868 INFO L480 AbstractCegarLoop]: Abstraction has 8488 states and 27853 transitions. [2021-05-03 14:05:46,868 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) [2021-05-03 14:05:46,868 INFO L276 IsEmpty]: Start isEmpty. Operand 8488 states and 27853 transitions. [2021-05-03 14:05:46,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:46,873 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:46,873 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:47,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3344,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:47,074 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:47,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:47,074 INFO L82 PathProgramCache]: Analyzing trace with hash 165915704, now seen corresponding path program 147 times [2021-05-03 14:05:47,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:47,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302003470] [2021-05-03 14:05:47,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:47,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:47,133 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:47,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302003470] [2021-05-03 14:05:47,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864517348] [2021-05-03 14:05:47,133 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 [2021-05-03 14:05:47,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:05:47,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:47,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:47,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:47,202 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:47,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:47,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:05:47,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861358617] [2021-05-03 14:05:47,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:47,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:47,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:47,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:47,203 INFO L87 Difference]: Start difference. First operand 8488 states and 27853 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) [2021-05-03 14:05:47,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:47,346 INFO L93 Difference]: Finished difference Result 10243 states and 33004 transitions. [2021-05-03 14:05:47,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:05:47,346 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 20 [2021-05-03 14:05:47,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:47,362 INFO L225 Difference]: With dead ends: 10243 [2021-05-03 14:05:47,362 INFO L226 Difference]: Without dead ends: 10243 [2021-05-03 14:05:47,362 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 123.9ms TimeCoverageRelationStatistics Valid=181, Invalid=325, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:05:47,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10243 states. [2021-05-03 14:05:47,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10243 to 9399. [2021-05-03 14:05:47,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9399 states, 9398 states have (on average 3.282932538838051) internal successors, (30853), 9398 states have internal predecessors, (30853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:47,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9399 states to 9399 states and 30853 transitions. [2021-05-03 14:05:47,507 INFO L78 Accepts]: Start accepts. Automaton has 9399 states and 30853 transitions. Word has length 20 [2021-05-03 14:05:47,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:47,507 INFO L480 AbstractCegarLoop]: Abstraction has 9399 states and 30853 transitions. [2021-05-03 14:05:47,507 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) [2021-05-03 14:05:47,507 INFO L276 IsEmpty]: Start isEmpty. Operand 9399 states and 30853 transitions. [2021-05-03 14:05:47,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:47,512 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:47,512 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:47,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3345,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:47,713 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:47,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:47,713 INFO L82 PathProgramCache]: Analyzing trace with hash 703771282, now seen corresponding path program 148 times [2021-05-03 14:05:47,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:47,713 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230465554] [2021-05-03 14:05:47,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:47,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:47,771 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:47,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230465554] [2021-05-03 14:05:47,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038805822] [2021-05-03 14:05:47,772 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 [2021-05-03 14:05:47,791 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:47,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:47,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:47,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:47,861 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:47,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:47,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:05:47,861 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921148767] [2021-05-03 14:05:47,862 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:47,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:47,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:47,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:47,862 INFO L87 Difference]: Start difference. First operand 9399 states and 30853 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) [2021-05-03 14:05:48,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:48,007 INFO L93 Difference]: Finished difference Result 10149 states and 32809 transitions. [2021-05-03 14:05:48,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:05:48,008 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 20 [2021-05-03 14:05:48,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:48,025 INFO L225 Difference]: With dead ends: 10149 [2021-05-03 14:05:48,025 INFO L226 Difference]: Without dead ends: 10149 [2021-05-03 14:05:48,025 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 120.7ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:05:48,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10149 states. [2021-05-03 14:05:48,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10149 to 9884. [2021-05-03 14:05:48,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9884 states, 9883 states have (on average 3.274208236365476) internal successors, (32359), 9883 states have internal predecessors, (32359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:48,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9884 states to 9884 states and 32359 transitions. [2021-05-03 14:05:48,184 INFO L78 Accepts]: Start accepts. Automaton has 9884 states and 32359 transitions. Word has length 20 [2021-05-03 14:05:48,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:48,184 INFO L480 AbstractCegarLoop]: Abstraction has 9884 states and 32359 transitions. [2021-05-03 14:05:48,184 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) [2021-05-03 14:05:48,184 INFO L276 IsEmpty]: Start isEmpty. Operand 9884 states and 32359 transitions. [2021-05-03 14:05:48,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:48,190 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:48,190 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:48,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3346 [2021-05-03 14:05:48,392 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:48,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:48,392 INFO L82 PathProgramCache]: Analyzing trace with hash 197425016, now seen corresponding path program 149 times [2021-05-03 14:05:48,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:48,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414705361] [2021-05-03 14:05:48,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:48,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:48,493 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 3 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:48,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414705361] [2021-05-03 14:05:48,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359050168] [2021-05-03 14:05:48,493 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 [2021-05-03 14:05:48,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:05:48,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:48,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:48,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:48,558 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 5 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:48,558 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:48,558 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-05-03 14:05:48,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371555496] [2021-05-03 14:05:48,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:48,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:48,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:48,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:48,559 INFO L87 Difference]: Start difference. First operand 9884 states and 32359 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) [2021-05-03 14:05:48,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:48,665 INFO L93 Difference]: Finished difference Result 10072 states and 32751 transitions. [2021-05-03 14:05:48,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-03 14:05:48,665 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 20 [2021-05-03 14:05:48,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:48,683 INFO L225 Difference]: With dead ends: 10072 [2021-05-03 14:05:48,683 INFO L226 Difference]: Without dead ends: 10072 [2021-05-03 14:05:48,683 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 122.8ms TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2021-05-03 14:05:48,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10072 states. [2021-05-03 14:05:48,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10072 to 9967. [2021-05-03 14:05:48,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9967 states, 9966 states have (on average 3.2728276138872165) internal successors, (32617), 9966 states have internal predecessors, (32617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:48,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9967 states to 9967 states and 32617 transitions. [2021-05-03 14:05:48,837 INFO L78 Accepts]: Start accepts. Automaton has 9967 states and 32617 transitions. Word has length 20 [2021-05-03 14:05:48,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:48,837 INFO L480 AbstractCegarLoop]: Abstraction has 9967 states and 32617 transitions. [2021-05-03 14:05:48,837 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) [2021-05-03 14:05:48,837 INFO L276 IsEmpty]: Start isEmpty. Operand 9967 states and 32617 transitions. [2021-05-03 14:05:48,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:48,843 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:48,843 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:49,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3347,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:49,044 INFO L428 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:49,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:49,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1680559954, now seen corresponding path program 150 times [2021-05-03 14:05:49,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:49,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332425369] [2021-05-03 14:05:49,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:49,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:49,172 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:49,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332425369] [2021-05-03 14:05:49,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486132493] [2021-05-03 14:05:49,172 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 [2021-05-03 14:05:49,196 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:05:49,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:49,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:49,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:49,240 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:49,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:49,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:49,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782911336] [2021-05-03 14:05:49,241 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:49,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:49,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:49,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:49,241 INFO L87 Difference]: Start difference. First operand 9967 states and 32617 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) [2021-05-03 14:05:49,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:49,454 INFO L93 Difference]: Finished difference Result 10101 states and 32808 transitions. [2021-05-03 14:05:49,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:05:49,454 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 20 [2021-05-03 14:05:49,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:49,470 INFO L225 Difference]: With dead ends: 10101 [2021-05-03 14:05:49,470 INFO L226 Difference]: Without dead ends: 10101 [2021-05-03 14:05:49,470 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 173.0ms TimeCoverageRelationStatistics Valid=212, Invalid=438, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:05:49,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10101 states. [2021-05-03 14:05:49,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10101 to 9954. [2021-05-03 14:05:49,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9954 states, 9953 states have (on average 3.2730834924143473) internal successors, (32577), 9953 states have internal predecessors, (32577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:49,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9954 states to 9954 states and 32577 transitions. [2021-05-03 14:05:49,618 INFO L78 Accepts]: Start accepts. Automaton has 9954 states and 32577 transitions. Word has length 20 [2021-05-03 14:05:49,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:49,618 INFO L480 AbstractCegarLoop]: Abstraction has 9954 states and 32577 transitions. [2021-05-03 14:05:49,618 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) [2021-05-03 14:05:49,618 INFO L276 IsEmpty]: Start isEmpty. Operand 9954 states and 32577 transitions. [2021-05-03 14:05:49,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:49,624 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:49,624 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:49,824 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3348 [2021-05-03 14:05:49,825 INFO L428 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:49,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:49,825 INFO L82 PathProgramCache]: Analyzing trace with hash 413102776, now seen corresponding path program 151 times [2021-05-03 14:05:49,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:49,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649993123] [2021-05-03 14:05:49,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:49,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:49,893 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:49,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649993123] [2021-05-03 14:05:49,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582029216] [2021-05-03 14:05:49,893 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 [2021-05-03 14:05:49,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:49,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:49,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:49,957 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:49,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:49,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:49,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364342203] [2021-05-03 14:05:49,958 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:49,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:49,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:49,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:49,958 INFO L87 Difference]: Start difference. First operand 9954 states and 32577 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) [2021-05-03 14:05:50,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:50,162 INFO L93 Difference]: Finished difference Result 10116 states and 32868 transitions. [2021-05-03 14:05:50,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:05:50,163 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 20 [2021-05-03 14:05:50,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:50,177 INFO L225 Difference]: With dead ends: 10116 [2021-05-03 14:05:50,177 INFO L226 Difference]: Without dead ends: 10116 [2021-05-03 14:05:50,178 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 170.7ms TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:05:50,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10116 states. [2021-05-03 14:05:50,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10116 to 9959. [2021-05-03 14:05:50,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9959 states, 9958 states have (on average 3.272845953002611) internal successors, (32591), 9958 states have internal predecessors, (32591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:50,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9959 states to 9959 states and 32591 transitions. [2021-05-03 14:05:50,312 INFO L78 Accepts]: Start accepts. Automaton has 9959 states and 32591 transitions. Word has length 20 [2021-05-03 14:05:50,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:50,312 INFO L480 AbstractCegarLoop]: Abstraction has 9959 states and 32591 transitions. [2021-05-03 14:05:50,312 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) [2021-05-03 14:05:50,312 INFO L276 IsEmpty]: Start isEmpty. Operand 9959 states and 32591 transitions. [2021-05-03 14:05:50,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:50,318 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:50,318 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:50,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3349,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:50,519 INFO L428 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:50,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:50,519 INFO L82 PathProgramCache]: Analyzing trace with hash -223364078, now seen corresponding path program 152 times [2021-05-03 14:05:50,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:50,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601333405] [2021-05-03 14:05:50,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:50,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:50,594 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:50,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601333405] [2021-05-03 14:05:50,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12726983] [2021-05-03 14:05:50,595 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 [2021-05-03 14:05:50,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:50,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:50,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:50,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:50,669 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:50,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:50,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:50,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490892747] [2021-05-03 14:05:50,669 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:50,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:50,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:50,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:50,670 INFO L87 Difference]: Start difference. First operand 9959 states and 32591 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) [2021-05-03 14:05:50,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:50,907 INFO L93 Difference]: Finished difference Result 10234 states and 33185 transitions. [2021-05-03 14:05:50,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-03 14:05:50,907 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 20 [2021-05-03 14:05:50,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:50,922 INFO L225 Difference]: With dead ends: 10234 [2021-05-03 14:05:50,922 INFO L226 Difference]: Without dead ends: 10234 [2021-05-03 14:05:50,923 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 212.4ms TimeCoverageRelationStatistics Valid=324, Invalid=668, Unknown=0, NotChecked=0, Total=992 [2021-05-03 14:05:50,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10234 states. [2021-05-03 14:05:51,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10234 to 9965. [2021-05-03 14:05:51,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9965 states, 9964 states have (on average 3.2725812926535527) internal successors, (32608), 9964 states have internal predecessors, (32608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:51,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9965 states to 9965 states and 32608 transitions. [2021-05-03 14:05:51,059 INFO L78 Accepts]: Start accepts. Automaton has 9965 states and 32608 transitions. Word has length 20 [2021-05-03 14:05:51,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:51,060 INFO L480 AbstractCegarLoop]: Abstraction has 9965 states and 32608 transitions. [2021-05-03 14:05:51,060 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) [2021-05-03 14:05:51,060 INFO L276 IsEmpty]: Start isEmpty. Operand 9965 states and 32608 transitions. [2021-05-03 14:05:51,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-03 14:05:51,065 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:51,065 INFO L551 BasicCegarLoop]: trace histogram [8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:51,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3350,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:51,266 INFO L428 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:51,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:51,266 INFO L82 PathProgramCache]: Analyzing trace with hash 1520999928, now seen corresponding path program 153 times [2021-05-03 14:05:51,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:51,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128313852] [2021-05-03 14:05:51,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:51,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:51,399 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:51,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128313852] [2021-05-03 14:05:51,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511734784] [2021-05-03 14:05:51,399 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 [2021-05-03 14:05:51,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:05:51,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:51,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:51,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:51,468 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:51,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:51,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:51,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111779025] [2021-05-03 14:05:51,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:51,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:51,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:51,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:51,469 INFO L87 Difference]: Start difference. First operand 9965 states and 32608 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) [2021-05-03 14:05:51,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:51,771 INFO L93 Difference]: Finished difference Result 10435 states and 33779 transitions. [2021-05-03 14:05:51,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:05:51,772 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 20 [2021-05-03 14:05:51,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:51,789 INFO L225 Difference]: With dead ends: 10435 [2021-05-03 14:05:51,789 INFO L226 Difference]: Without dead ends: 10435 [2021-05-03 14:05:51,790 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 307.9ms TimeCoverageRelationStatistics Valid=404, Invalid=786, Unknown=0, NotChecked=0, Total=1190 [2021-05-03 14:05:51,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10435 states. [2021-05-03 14:05:51,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10435 to 9964. [2021-05-03 14:05:51,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9964 states, 9963 states have (on average 3.274114222623708) internal successors, (32620), 9963 states have internal predecessors, (32620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:51,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9964 states to 9964 states and 32620 transitions. [2021-05-03 14:05:51,967 INFO L78 Accepts]: Start accepts. Automaton has 9964 states and 32620 transitions. Word has length 20 [2021-05-03 14:05:51,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:51,967 INFO L480 AbstractCegarLoop]: Abstraction has 9964 states and 32620 transitions. [2021-05-03 14:05:51,967 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) [2021-05-03 14:05:51,967 INFO L276 IsEmpty]: Start isEmpty. Operand 9964 states and 32620 transitions. [2021-05-03 14:05:51,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:05:51,973 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:51,973 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:52,173 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3351 [2021-05-03 14:05:52,173 INFO L428 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:52,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:52,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1811260523, now seen corresponding path program 154 times [2021-05-03 14:05:52,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:52,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78532553] [2021-05-03 14:05:52,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:52,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:52,241 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:52,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78532553] [2021-05-03 14:05:52,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023596439] [2021-05-03 14:05:52,242 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 [2021-05-03 14:05:52,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:52,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:52,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:52,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:52,303 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:52,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:52,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-03 14:05:52,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595849933] [2021-05-03 14:05:52,304 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:52,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:52,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:52,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:52,304 INFO L87 Difference]: Start difference. First operand 9964 states and 32620 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) [2021-05-03 14:05:52,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:52,489 INFO L93 Difference]: Finished difference Result 10126 states and 32846 transitions. [2021-05-03 14:05:52,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:05:52,490 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 21 [2021-05-03 14:05:52,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:52,505 INFO L225 Difference]: With dead ends: 10126 [2021-05-03 14:05:52,505 INFO L226 Difference]: Without dead ends: 10123 [2021-05-03 14:05:52,505 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 134.9ms TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:05:52,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10123 states. [2021-05-03 14:05:52,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10123 to 9964. [2021-05-03 14:05:52,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9964 states, 9963 states have (on average 3.273511994379203) internal successors, (32614), 9963 states have internal predecessors, (32614), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:52,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9964 states to 9964 states and 32614 transitions. [2021-05-03 14:05:52,651 INFO L78 Accepts]: Start accepts. Automaton has 9964 states and 32614 transitions. Word has length 21 [2021-05-03 14:05:52,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:52,651 INFO L480 AbstractCegarLoop]: Abstraction has 9964 states and 32614 transitions. [2021-05-03 14:05:52,651 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) [2021-05-03 14:05:52,652 INFO L276 IsEmpty]: Start isEmpty. Operand 9964 states and 32614 transitions. [2021-05-03 14:05:52,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:05:52,657 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:52,657 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:52,858 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3352,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:52,858 INFO L428 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:52,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:52,858 INFO L82 PathProgramCache]: Analyzing trace with hash 738175143, now seen corresponding path program 155 times [2021-05-03 14:05:52,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:52,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374927709] [2021-05-03 14:05:52,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:52,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:52,924 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:52,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374927709] [2021-05-03 14:05:52,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718332327] [2021-05-03 14:05:52,924 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 [2021-05-03 14:05:52,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:05:52,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:52,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:05:52,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:52,987 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:52,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:52,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:52,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923345709] [2021-05-03 14:05:52,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:52,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:52,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:52,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:52,988 INFO L87 Difference]: Start difference. First operand 9964 states and 32614 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) [2021-05-03 14:05:53,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:53,206 INFO L93 Difference]: Finished difference Result 10176 states and 33094 transitions. [2021-05-03 14:05:53,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:05:53,207 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 21 [2021-05-03 14:05:53,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:53,229 INFO L225 Difference]: With dead ends: 10176 [2021-05-03 14:05:53,229 INFO L226 Difference]: Without dead ends: 10172 [2021-05-03 14:05:53,229 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:05:53,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10172 states. [2021-05-03 14:05:53,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10172 to 9964. [2021-05-03 14:05:53,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9964 states, 9963 states have (on average 3.2733112516310348) internal successors, (32612), 9963 states have internal predecessors, (32612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:53,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9964 states to 9964 states and 32612 transitions. [2021-05-03 14:05:53,431 INFO L78 Accepts]: Start accepts. Automaton has 9964 states and 32612 transitions. Word has length 21 [2021-05-03 14:05:53,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:53,431 INFO L480 AbstractCegarLoop]: Abstraction has 9964 states and 32612 transitions. [2021-05-03 14:05:53,431 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) [2021-05-03 14:05:53,431 INFO L276 IsEmpty]: Start isEmpty. Operand 9964 states and 32612 transitions. [2021-05-03 14:05:53,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:05:53,438 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:53,438 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:53,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3353 [2021-05-03 14:05:53,661 INFO L428 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:53,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:53,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1832266731, now seen corresponding path program 156 times [2021-05-03 14:05:53,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:53,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407817206] [2021-05-03 14:05:53,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:53,734 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:53,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407817206] [2021-05-03 14:05:53,734 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310975538] [2021-05-03 14:05:53,734 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 [2021-05-03 14:05:53,756 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:05:53,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:53,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:05:53,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:53,799 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:53,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:53,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:05:53,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805825384] [2021-05-03 14:05:53,799 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:53,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:53,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:53,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:53,800 INFO L87 Difference]: Start difference. First operand 9964 states and 32612 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) [2021-05-03 14:05:53,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:53,997 INFO L93 Difference]: Finished difference Result 10153 states and 33062 transitions. [2021-05-03 14:05:53,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:05:53,998 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 21 [2021-05-03 14:05:53,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:54,014 INFO L225 Difference]: With dead ends: 10153 [2021-05-03 14:05:54,014 INFO L226 Difference]: Without dead ends: 10148 [2021-05-03 14:05:54,014 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 142.6ms TimeCoverageRelationStatistics Valid=190, Invalid=410, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:05:54,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10148 states. [2021-05-03 14:05:54,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10148 to 9966. [2021-05-03 14:05:54,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9966 states, 9965 states have (on average 3.2727546412443553) internal successors, (32613), 9965 states have internal predecessors, (32613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:54,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9966 states to 9966 states and 32613 transitions. [2021-05-03 14:05:54,189 INFO L78 Accepts]: Start accepts. Automaton has 9966 states and 32613 transitions. Word has length 21 [2021-05-03 14:05:54,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:54,189 INFO L480 AbstractCegarLoop]: Abstraction has 9966 states and 32613 transitions. [2021-05-03 14:05:54,189 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) [2021-05-03 14:05:54,189 INFO L276 IsEmpty]: Start isEmpty. Operand 9966 states and 32613 transitions. [2021-05-03 14:05:54,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:05:54,195 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:54,195 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:54,395 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3354,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:54,396 INFO L428 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:54,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:54,396 INFO L82 PathProgramCache]: Analyzing trace with hash 469064323, now seen corresponding path program 157 times [2021-05-03 14:05:54,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:54,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162367047] [2021-05-03 14:05:54,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:54,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:54,452 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:54,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162367047] [2021-05-03 14:05:54,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173862972] [2021-05-03 14:05:54,452 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 [2021-05-03 14:05:54,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:54,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:05:54,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:54,514 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:05:54,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:54,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:05:54,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260466305] [2021-05-03 14:05:54,514 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:05:54,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:54,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:05:54,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:05:54,515 INFO L87 Difference]: Start difference. First operand 9966 states and 32613 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) [2021-05-03 14:05:54,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:54,619 INFO L93 Difference]: Finished difference Result 10154 states and 32869 transitions. [2021-05-03 14:05:54,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:05:54,620 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 21 [2021-05-03 14:05:54,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:54,637 INFO L225 Difference]: With dead ends: 10154 [2021-05-03 14:05:54,637 INFO L226 Difference]: Without dead ends: 10152 [2021-05-03 14:05:54,637 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 67.3ms TimeCoverageRelationStatistics Valid=100, Invalid=140, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:05:54,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10152 states. [2021-05-03 14:05:54,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10152 to 9957. [2021-05-03 14:05:54,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9957 states, 9956 states have (on average 3.2695861791884293) internal successors, (32552), 9956 states have internal predecessors, (32552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:54,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9957 states to 9957 states and 32552 transitions. [2021-05-03 14:05:54,796 INFO L78 Accepts]: Start accepts. Automaton has 9957 states and 32552 transitions. Word has length 21 [2021-05-03 14:05:54,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:54,796 INFO L480 AbstractCegarLoop]: Abstraction has 9957 states and 32552 transitions. [2021-05-03 14:05:54,796 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) [2021-05-03 14:05:54,797 INFO L276 IsEmpty]: Start isEmpty. Operand 9957 states and 32552 transitions. [2021-05-03 14:05:54,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:05:54,803 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:54,804 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:55,004 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3355,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:55,004 INFO L428 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:55,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:55,004 INFO L82 PathProgramCache]: Analyzing trace with hash -2085810663, now seen corresponding path program 158 times [2021-05-03 14:05:55,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:55,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674488220] [2021-05-03 14:05:55,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:55,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:55,062 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:55,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674488220] [2021-05-03 14:05:55,062 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342768685] [2021-05-03 14:05:55,062 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 [2021-05-03 14:05:55,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:55,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:55,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:55,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:55,122 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:05:55,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:55,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-05-03 14:05:55,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293602725] [2021-05-03 14:05:55,123 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:55,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:55,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:55,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:55,123 INFO L87 Difference]: Start difference. First operand 9957 states and 32552 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) [2021-05-03 14:05:55,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:55,256 INFO L93 Difference]: Finished difference Result 10120 states and 32729 transitions. [2021-05-03 14:05:55,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:05:55,257 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 21 [2021-05-03 14:05:55,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:55,272 INFO L225 Difference]: With dead ends: 10120 [2021-05-03 14:05:55,272 INFO L226 Difference]: Without dead ends: 10120 [2021-05-03 14:05:55,273 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:55,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10120 states. [2021-05-03 14:05:55,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10120 to 9951. [2021-05-03 14:05:55,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9951 states, 9950 states have (on average 3.2641206030150753) internal successors, (32478), 9950 states have internal predecessors, (32478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:55,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9951 states to 9951 states and 32478 transitions. [2021-05-03 14:05:55,418 INFO L78 Accepts]: Start accepts. Automaton has 9951 states and 32478 transitions. Word has length 21 [2021-05-03 14:05:55,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:55,418 INFO L480 AbstractCegarLoop]: Abstraction has 9951 states and 32478 transitions. [2021-05-03 14:05:55,418 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) [2021-05-03 14:05:55,418 INFO L276 IsEmpty]: Start isEmpty. Operand 9951 states and 32478 transitions. [2021-05-03 14:05:55,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:05:55,423 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:55,423 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:55,624 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3356,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:55,624 INFO L428 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:55,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:55,624 INFO L82 PathProgramCache]: Analyzing trace with hash -375197355, now seen corresponding path program 159 times [2021-05-03 14:05:55,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:55,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929876435] [2021-05-03 14:05:55,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:55,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:55,723 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:55,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929876435] [2021-05-03 14:05:55,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47539804] [2021-05-03 14:05:55,723 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 [2021-05-03 14:05:55,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:05:55,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:55,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:05:55,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:55,788 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:55,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:55,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:05:55,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735263063] [2021-05-03 14:05:55,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:05:55,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:55,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:05:55,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:05:55,788 INFO L87 Difference]: Start difference. First operand 9951 states and 32478 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) [2021-05-03 14:05:55,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:55,964 INFO L93 Difference]: Finished difference Result 10112 states and 32702 transitions. [2021-05-03 14:05:55,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:05:55,964 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 21 [2021-05-03 14:05:55,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:55,986 INFO L225 Difference]: With dead ends: 10112 [2021-05-03 14:05:55,986 INFO L226 Difference]: Without dead ends: 10109 [2021-05-03 14:05:55,986 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 132.6ms TimeCoverageRelationStatistics Valid=175, Invalid=331, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:05:55,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10109 states. [2021-05-03 14:05:56,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10109 to 9943. [2021-05-03 14:05:56,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9943 states, 9942 states have (on average 3.2572922953128143) internal successors, (32384), 9942 states have internal predecessors, (32384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:56,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9943 states to 9943 states and 32384 transitions. [2021-05-03 14:05:56,139 INFO L78 Accepts]: Start accepts. Automaton has 9943 states and 32384 transitions. Word has length 21 [2021-05-03 14:05:56,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:56,139 INFO L480 AbstractCegarLoop]: Abstraction has 9943 states and 32384 transitions. [2021-05-03 14:05:56,139 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) [2021-05-03 14:05:56,139 INFO L276 IsEmpty]: Start isEmpty. Operand 9943 states and 32384 transitions. [2021-05-03 14:05:56,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:05:56,145 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:56,145 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:56,345 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3357,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:56,345 INFO L428 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:56,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:56,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1114207641, now seen corresponding path program 160 times [2021-05-03 14:05:56,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:56,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118491250] [2021-05-03 14:05:56,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:56,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:56,417 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 19 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:56,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118491250] [2021-05-03 14:05:56,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884441747] [2021-05-03 14:05:56,418 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 [2021-05-03 14:05:56,437 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:05:56,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:56,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:56,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:56,472 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:56,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:56,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-05-03 14:05:56,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172077290] [2021-05-03 14:05:56,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:56,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:56,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:56,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:56,473 INFO L87 Difference]: Start difference. First operand 9943 states and 32384 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) [2021-05-03 14:05:56,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:56,664 INFO L93 Difference]: Finished difference Result 10108 states and 32615 transitions. [2021-05-03 14:05:56,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:05:56,665 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 21 [2021-05-03 14:05:56,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:56,681 INFO L225 Difference]: With dead ends: 10108 [2021-05-03 14:05:56,681 INFO L226 Difference]: Without dead ends: 10105 [2021-05-03 14:05:56,682 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=201, Invalid=399, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:05:56,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10105 states. [2021-05-03 14:05:56,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10105 to 9943. [2021-05-03 14:05:56,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9943 states, 9942 states have (on average 3.256588211627439) internal successors, (32377), 9942 states have internal predecessors, (32377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:56,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9943 states to 9943 states and 32377 transitions. [2021-05-03 14:05:56,867 INFO L78 Accepts]: Start accepts. Automaton has 9943 states and 32377 transitions. Word has length 21 [2021-05-03 14:05:56,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:56,867 INFO L480 AbstractCegarLoop]: Abstraction has 9943 states and 32377 transitions. [2021-05-03 14:05:56,867 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) [2021-05-03 14:05:56,867 INFO L276 IsEmpty]: Start isEmpty. Operand 9943 states and 32377 transitions. [2021-05-03 14:05:56,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:05:56,872 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:56,873 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:57,073 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3358,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:57,073 INFO L428 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:57,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:57,073 INFO L82 PathProgramCache]: Analyzing trace with hash 41122261, now seen corresponding path program 161 times [2021-05-03 14:05:57,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:57,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088394254] [2021-05-03 14:05:57,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:57,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:57,143 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:57,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088394254] [2021-05-03 14:05:57,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762231008] [2021-05-03 14:05:57,143 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 [2021-05-03 14:05:57,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:05:57,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:57,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:57,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:57,199 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:57,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:57,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-05-03 14:05:57,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351661472] [2021-05-03 14:05:57,200 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:57,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:57,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:57,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:57,200 INFO L87 Difference]: Start difference. First operand 9943 states and 32377 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) [2021-05-03 14:05:57,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:57,388 INFO L93 Difference]: Finished difference Result 10188 states and 32924 transitions. [2021-05-03 14:05:57,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:05:57,389 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 21 [2021-05-03 14:05:57,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:57,404 INFO L225 Difference]: With dead ends: 10188 [2021-05-03 14:05:57,404 INFO L226 Difference]: Without dead ends: 10184 [2021-05-03 14:05:57,404 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:05:57,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10184 states. [2021-05-03 14:05:57,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10184 to 9943. [2021-05-03 14:05:57,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9943 states, 9942 states have (on average 3.256487628243814) internal successors, (32376), 9942 states have internal predecessors, (32376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:57,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9943 states to 9943 states and 32376 transitions. [2021-05-03 14:05:57,549 INFO L78 Accepts]: Start accepts. Automaton has 9943 states and 32376 transitions. Word has length 21 [2021-05-03 14:05:57,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:57,549 INFO L480 AbstractCegarLoop]: Abstraction has 9943 states and 32376 transitions. [2021-05-03 14:05:57,549 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) [2021-05-03 14:05:57,549 INFO L276 IsEmpty]: Start isEmpty. Operand 9943 states and 32376 transitions. [2021-05-03 14:05:57,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:05:57,554 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:57,554 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:57,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3359,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:57,757 INFO L428 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:57,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:57,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1135213849, now seen corresponding path program 162 times [2021-05-03 14:05:57,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:57,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694105219] [2021-05-03 14:05:57,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:57,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:57,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694105219] [2021-05-03 14:05:57,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824660435] [2021-05-03 14:05:57,830 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 [2021-05-03 14:05:57,850 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:05:57,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:57,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:05:57,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:57,886 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:57,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:57,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:05:57,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078090149] [2021-05-03 14:05:57,886 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:57,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:57,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:57,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:57,887 INFO L87 Difference]: Start difference. First operand 9943 states and 32376 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) [2021-05-03 14:05:58,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:58,071 INFO L93 Difference]: Finished difference Result 10178 states and 32911 transitions. [2021-05-03 14:05:58,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:05:58,072 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 21 [2021-05-03 14:05:58,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:58,088 INFO L225 Difference]: With dead ends: 10178 [2021-05-03 14:05:58,088 INFO L226 Difference]: Without dead ends: 10173 [2021-05-03 14:05:58,088 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 132.0ms TimeCoverageRelationStatistics Valid=191, Invalid=409, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:05:58,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10173 states. [2021-05-03 14:05:58,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10173 to 9943. [2021-05-03 14:05:58,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9943 states, 9942 states have (on average 3.256387044860189) internal successors, (32375), 9942 states have internal predecessors, (32375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:58,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9943 states to 9943 states and 32375 transitions. [2021-05-03 14:05:58,237 INFO L78 Accepts]: Start accepts. Automaton has 9943 states and 32375 transitions. Word has length 21 [2021-05-03 14:05:58,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:58,237 INFO L480 AbstractCegarLoop]: Abstraction has 9943 states and 32375 transitions. [2021-05-03 14:05:58,237 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) [2021-05-03 14:05:58,237 INFO L276 IsEmpty]: Start isEmpty. Operand 9943 states and 32375 transitions. [2021-05-03 14:05:58,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:05:58,242 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:58,243 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:58,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3360 [2021-05-03 14:05:58,443 INFO L428 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:58,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:58,443 INFO L82 PathProgramCache]: Analyzing trace with hash 692314709, now seen corresponding path program 163 times [2021-05-03 14:05:58,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:58,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583315222] [2021-05-03 14:05:58,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:58,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:58,529 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:05:58,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583315222] [2021-05-03 14:05:58,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697009402] [2021-05-03 14:05:58,529 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 [2021-05-03 14:05:58,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:58,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:05:58,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:58,583 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:58,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:58,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-05-03 14:05:58,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808373212] [2021-05-03 14:05:58,583 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:05:58,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:58,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:05:58,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:05:58,583 INFO L87 Difference]: Start difference. First operand 9943 states and 32375 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) [2021-05-03 14:05:58,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:58,765 INFO L93 Difference]: Finished difference Result 10151 states and 32872 transitions. [2021-05-03 14:05:58,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:05:58,765 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 21 [2021-05-03 14:05:58,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:58,780 INFO L225 Difference]: With dead ends: 10151 [2021-05-03 14:05:58,780 INFO L226 Difference]: Without dead ends: 10145 [2021-05-03 14:05:58,781 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 138.4ms TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:05:58,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10145 states. [2021-05-03 14:05:58,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10145 to 9945. [2021-05-03 14:05:58,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9945 states, 9944 states have (on average 3.255832662912309) internal successors, (32376), 9944 states have internal predecessors, (32376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:58,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9945 states to 9945 states and 32376 transitions. [2021-05-03 14:05:58,926 INFO L78 Accepts]: Start accepts. Automaton has 9945 states and 32376 transitions. Word has length 21 [2021-05-03 14:05:58,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:58,926 INFO L480 AbstractCegarLoop]: Abstraction has 9945 states and 32376 transitions. [2021-05-03 14:05:58,926 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) [2021-05-03 14:05:58,926 INFO L276 IsEmpty]: Start isEmpty. Operand 9945 states and 32376 transitions. [2021-05-03 14:05:58,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:05:58,931 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:58,931 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:59,132 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3361 [2021-05-03 14:05:59,132 INFO L428 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:59,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:59,132 INFO L82 PathProgramCache]: Analyzing trace with hash -1359739827, now seen corresponding path program 164 times [2021-05-03 14:05:59,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:59,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382631817] [2021-05-03 14:05:59,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:59,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:59,184 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:05:59,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382631817] [2021-05-03 14:05:59,184 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990193939] [2021-05-03 14:05:59,184 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 [2021-05-03 14:05:59,204 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:05:59,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:59,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:05:59,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:59,246 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:05:59,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:59,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-05-03 14:05:59,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250597907] [2021-05-03 14:05:59,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-03 14:05:59,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:59,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-03 14:05:59,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-05-03 14:05:59,247 INFO L87 Difference]: Start difference. First operand 9945 states and 32376 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) [2021-05-03 14:05:59,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:05:59,371 INFO L93 Difference]: Finished difference Result 10106 states and 32713 transitions. [2021-05-03 14:05:59,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:05:59,372 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 21 [2021-05-03 14:05:59,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:05:59,388 INFO L225 Difference]: With dead ends: 10106 [2021-05-03 14:05:59,388 INFO L226 Difference]: Without dead ends: 10106 [2021-05-03 14:05:59,389 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2021-05-03 14:05:59,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10106 states. [2021-05-03 14:05:59,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10106 to 9975. [2021-05-03 14:05:59,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9975 states, 9974 states have (on average 3.2557649889713254) internal successors, (32473), 9974 states have internal predecessors, (32473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:05:59,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9975 states to 9975 states and 32473 transitions. [2021-05-03 14:05:59,571 INFO L78 Accepts]: Start accepts. Automaton has 9975 states and 32473 transitions. Word has length 21 [2021-05-03 14:05:59,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:05:59,571 INFO L480 AbstractCegarLoop]: Abstraction has 9975 states and 32473 transitions. [2021-05-03 14:05:59,571 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) [2021-05-03 14:05:59,571 INFO L276 IsEmpty]: Start isEmpty. Operand 9975 states and 32473 transitions. [2021-05-03 14:05:59,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:05:59,577 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:05:59,577 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:05:59,777 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3362,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:05:59,777 INFO L428 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:05:59,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:05:59,778 INFO L82 PathProgramCache]: Analyzing trace with hash 328108493, now seen corresponding path program 165 times [2021-05-03 14:05:59,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:05:59,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602288337] [2021-05-03 14:05:59,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:05:59,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:05:59,848 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:05:59,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602288337] [2021-05-03 14:05:59,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374621857] [2021-05-03 14:05:59,849 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 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 [2021-05-03 14:05:59,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:05:59,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:05:59,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:05:59,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:05:59,905 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:05:59,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:05:59,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:05:59,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743892377] [2021-05-03 14:05:59,905 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:05:59,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:05:59,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:05:59,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:05:59,906 INFO L87 Difference]: Start difference. First operand 9975 states and 32473 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) [2021-05-03 14:06:00,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:00,059 INFO L93 Difference]: Finished difference Result 10155 states and 32890 transitions. [2021-05-03 14:06:00,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:06:00,059 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 21 [2021-05-03 14:06:00,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:00,076 INFO L225 Difference]: With dead ends: 10155 [2021-05-03 14:06:00,076 INFO L226 Difference]: Without dead ends: 10151 [2021-05-03 14:06:00,077 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 100.1ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:06:00,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10151 states. [2021-05-03 14:06:00,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10151 to 9975. [2021-05-03 14:06:00,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9975 states, 9974 states have (on average 3.255564467615801) internal successors, (32471), 9974 states have internal predecessors, (32471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:00,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9975 states to 9975 states and 32471 transitions. [2021-05-03 14:06:00,224 INFO L78 Accepts]: Start accepts. Automaton has 9975 states and 32471 transitions. Word has length 21 [2021-05-03 14:06:00,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:00,224 INFO L480 AbstractCegarLoop]: Abstraction has 9975 states and 32471 transitions. [2021-05-03 14:06:00,224 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) [2021-05-03 14:06:00,225 INFO L276 IsEmpty]: Start isEmpty. Operand 9975 states and 32471 transitions. [2021-05-03 14:06:00,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:00,232 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:00,232 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:00,444 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3363 [2021-05-03 14:06:00,445 INFO L428 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:00,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:00,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1811243431, now seen corresponding path program 166 times [2021-05-03 14:06:00,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:00,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795956767] [2021-05-03 14:06:00,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:00,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:00,510 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:00,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795956767] [2021-05-03 14:06:00,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133025046] [2021-05-03 14:06:00,510 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 [2021-05-03 14:06:00,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:06:00,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:00,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:00,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:00,567 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:06:00,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:00,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-05-03 14:06:00,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593200058] [2021-05-03 14:06:00,567 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:06:00,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:00,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:06:00,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:06:00,568 INFO L87 Difference]: Start difference. First operand 9975 states and 32471 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) [2021-05-03 14:06:00,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:00,764 INFO L93 Difference]: Finished difference Result 10215 states and 32971 transitions. [2021-05-03 14:06:00,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:06:00,765 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 21 [2021-05-03 14:06:00,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:00,782 INFO L225 Difference]: With dead ends: 10215 [2021-05-03 14:06:00,783 INFO L226 Difference]: Without dead ends: 10211 [2021-05-03 14:06:00,783 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 118.5ms TimeCoverageRelationStatistics Valid=164, Invalid=342, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:06:00,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10211 states. [2021-05-03 14:06:00,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10211 to 9975. [2021-05-03 14:06:00,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9975 states, 9974 states have (on average 3.2551634249047523) internal successors, (32467), 9974 states have internal predecessors, (32467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:00,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9975 states to 9975 states and 32467 transitions. [2021-05-03 14:06:00,938 INFO L78 Accepts]: Start accepts. Automaton has 9975 states and 32467 transitions. Word has length 21 [2021-05-03 14:06:00,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:00,938 INFO L480 AbstractCegarLoop]: Abstraction has 9975 states and 32467 transitions. [2021-05-03 14:06:00,938 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) [2021-05-03 14:06:00,938 INFO L276 IsEmpty]: Start isEmpty. Operand 9975 states and 32467 transitions. [2021-05-03 14:06:00,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:00,945 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:00,945 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:01,145 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 168 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3364 [2021-05-03 14:06:01,145 INFO L428 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:01,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:01,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1389632277, now seen corresponding path program 167 times [2021-05-03 14:06:01,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:01,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729033676] [2021-05-03 14:06:01,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:01,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:01,213 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:01,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729033676] [2021-05-03 14:06:01,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262415288] [2021-05-03 14:06:01,213 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 [2021-05-03 14:06:01,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:06:01,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:01,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:06:01,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:01,288 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 24 proven. 33 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:01,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:01,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:06:01,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971217010] [2021-05-03 14:06:01,289 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:06:01,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:01,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:06:01,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:06:01,289 INFO L87 Difference]: Start difference. First operand 9975 states and 32467 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) [2021-05-03 14:06:01,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:01,527 INFO L93 Difference]: Finished difference Result 10242 states and 33109 transitions. [2021-05-03 14:06:01,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:06:01,527 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 21 [2021-05-03 14:06:01,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:01,544 INFO L225 Difference]: With dead ends: 10242 [2021-05-03 14:06:01,544 INFO L226 Difference]: Without dead ends: 10237 [2021-05-03 14:06:01,544 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 150.4ms TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:06:01,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10237 states. [2021-05-03 14:06:01,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10237 to 9984. [2021-05-03 14:06:01,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9984 states, 9983 states have (on average 3.254332365020535) internal successors, (32488), 9983 states have internal predecessors, (32488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:01,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9984 states to 9984 states and 32488 transitions. [2021-05-03 14:06:01,692 INFO L78 Accepts]: Start accepts. Automaton has 9984 states and 32488 transitions. Word has length 21 [2021-05-03 14:06:01,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:01,692 INFO L480 AbstractCegarLoop]: Abstraction has 9984 states and 32488 transitions. [2021-05-03 14:06:01,692 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) [2021-05-03 14:06:01,692 INFO L276 IsEmpty]: Start isEmpty. Operand 9984 states and 32488 transitions. [2021-05-03 14:06:01,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:01,698 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:01,698 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:01,899 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3365,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:01,899 INFO L428 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:01,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:01,899 INFO L82 PathProgramCache]: Analyzing trace with hash 543786253, now seen corresponding path program 168 times [2021-05-03 14:06:01,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:01,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232708517] [2021-05-03 14:06:01,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:01,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:01,978 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 18 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:01,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232708517] [2021-05-03 14:06:01,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658346132] [2021-05-03 14:06:01,978 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 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 [2021-05-03 14:06:02,000 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:06:02,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:02,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:06:02,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:02,036 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:02,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:02,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:06:02,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291117583] [2021-05-03 14:06:02,037 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:06:02,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:02,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:06:02,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:02,037 INFO L87 Difference]: Start difference. First operand 9984 states and 32488 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) [2021-05-03 14:06:02,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:02,224 INFO L93 Difference]: Finished difference Result 10254 states and 33040 transitions. [2021-05-03 14:06:02,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:06:02,225 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 21 [2021-05-03 14:06:02,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:02,243 INFO L225 Difference]: With dead ends: 10254 [2021-05-03 14:06:02,243 INFO L226 Difference]: Without dead ends: 10250 [2021-05-03 14:06:02,243 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:06:02,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10250 states. [2021-05-03 14:06:02,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10250 to 9984. [2021-05-03 14:06:02,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9984 states, 9983 states have (on average 3.253731343283582) internal successors, (32482), 9983 states have internal predecessors, (32482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:02,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9984 states to 9984 states and 32482 transitions. [2021-05-03 14:06:02,449 INFO L78 Accepts]: Start accepts. Automaton has 9984 states and 32482 transitions. Word has length 21 [2021-05-03 14:06:02,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:02,449 INFO L480 AbstractCegarLoop]: Abstraction has 9984 states and 32482 transitions. [2021-05-03 14:06:02,449 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) [2021-05-03 14:06:02,449 INFO L276 IsEmpty]: Start isEmpty. Operand 9984 states and 32482 transitions. [2021-05-03 14:06:02,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:02,455 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:02,455 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:02,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3366,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:02,655 INFO L428 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:02,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:02,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1637877841, now seen corresponding path program 169 times [2021-05-03 14:06:02,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:02,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232224526] [2021-05-03 14:06:02,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:02,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:02,732 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:02,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232224526] [2021-05-03 14:06:02,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507085103] [2021-05-03 14:06:02,732 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 [2021-05-03 14:06:02,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:02,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:02,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:02,789 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 27 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:02,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:02,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-05-03 14:06:02,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233238941] [2021-05-03 14:06:02,790 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:06:02,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:02,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:06:02,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:02,790 INFO L87 Difference]: Start difference. First operand 9984 states and 32482 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) [2021-05-03 14:06:02,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:02,993 INFO L93 Difference]: Finished difference Result 10346 states and 33347 transitions. [2021-05-03 14:06:02,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:06:02,994 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 21 [2021-05-03 14:06:02,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:03,011 INFO L225 Difference]: With dead ends: 10346 [2021-05-03 14:06:03,011 INFO L226 Difference]: Without dead ends: 10341 [2021-05-03 14:06:03,012 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 150.3ms TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:06:03,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10341 states. [2021-05-03 14:06:03,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10341 to 9986. [2021-05-03 14:06:03,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9986 states, 9985 states have (on average 3.25378067100651) internal successors, (32489), 9985 states have internal predecessors, (32489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:03,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9986 states to 9986 states and 32489 transitions. [2021-05-03 14:06:03,192 INFO L78 Accepts]: Start accepts. Automaton has 9986 states and 32489 transitions. Word has length 21 [2021-05-03 14:06:03,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:03,192 INFO L480 AbstractCegarLoop]: Abstraction has 9986 states and 32489 transitions. [2021-05-03 14:06:03,192 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) [2021-05-03 14:06:03,192 INFO L276 IsEmpty]: Start isEmpty. Operand 9986 states and 32489 transitions. [2021-05-03 14:06:03,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:03,198 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:03,198 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:03,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3367 [2021-05-03 14:06:03,398 INFO L428 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:03,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:03,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1194978701, now seen corresponding path program 170 times [2021-05-03 14:06:03,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:03,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027423631] [2021-05-03 14:06:03,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:03,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:03,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027423631] [2021-05-03 14:06:03,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1899326664] [2021-05-03 14:06:03,505 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 [2021-05-03 14:06:03,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:06:03,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:03,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:03,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:03,576 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:03,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:03,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-05-03 14:06:03,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807954372] [2021-05-03 14:06:03,576 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:06:03,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:03,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:06:03,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=150, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:03,577 INFO L87 Difference]: Start difference. First operand 9986 states and 32489 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) [2021-05-03 14:06:03,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:03,815 INFO L93 Difference]: Finished difference Result 10320 states and 33310 transitions. [2021-05-03 14:06:03,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:06:03,816 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 21 [2021-05-03 14:06:03,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:03,839 INFO L225 Difference]: With dead ends: 10320 [2021-05-03 14:06:03,840 INFO L226 Difference]: Without dead ends: 10314 [2021-05-03 14:06:03,840 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 195.9ms TimeCoverageRelationStatistics Valid=207, Invalid=443, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:06:03,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10314 states. [2021-05-03 14:06:04,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10314 to 9996. [2021-05-03 14:06:04,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9996 states, 9995 states have (on average 3.253126563281641) internal successors, (32515), 9995 states have internal predecessors, (32515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:04,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9996 states to 9996 states and 32515 transitions. [2021-05-03 14:06:04,044 INFO L78 Accepts]: Start accepts. Automaton has 9996 states and 32515 transitions. Word has length 21 [2021-05-03 14:06:04,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:04,044 INFO L480 AbstractCegarLoop]: Abstraction has 9996 states and 32515 transitions. [2021-05-03 14:06:04,044 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) [2021-05-03 14:06:04,044 INFO L276 IsEmpty]: Start isEmpty. Operand 9996 states and 32515 transitions. [2021-05-03 14:06:04,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:04,052 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:04,052 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:04,274 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3368,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:04,274 INFO L428 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:04,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:04,275 INFO L82 PathProgramCache]: Analyzing trace with hash 335261461, now seen corresponding path program 171 times [2021-05-03 14:06:04,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:04,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358309654] [2021-05-03 14:06:04,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:04,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:04,330 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:04,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358309654] [2021-05-03 14:06:04,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199917741] [2021-05-03 14:06:04,330 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 [2021-05-03 14:06:04,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:06:04,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:04,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:06:04,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:04,392 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:06:04,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:04,392 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:06:04,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759001334] [2021-05-03 14:06:04,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:06:04,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:04,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:06:04,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:06:04,393 INFO L87 Difference]: Start difference. First operand 9996 states and 32515 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) [2021-05-03 14:06:04,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:04,489 INFO L93 Difference]: Finished difference Result 10199 states and 32826 transitions. [2021-05-03 14:06:04,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:06:04,490 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 21 [2021-05-03 14:06:04,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:04,507 INFO L225 Difference]: With dead ends: 10199 [2021-05-03 14:06:04,507 INFO L226 Difference]: Without dead ends: 10199 [2021-05-03 14:06:04,507 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:04,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10199 states. [2021-05-03 14:06:04,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10199 to 10005. [2021-05-03 14:06:04,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 3.2531987205117954) internal successors, (32545), 10004 states have internal predecessors, (32545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:04,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 32545 transitions. [2021-05-03 14:06:04,656 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 32545 transitions. Word has length 21 [2021-05-03 14:06:04,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:04,656 INFO L480 AbstractCegarLoop]: Abstraction has 10005 states and 32545 transitions. [2021-05-03 14:06:04,656 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) [2021-05-03 14:06:04,656 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 32545 transitions. [2021-05-03 14:06:04,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:04,662 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:04,662 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:04,862 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3369,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:04,862 INFO L428 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:04,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:04,863 INFO L82 PathProgramCache]: Analyzing trace with hash 2075353771, now seen corresponding path program 172 times [2021-05-03 14:06:04,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:04,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088477637] [2021-05-03 14:06:04,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:04,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:04,924 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 27 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:04,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088477637] [2021-05-03 14:06:04,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887379293] [2021-05-03 14:06:04,924 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 [2021-05-03 14:06:04,943 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:06:04,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:04,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:04,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:04,984 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:06:04,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:04,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-05-03 14:06:04,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547630110] [2021-05-03 14:06:04,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:06:04,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:04,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:06:04,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:06:04,985 INFO L87 Difference]: Start difference. First operand 10005 states and 32545 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) [2021-05-03 14:06:05,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:05,093 INFO L93 Difference]: Finished difference Result 10191 states and 32796 transitions. [2021-05-03 14:06:05,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:06:05,093 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 21 [2021-05-03 14:06:05,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:05,110 INFO L225 Difference]: With dead ends: 10191 [2021-05-03 14:06:05,110 INFO L226 Difference]: Without dead ends: 10191 [2021-05-03 14:06:05,110 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-05-03 14:06:05,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10191 states. [2021-05-03 14:06:05,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10191 to 10005. [2021-05-03 14:06:05,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 3.251799280287885) internal successors, (32531), 10004 states have internal predecessors, (32531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:05,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 32531 transitions. [2021-05-03 14:06:05,270 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 32531 transitions. Word has length 21 [2021-05-03 14:06:05,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:05,270 INFO L480 AbstractCegarLoop]: Abstraction has 10005 states and 32531 transitions. [2021-05-03 14:06:05,271 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) [2021-05-03 14:06:05,271 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 32531 transitions. [2021-05-03 14:06:05,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:05,276 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:05,277 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:05,477 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3370,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:05,477 INFO L428 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:05,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:05,477 INFO L82 PathProgramCache]: Analyzing trace with hash -509000217, now seen corresponding path program 173 times [2021-05-03 14:06:05,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:05,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142500152] [2021-05-03 14:06:05,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:05,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:05,536 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:05,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142500152] [2021-05-03 14:06:05,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287498363] [2021-05-03 14:06:05,537 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 [2021-05-03 14:06:05,557 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:06:05,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:05,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:05,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:05,592 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:05,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:05,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-05-03 14:06:05,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993551472] [2021-05-03 14:06:05,592 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:06:05,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:05,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:06:05,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:06:05,593 INFO L87 Difference]: Start difference. First operand 10005 states and 32531 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) [2021-05-03 14:06:05,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:05,775 INFO L93 Difference]: Finished difference Result 10188 states and 32786 transitions. [2021-05-03 14:06:05,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:06:05,776 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 21 [2021-05-03 14:06:05,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:05,792 INFO L225 Difference]: With dead ends: 10188 [2021-05-03 14:06:05,792 INFO L226 Difference]: Without dead ends: 10186 [2021-05-03 14:06:05,792 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=176, Invalid=330, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:06:05,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10186 states. [2021-05-03 14:06:05,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10186 to 10005. [2021-05-03 14:06:05,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 3.249000399840064) internal successors, (32503), 10004 states have internal predecessors, (32503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:05,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 32503 transitions. [2021-05-03 14:06:05,965 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 32503 transitions. Word has length 21 [2021-05-03 14:06:05,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:05,966 INFO L480 AbstractCegarLoop]: Abstraction has 10005 states and 32503 transitions. [2021-05-03 14:06:05,966 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) [2021-05-03 14:06:05,966 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 32503 transitions. [2021-05-03 14:06:05,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:05,971 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:05,971 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:06,172 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3371 [2021-05-03 14:06:06,172 INFO L428 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:06,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:06,172 INFO L82 PathProgramCache]: Analyzing trace with hash 980404779, now seen corresponding path program 174 times [2021-05-03 14:06:06,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:06,173 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844082314] [2021-05-03 14:06:06,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:06,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:06,238 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:06,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844082314] [2021-05-03 14:06:06,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086912825] [2021-05-03 14:06:06,238 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 [2021-05-03 14:06:06,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:06:06,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:06,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:06:06,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:06,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:06,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:06:06,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769372717] [2021-05-03 14:06:06,301 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:06:06,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:06,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:06:06,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:06,301 INFO L87 Difference]: Start difference. First operand 10005 states and 32503 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) [2021-05-03 14:06:06,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:06,493 INFO L93 Difference]: Finished difference Result 10193 states and 32765 transitions. [2021-05-03 14:06:06,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:06:06,493 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 21 [2021-05-03 14:06:06,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:06,507 INFO L225 Difference]: With dead ends: 10193 [2021-05-03 14:06:06,507 INFO L226 Difference]: Without dead ends: 10190 [2021-05-03 14:06:06,507 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=202, Invalid=398, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:06:06,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10190 states. [2021-05-03 14:06:06,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10190 to 10005. [2021-05-03 14:06:06,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 3.2486005597760896) internal successors, (32499), 10004 states have internal predecessors, (32499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:06,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 32499 transitions. [2021-05-03 14:06:06,653 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 32499 transitions. Word has length 21 [2021-05-03 14:06:06,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:06,654 INFO L480 AbstractCegarLoop]: Abstraction has 10005 states and 32499 transitions. [2021-05-03 14:06:06,654 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) [2021-05-03 14:06:06,654 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 32499 transitions. [2021-05-03 14:06:06,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:06,659 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:06,660 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:06,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3372 [2021-05-03 14:06:06,860 INFO L428 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:06,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:06,860 INFO L82 PathProgramCache]: Analyzing trace with hash -92680601, now seen corresponding path program 175 times [2021-05-03 14:06:06,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:06,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807309606] [2021-05-03 14:06:06,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:06,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:06,933 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 20 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:06,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807309606] [2021-05-03 14:06:06,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1455907299] [2021-05-03 14:06:06,933 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 [2021-05-03 14:06:06,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:06,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:06,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:06,995 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 27 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:06,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:06,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-03 14:06:06,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736037841] [2021-05-03 14:06:06,995 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:06,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:06,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:06,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:06,996 INFO L87 Difference]: Start difference. First operand 10005 states and 32499 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) [2021-05-03 14:06:07,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:07,223 INFO L93 Difference]: Finished difference Result 10199 states and 32771 transitions. [2021-05-03 14:06:07,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:06:07,223 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 21 [2021-05-03 14:06:07,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:07,241 INFO L225 Difference]: With dead ends: 10199 [2021-05-03 14:06:07,241 INFO L226 Difference]: Without dead ends: 10195 [2021-05-03 14:06:07,241 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 148.9ms TimeCoverageRelationStatistics Valid=231, Invalid=471, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:06:07,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10195 states. [2021-05-03 14:06:07,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10195 to 10005. [2021-05-03 14:06:07,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10005 states, 10004 states have (on average 3.248200719712115) internal successors, (32495), 10004 states have internal predecessors, (32495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:07,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10005 states to 10005 states and 32495 transitions. [2021-05-03 14:06:07,399 INFO L78 Accepts]: Start accepts. Automaton has 10005 states and 32495 transitions. Word has length 21 [2021-05-03 14:06:07,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:07,399 INFO L480 AbstractCegarLoop]: Abstraction has 10005 states and 32495 transitions. [2021-05-03 14:06:07,399 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) [2021-05-03 14:06:07,399 INFO L276 IsEmpty]: Start isEmpty. Operand 10005 states and 32495 transitions. [2021-05-03 14:06:07,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:07,406 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:07,406 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:07,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3373 [2021-05-03 14:06:07,606 INFO L428 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:07,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:07,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1001410987, now seen corresponding path program 176 times [2021-05-03 14:06:07,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:07,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870183984] [2021-05-03 14:06:07,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:07,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:07,679 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:07,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870183984] [2021-05-03 14:06:07,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366669985] [2021-05-03 14:06:07,679 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 [2021-05-03 14:06:07,699 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:06:07,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:07,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:07,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:07,743 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:07,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:07,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-03 14:06:07,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484992631] [2021-05-03 14:06:07,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:07,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:07,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:07,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:07,744 INFO L87 Difference]: Start difference. First operand 10005 states and 32495 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) [2021-05-03 14:06:07,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:07,971 INFO L93 Difference]: Finished difference Result 10440 states and 33536 transitions. [2021-05-03 14:06:07,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:06:07,971 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 21 [2021-05-03 14:06:07,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:07,987 INFO L225 Difference]: With dead ends: 10440 [2021-05-03 14:06:07,987 INFO L226 Difference]: Without dead ends: 10435 [2021-05-03 14:06:07,987 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 156.8ms TimeCoverageRelationStatistics Valid=243, Invalid=513, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:06:07,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10435 states. [2021-05-03 14:06:08,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10435 to 10008. [2021-05-03 14:06:08,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10008 states, 10007 states have (on average 3.2482262416308583) internal successors, (32505), 10007 states have internal predecessors, (32505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:08,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10008 states to 10008 states and 32505 transitions. [2021-05-03 14:06:08,142 INFO L78 Accepts]: Start accepts. Automaton has 10008 states and 32505 transitions. Word has length 21 [2021-05-03 14:06:08,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:08,142 INFO L480 AbstractCegarLoop]: Abstraction has 10008 states and 32505 transitions. [2021-05-03 14:06:08,142 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) [2021-05-03 14:06:08,142 INFO L276 IsEmpty]: Start isEmpty. Operand 10008 states and 32505 transitions. [2021-05-03 14:06:08,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:08,148 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:08,148 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:08,348 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3374 [2021-05-03 14:06:08,348 INFO L428 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:08,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:08,349 INFO L82 PathProgramCache]: Analyzing trace with hash 558511847, now seen corresponding path program 177 times [2021-05-03 14:06:08,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:08,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789779860] [2021-05-03 14:06:08,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:08,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:08,423 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:08,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789779860] [2021-05-03 14:06:08,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5448884] [2021-05-03 14:06:08,424 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 [2021-05-03 14:06:08,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:06:08,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:08,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:06:08,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:08,487 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:08,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:08,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:06:08,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147176795] [2021-05-03 14:06:08,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:08,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:08,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:08,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:08,488 INFO L87 Difference]: Start difference. First operand 10008 states and 32505 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-05-03 14:06:08,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:08,708 INFO L93 Difference]: Finished difference Result 10434 states and 33526 transitions. [2021-05-03 14:06:08,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:06:08,709 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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 21 [2021-05-03 14:06:08,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:08,725 INFO L225 Difference]: With dead ends: 10434 [2021-05-03 14:06:08,725 INFO L226 Difference]: Without dead ends: 10428 [2021-05-03 14:06:08,725 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 161.6ms TimeCoverageRelationStatistics Valid=241, Invalid=515, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:06:08,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10428 states. [2021-05-03 14:06:08,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10428 to 10011. [2021-05-03 14:06:08,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10011 states, 10010 states have (on average 3.2482517482517483) internal successors, (32515), 10010 states have internal predecessors, (32515), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:08,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10011 states to 10011 states and 32515 transitions. [2021-05-03 14:06:08,943 INFO L78 Accepts]: Start accepts. Automaton has 10011 states and 32515 transitions. Word has length 21 [2021-05-03 14:06:08,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:08,943 INFO L480 AbstractCegarLoop]: Abstraction has 10011 states and 32515 transitions. [2021-05-03 14:06:08,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-05-03 14:06:08,943 INFO L276 IsEmpty]: Start isEmpty. Operand 10011 states and 32515 transitions. [2021-05-03 14:06:08,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:08,949 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:08,949 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:09,149 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 179 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3375 [2021-05-03 14:06:09,150 INFO L428 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:09,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:09,150 INFO L82 PathProgramCache]: Analyzing trace with hash -286459605, now seen corresponding path program 178 times [2021-05-03 14:06:09,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:09,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357649726] [2021-05-03 14:06:09,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:09,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:09,229 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:09,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357649726] [2021-05-03 14:06:09,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386744646] [2021-05-03 14:06:09,229 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 [2021-05-03 14:06:09,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:06:09,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:09,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:09,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:09,290 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:09,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:09,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-03 14:06:09,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767375848] [2021-05-03 14:06:09,291 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:09,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:09,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:09,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:09,291 INFO L87 Difference]: Start difference. First operand 10011 states and 32515 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) [2021-05-03 14:06:09,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:09,507 INFO L93 Difference]: Finished difference Result 10403 states and 33484 transitions. [2021-05-03 14:06:09,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:06:09,507 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 21 [2021-05-03 14:06:09,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:09,523 INFO L225 Difference]: With dead ends: 10403 [2021-05-03 14:06:09,523 INFO L226 Difference]: Without dead ends: 10396 [2021-05-03 14:06:09,524 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 170.0ms TimeCoverageRelationStatistics Valid=241, Invalid=515, Unknown=0, NotChecked=0, Total=756 [2021-05-03 14:06:09,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10396 states. [2021-05-03 14:06:09,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10396 to 10027. [2021-05-03 14:06:09,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10027 states, 10026 states have (on average 3.246658687412727) internal successors, (32551), 10026 states have internal predecessors, (32551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:09,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10027 states to 10027 states and 32551 transitions. [2021-05-03 14:06:09,681 INFO L78 Accepts]: Start accepts. Automaton has 10027 states and 32551 transitions. Word has length 21 [2021-05-03 14:06:09,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:09,681 INFO L480 AbstractCegarLoop]: Abstraction has 10027 states and 32551 transitions. [2021-05-03 14:06:09,681 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) [2021-05-03 14:06:09,681 INFO L276 IsEmpty]: Start isEmpty. Operand 10027 states and 32551 transitions. [2021-05-03 14:06:09,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:09,687 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:09,687 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:09,888 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3376,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:09,888 INFO L428 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:09,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:09,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1337942037, now seen corresponding path program 179 times [2021-05-03 14:06:09,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:09,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310514212] [2021-05-03 14:06:09,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:09,944 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:09,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310514212] [2021-05-03 14:06:09,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434295597] [2021-05-03 14:06:09,945 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 [2021-05-03 14:06:09,966 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:06:09,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:09,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:09,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:10,038 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-05-03 14:06:10,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:10,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 14 [2021-05-03 14:06:10,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807604846] [2021-05-03 14:06:10,039 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:06:10,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:10,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:06:10,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:10,039 INFO L87 Difference]: Start difference. First operand 10027 states and 32551 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) [2021-05-03 14:06:10,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:10,193 INFO L93 Difference]: Finished difference Result 10268 states and 33007 transitions. [2021-05-03 14:06:10,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:06:10,193 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 21 [2021-05-03 14:06:10,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:10,208 INFO L225 Difference]: With dead ends: 10268 [2021-05-03 14:06:10,209 INFO L226 Difference]: Without dead ends: 10268 [2021-05-03 14:06:10,209 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 116.8ms TimeCoverageRelationStatistics Valid=157, Invalid=305, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:06:10,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10268 states. [2021-05-03 14:06:10,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10268 to 10029. [2021-05-03 14:06:10,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10029 states, 10028 states have (on average 3.2461108895093735) internal successors, (32552), 10028 states have internal predecessors, (32552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:10,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10029 states to 10029 states and 32552 transitions. [2021-05-03 14:06:10,356 INFO L78 Accepts]: Start accepts. Automaton has 10029 states and 32552 transitions. Word has length 21 [2021-05-03 14:06:10,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:10,356 INFO L480 AbstractCegarLoop]: Abstraction has 10029 states and 32552 transitions. [2021-05-03 14:06:10,356 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) [2021-05-03 14:06:10,356 INFO L276 IsEmpty]: Start isEmpty. Operand 10029 states and 32552 transitions. [2021-05-03 14:06:10,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:10,362 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:10,362 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:10,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3377,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:10,563 INFO L428 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:10,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:10,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1308049587, now seen corresponding path program 180 times [2021-05-03 14:06:10,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:10,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051527216] [2021-05-03 14:06:10,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:10,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:10,627 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:10,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051527216] [2021-05-03 14:06:10,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505903049] [2021-05-03 14:06:10,627 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 [2021-05-03 14:06:10,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:06:10,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:10,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:10,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:10,690 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:06:10,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:10,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-05-03 14:06:10,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487340414] [2021-05-03 14:06:10,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:06:10,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:10,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:06:10,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:06:10,691 INFO L87 Difference]: Start difference. First operand 10029 states and 32552 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) [2021-05-03 14:06:10,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:10,840 INFO L93 Difference]: Finished difference Result 10257 states and 33080 transitions. [2021-05-03 14:06:10,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:06:10,841 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 21 [2021-05-03 14:06:10,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:10,856 INFO L225 Difference]: With dead ends: 10257 [2021-05-03 14:06:10,857 INFO L226 Difference]: Without dead ends: 10252 [2021-05-03 14:06:10,857 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 115.4ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:06:10,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10252 states. [2021-05-03 14:06:10,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10252 to 10029. [2021-05-03 14:06:10,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10029 states, 10028 states have (on average 3.245911447945752) internal successors, (32550), 10028 states have internal predecessors, (32550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:11,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10029 states to 10029 states and 32550 transitions. [2021-05-03 14:06:11,004 INFO L78 Accepts]: Start accepts. Automaton has 10029 states and 32550 transitions. Word has length 21 [2021-05-03 14:06:11,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:11,004 INFO L480 AbstractCegarLoop]: Abstraction has 10029 states and 32550 transitions. [2021-05-03 14:06:11,004 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) [2021-05-03 14:06:11,004 INFO L276 IsEmpty]: Start isEmpty. Operand 10029 states and 32550 transitions. [2021-05-03 14:06:11,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:11,010 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:11,010 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:11,211 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3378,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:11,211 INFO L428 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:11,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:11,211 INFO L82 PathProgramCache]: Analyzing trace with hash 40592409, now seen corresponding path program 181 times [2021-05-03 14:06:11,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:11,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554455337] [2021-05-03 14:06:11,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:11,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:11,281 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:11,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554455337] [2021-05-03 14:06:11,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173747938] [2021-05-03 14:06:11,282 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 [2021-05-03 14:06:11,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:11,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:11,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:11,337 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:11,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:11,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-05-03 14:06:11,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174313309] [2021-05-03 14:06:11,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:06:11,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:11,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:06:11,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:11,338 INFO L87 Difference]: Start difference. First operand 10029 states and 32550 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) [2021-05-03 14:06:11,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:11,517 INFO L93 Difference]: Finished difference Result 10339 states and 33223 transitions. [2021-05-03 14:06:11,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:06:11,518 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 21 [2021-05-03 14:06:11,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:11,533 INFO L225 Difference]: With dead ends: 10339 [2021-05-03 14:06:11,533 INFO L226 Difference]: Without dead ends: 10334 [2021-05-03 14:06:11,533 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 130.9ms TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:06:11,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10334 states. [2021-05-03 14:06:11,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10334 to 10029. [2021-05-03 14:06:11,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10029 states, 10028 states have (on average 3.245512564818508) internal successors, (32546), 10028 states have internal predecessors, (32546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:11,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10029 states to 10029 states and 32546 transitions. [2021-05-03 14:06:11,687 INFO L78 Accepts]: Start accepts. Automaton has 10029 states and 32546 transitions. Word has length 21 [2021-05-03 14:06:11,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:11,687 INFO L480 AbstractCegarLoop]: Abstraction has 10029 states and 32546 transitions. [2021-05-03 14:06:11,687 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) [2021-05-03 14:06:11,687 INFO L276 IsEmpty]: Start isEmpty. Operand 10029 states and 32546 transitions. [2021-05-03 14:06:11,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:11,692 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:11,693 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:11,893 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3379 [2021-05-03 14:06:11,893 INFO L428 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:11,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:11,893 INFO L82 PathProgramCache]: Analyzing trace with hash -402306731, now seen corresponding path program 182 times [2021-05-03 14:06:11,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:11,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095233683] [2021-05-03 14:06:11,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:11,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:11,969 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:11,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095233683] [2021-05-03 14:06:11,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550617408] [2021-05-03 14:06:11,970 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 [2021-05-03 14:06:11,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:06:11,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:11,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:11,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:12,023 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:12,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:12,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-05-03 14:06:12,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86090880] [2021-05-03 14:06:12,023 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:06:12,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:12,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:06:12,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:12,024 INFO L87 Difference]: Start difference. First operand 10029 states and 32546 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) [2021-05-03 14:06:12,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:12,228 INFO L93 Difference]: Finished difference Result 10400 states and 33463 transitions. [2021-05-03 14:06:12,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:06:12,229 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 21 [2021-05-03 14:06:12,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:12,246 INFO L225 Difference]: With dead ends: 10400 [2021-05-03 14:06:12,246 INFO L226 Difference]: Without dead ends: 10394 [2021-05-03 14:06:12,246 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 153.2ms TimeCoverageRelationStatistics Valid=224, Invalid=478, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:06:12,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10394 states. [2021-05-03 14:06:12,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10394 to 10047. [2021-05-03 14:06:12,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10047 states, 10046 states have (on average 3.244873581524985) internal successors, (32598), 10046 states have internal predecessors, (32598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:12,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10047 states to 10047 states and 32598 transitions. [2021-05-03 14:06:12,425 INFO L78 Accepts]: Start accepts. Automaton has 10047 states and 32598 transitions. Word has length 21 [2021-05-03 14:06:12,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:12,425 INFO L480 AbstractCegarLoop]: Abstraction has 10047 states and 32598 transitions. [2021-05-03 14:06:12,425 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) [2021-05-03 14:06:12,425 INFO L276 IsEmpty]: Start isEmpty. Operand 10047 states and 32598 transitions. [2021-05-03 14:06:12,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:12,431 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:12,431 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:12,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3380 [2021-05-03 14:06:12,632 INFO L428 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:12,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:12,632 INFO L82 PathProgramCache]: Analyzing trace with hash -595874445, now seen corresponding path program 183 times [2021-05-03 14:06:12,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:12,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792578272] [2021-05-03 14:06:12,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:12,705 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 21 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:12,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792578272] [2021-05-03 14:06:12,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368677530] [2021-05-03 14:06:12,705 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) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:12,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:06:12,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:12,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:06:12,727 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:12,776 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:12,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:12,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:06:12,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773382630] [2021-05-03 14:06:12,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:12,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:12,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:12,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:12,777 INFO L87 Difference]: Start difference. First operand 10047 states and 32598 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-05-03 14:06:12,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:12,991 INFO L93 Difference]: Finished difference Result 10336 states and 33135 transitions. [2021-05-03 14:06:12,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:06:12,991 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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 21 [2021-05-03 14:06:12,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:13,009 INFO L225 Difference]: With dead ends: 10336 [2021-05-03 14:06:13,009 INFO L226 Difference]: Without dead ends: 10331 [2021-05-03 14:06:13,009 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 148.9ms TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:06:13,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10331 states. [2021-05-03 14:06:13,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10331 to 10047. [2021-05-03 14:06:13,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10047 states, 10046 states have (on average 3.244574955206052) internal successors, (32595), 10046 states have internal predecessors, (32595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:13,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10047 states to 10047 states and 32595 transitions. [2021-05-03 14:06:13,169 INFO L78 Accepts]: Start accepts. Automaton has 10047 states and 32595 transitions. Word has length 21 [2021-05-03 14:06:13,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:13,169 INFO L480 AbstractCegarLoop]: Abstraction has 10047 states and 32595 transitions. [2021-05-03 14:06:13,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-05-03 14:06:13,169 INFO L276 IsEmpty]: Start isEmpty. Operand 10047 states and 32595 transitions. [2021-05-03 14:06:13,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:13,175 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:13,175 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:13,375 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3381 [2021-05-03 14:06:13,375 INFO L428 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:13,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:13,376 INFO L82 PathProgramCache]: Analyzing trace with hash -1038773585, now seen corresponding path program 184 times [2021-05-03 14:06:13,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:13,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374803417] [2021-05-03 14:06:13,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:13,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:13,447 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:13,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374803417] [2021-05-03 14:06:13,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [208127030] [2021-05-03 14:06:13,447 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 [2021-05-03 14:06:13,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:06:13,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:13,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:13,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:13,514 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:13,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:13,514 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-03 14:06:13,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028892824] [2021-05-03 14:06:13,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:13,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:13,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:13,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:13,515 INFO L87 Difference]: Start difference. First operand 10047 states and 32595 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) [2021-05-03 14:06:13,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:13,742 INFO L93 Difference]: Finished difference Result 10532 states and 33761 transitions. [2021-05-03 14:06:13,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:06:13,743 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 21 [2021-05-03 14:06:13,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:13,761 INFO L225 Difference]: With dead ends: 10532 [2021-05-03 14:06:13,761 INFO L226 Difference]: Without dead ends: 10526 [2021-05-03 14:06:13,761 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 171.9ms TimeCoverageRelationStatistics Valid=259, Invalid=553, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:06:13,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10526 states. [2021-05-03 14:06:13,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10526 to 10055. [2021-05-03 14:06:13,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10055 states, 10054 states have (on average 3.244778197732246) internal successors, (32623), 10054 states have internal predecessors, (32623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:13,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10055 states to 10055 states and 32623 transitions. [2021-05-03 14:06:13,915 INFO L78 Accepts]: Start accepts. Automaton has 10055 states and 32623 transitions. Word has length 21 [2021-05-03 14:06:13,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:13,915 INFO L480 AbstractCegarLoop]: Abstraction has 10055 states and 32623 transitions. [2021-05-03 14:06:13,915 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) [2021-05-03 14:06:13,915 INFO L276 IsEmpty]: Start isEmpty. Operand 10055 states and 32623 transitions. [2021-05-03 14:06:13,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:13,921 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:13,921 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:14,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3382,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:14,122 INFO L428 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:14,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:14,122 INFO L82 PathProgramCache]: Analyzing trace with hash -1883745037, now seen corresponding path program 185 times [2021-05-03 14:06:14,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:14,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813877180] [2021-05-03 14:06:14,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:14,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:14,202 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:14,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813877180] [2021-05-03 14:06:14,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685982071] [2021-05-03 14:06:14,203 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) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:14,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:06:14,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:14,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:14,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:14,268 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:14,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:14,268 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-03 14:06:14,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358871521] [2021-05-03 14:06:14,268 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:14,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:14,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:14,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:14,269 INFO L87 Difference]: Start difference. First operand 10055 states and 32623 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) [2021-05-03 14:06:14,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:14,496 INFO L93 Difference]: Finished difference Result 10492 states and 33704 transitions. [2021-05-03 14:06:14,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:06:14,497 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 21 [2021-05-03 14:06:14,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:14,513 INFO L225 Difference]: With dead ends: 10492 [2021-05-03 14:06:14,513 INFO L226 Difference]: Without dead ends: 10485 [2021-05-03 14:06:14,513 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 182.2ms TimeCoverageRelationStatistics Valid=260, Invalid=552, Unknown=0, NotChecked=0, Total=812 [2021-05-03 14:06:14,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10485 states. [2021-05-03 14:06:14,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10485 to 10067. [2021-05-03 14:06:14,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10067 states, 10066 states have (on average 3.2445857341545796) internal successors, (32660), 10066 states have internal predecessors, (32660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:14,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10067 states to 10067 states and 32660 transitions. [2021-05-03 14:06:14,667 INFO L78 Accepts]: Start accepts. Automaton has 10067 states and 32660 transitions. Word has length 21 [2021-05-03 14:06:14,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:14,668 INFO L480 AbstractCegarLoop]: Abstraction has 10067 states and 32660 transitions. [2021-05-03 14:06:14,668 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) [2021-05-03 14:06:14,668 INFO L276 IsEmpty]: Start isEmpty. Operand 10067 states and 32660 transitions. [2021-05-03 14:06:14,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:14,674 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:14,674 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:14,874 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3383,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:14,874 INFO L428 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:14,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:14,875 INFO L82 PathProgramCache]: Analyzing trace with hash 482340035, now seen corresponding path program 186 times [2021-05-03 14:06:14,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:14,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106053562] [2021-05-03 14:06:14,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:14,929 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:14,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106053562] [2021-05-03 14:06:14,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411707968] [2021-05-03 14:06:14,930 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 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 [2021-05-03 14:06:14,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:06:14,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:14,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:06:14,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:14,992 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:06:14,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:14,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:06:14,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287342209] [2021-05-03 14:06:14,993 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:06:14,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:14,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:06:14,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:06:14,993 INFO L87 Difference]: Start difference. First operand 10067 states and 32660 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) [2021-05-03 14:06:15,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:15,085 INFO L93 Difference]: Finished difference Result 10308 states and 33030 transitions. [2021-05-03 14:06:15,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:06:15,085 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 21 [2021-05-03 14:06:15,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:15,102 INFO L225 Difference]: With dead ends: 10308 [2021-05-03 14:06:15,102 INFO L226 Difference]: Without dead ends: 10308 [2021-05-03 14:06:15,103 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 54.8ms TimeCoverageRelationStatistics Valid=78, Invalid=104, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:06:15,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10308 states. [2021-05-03 14:06:15,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10308 to 10076. [2021-05-03 14:06:15,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 3.2450620347394543) internal successors, (32694), 10075 states have internal predecessors, (32694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:15,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 32694 transitions. [2021-05-03 14:06:15,259 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 32694 transitions. Word has length 21 [2021-05-03 14:06:15,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:15,259 INFO L480 AbstractCegarLoop]: Abstraction has 10076 states and 32694 transitions. [2021-05-03 14:06:15,259 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) [2021-05-03 14:06:15,259 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 32694 transitions. [2021-05-03 14:06:15,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:15,265 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:15,265 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:15,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3384 [2021-05-03 14:06:15,466 INFO L428 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:15,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:15,466 INFO L82 PathProgramCache]: Analyzing trace with hash -2072534951, now seen corresponding path program 187 times [2021-05-03 14:06:15,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:15,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489058406] [2021-05-03 14:06:15,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:15,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:15,580 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:15,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489058406] [2021-05-03 14:06:15,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634196683] [2021-05-03 14:06:15,581 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 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 [2021-05-03 14:06:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:15,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:15,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:15,641 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:06:15,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:15,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-05-03 14:06:15,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314941579] [2021-05-03 14:06:15,642 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:06:15,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:15,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:06:15,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:06:15,642 INFO L87 Difference]: Start difference. First operand 10076 states and 32694 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) [2021-05-03 14:06:15,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:15,754 INFO L93 Difference]: Finished difference Result 10304 states and 33012 transitions. [2021-05-03 14:06:15,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:06:15,755 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 21 [2021-05-03 14:06:15,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:15,773 INFO L225 Difference]: With dead ends: 10304 [2021-05-03 14:06:15,773 INFO L226 Difference]: Without dead ends: 10304 [2021-05-03 14:06:15,773 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 120.0ms TimeCoverageRelationStatistics Valid=92, Invalid=148, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:15,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10304 states. [2021-05-03 14:06:15,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10304 to 10076. [2021-05-03 14:06:15,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 3.2442679900744418) internal successors, (32686), 10075 states have internal predecessors, (32686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:15,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 32686 transitions. [2021-05-03 14:06:15,935 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 32686 transitions. Word has length 21 [2021-05-03 14:06:15,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:15,935 INFO L480 AbstractCegarLoop]: Abstraction has 10076 states and 32686 transitions. [2021-05-03 14:06:15,935 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) [2021-05-03 14:06:15,935 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 32686 transitions. [2021-05-03 14:06:15,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:15,941 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:15,941 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:16,142 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3385,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:16,143 INFO L428 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:16,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:16,143 INFO L82 PathProgramCache]: Analyzing trace with hash -361921643, now seen corresponding path program 188 times [2021-05-03 14:06:16,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:16,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723398285] [2021-05-03 14:06:16,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:16,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:16,203 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 27 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:16,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723398285] [2021-05-03 14:06:16,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135485324] [2021-05-03 14:06:16,203 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 [2021-05-03 14:06:16,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:06:16,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:16,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:16,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:16,257 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:16,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:16,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-05-03 14:06:16,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248863883] [2021-05-03 14:06:16,258 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:06:16,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:16,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:06:16,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:06:16,258 INFO L87 Difference]: Start difference. First operand 10076 states and 32686 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) [2021-05-03 14:06:16,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:16,428 INFO L93 Difference]: Finished difference Result 10301 states and 33002 transitions. [2021-05-03 14:06:16,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:06:16,429 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 21 [2021-05-03 14:06:16,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:16,445 INFO L225 Difference]: With dead ends: 10301 [2021-05-03 14:06:16,445 INFO L226 Difference]: Without dead ends: 10299 [2021-05-03 14:06:16,445 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 111.2ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:06:16,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10299 states. [2021-05-03 14:06:16,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10299 to 10076. [2021-05-03 14:06:16,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 3.2425806451612904) internal successors, (32669), 10075 states have internal predecessors, (32669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:16,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 32669 transitions. [2021-05-03 14:06:16,600 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 32669 transitions. Word has length 21 [2021-05-03 14:06:16,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:16,600 INFO L480 AbstractCegarLoop]: Abstraction has 10076 states and 32669 transitions. [2021-05-03 14:06:16,600 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) [2021-05-03 14:06:16,600 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 32669 transitions. [2021-05-03 14:06:16,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:16,607 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:16,607 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:16,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3386 [2021-05-03 14:06:16,809 INFO L428 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:16,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:16,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1127483353, now seen corresponding path program 189 times [2021-05-03 14:06:16,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:16,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623587667] [2021-05-03 14:06:16,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:16,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:16,873 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 24 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:16,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623587667] [2021-05-03 14:06:16,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19730942] [2021-05-03 14:06:16,873 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 [2021-05-03 14:06:16,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:06:16,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:16,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:06:16,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:16,940 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:16,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:16,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:06:16,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839918459] [2021-05-03 14:06:16,941 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:06:16,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:16,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:06:16,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:16,941 INFO L87 Difference]: Start difference. First operand 10076 states and 32669 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) [2021-05-03 14:06:17,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:17,139 INFO L93 Difference]: Finished difference Result 10306 states and 32992 transitions. [2021-05-03 14:06:17,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:06:17,139 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 21 [2021-05-03 14:06:17,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:17,155 INFO L225 Difference]: With dead ends: 10306 [2021-05-03 14:06:17,155 INFO L226 Difference]: Without dead ends: 10303 [2021-05-03 14:06:17,156 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 129.0ms TimeCoverageRelationStatistics Valid=203, Invalid=397, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:06:17,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10303 states. [2021-05-03 14:06:17,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10303 to 10076. [2021-05-03 14:06:17,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 3.2422828784119107) internal successors, (32666), 10075 states have internal predecessors, (32666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:17,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 32666 transitions. [2021-05-03 14:06:17,306 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 32666 transitions. Word has length 21 [2021-05-03 14:06:17,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:17,306 INFO L480 AbstractCegarLoop]: Abstraction has 10076 states and 32666 transitions. [2021-05-03 14:06:17,306 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) [2021-05-03 14:06:17,306 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 32666 transitions. [2021-05-03 14:06:17,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:17,312 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:17,312 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:17,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3387,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:17,512 INFO L428 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:17,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:17,513 INFO L82 PathProgramCache]: Analyzing trace with hash 54397973, now seen corresponding path program 190 times [2021-05-03 14:06:17,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:17,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781827707] [2021-05-03 14:06:17,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:17,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:17,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781827707] [2021-05-03 14:06:17,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199242526] [2021-05-03 14:06:17,579 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 [2021-05-03 14:06:17,602 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:06:17,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:17,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:17,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:17,644 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:06:17,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:17,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-03 14:06:17,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038951960] [2021-05-03 14:06:17,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:06:17,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:17,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:06:17,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:17,645 INFO L87 Difference]: Start difference. First operand 10076 states and 32666 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) [2021-05-03 14:06:17,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:17,814 INFO L93 Difference]: Finished difference Result 11212 states and 35976 transitions. [2021-05-03 14:06:17,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:06:17,815 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 21 [2021-05-03 14:06:17,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:17,831 INFO L225 Difference]: With dead ends: 11212 [2021-05-03 14:06:17,831 INFO L226 Difference]: Without dead ends: 11208 [2021-05-03 14:06:17,832 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 116.5ms TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:06:17,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11208 states. [2021-05-03 14:06:17,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11208 to 10076. [2021-05-03 14:06:17,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10076 states, 10075 states have (on average 3.241985111662531) internal successors, (32663), 10075 states have internal predecessors, (32663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:17,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10076 states to 10076 states and 32663 transitions. [2021-05-03 14:06:17,983 INFO L78 Accepts]: Start accepts. Automaton has 10076 states and 32663 transitions. Word has length 21 [2021-05-03 14:06:17,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:17,983 INFO L480 AbstractCegarLoop]: Abstraction has 10076 states and 32663 transitions. [2021-05-03 14:06:17,983 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) [2021-05-03 14:06:17,983 INFO L276 IsEmpty]: Start isEmpty. Operand 10076 states and 32663 transitions. [2021-05-03 14:06:17,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:17,989 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:17,989 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:18,189 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3388,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:18,190 INFO L428 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:18,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:18,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1148489561, now seen corresponding path program 191 times [2021-05-03 14:06:18,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:18,190 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514716832] [2021-05-03 14:06:18,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:18,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:18,262 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:18,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514716832] [2021-05-03 14:06:18,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604713384] [2021-05-03 14:06:18,263 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 [2021-05-03 14:06:18,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:06:18,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:18,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:18,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:18,336 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:18,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:18,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-03 14:06:18,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490036476] [2021-05-03 14:06:18,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:18,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:18,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:18,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:18,347 INFO L87 Difference]: Start difference. First operand 10076 states and 32663 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) [2021-05-03 14:06:18,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:18,566 INFO L93 Difference]: Finished difference Result 11223 states and 35989 transitions. [2021-05-03 14:06:18,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:06:18,567 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 21 [2021-05-03 14:06:18,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:18,585 INFO L225 Difference]: With dead ends: 11223 [2021-05-03 14:06:18,585 INFO L226 Difference]: Without dead ends: 11218 [2021-05-03 14:06:18,585 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 141.5ms TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:06:18,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11218 states. [2021-05-03 14:06:18,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11218 to 10154. [2021-05-03 14:06:18,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10154 states, 10153 states have (on average 3.2445582586427655) internal successors, (32942), 10153 states have internal predecessors, (32942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:18,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10154 states to 10154 states and 32942 transitions. [2021-05-03 14:06:18,782 INFO L78 Accepts]: Start accepts. Automaton has 10154 states and 32942 transitions. Word has length 21 [2021-05-03 14:06:18,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:18,783 INFO L480 AbstractCegarLoop]: Abstraction has 10154 states and 32942 transitions. [2021-05-03 14:06:18,783 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) [2021-05-03 14:06:18,783 INFO L276 IsEmpty]: Start isEmpty. Operand 10154 states and 32942 transitions. [2021-05-03 14:06:18,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:18,789 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:18,789 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:18,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3389,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:18,990 INFO L428 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:18,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:18,990 INFO L82 PathProgramCache]: Analyzing trace with hash 705590421, now seen corresponding path program 192 times [2021-05-03 14:06:18,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:18,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462990696] [2021-05-03 14:06:18,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:18,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:19,062 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:19,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462990696] [2021-05-03 14:06:19,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996872598] [2021-05-03 14:06:19,063 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 [2021-05-03 14:06:19,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:06:19,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:19,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:19,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:19,125 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 30 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:19,125 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:19,125 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-03 14:06:19,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466003964] [2021-05-03 14:06:19,125 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:19,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:19,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:19,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:19,126 INFO L87 Difference]: Start difference. First operand 10154 states and 32942 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) [2021-05-03 14:06:19,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:19,289 INFO L93 Difference]: Finished difference Result 10405 states and 33574 transitions. [2021-05-03 14:06:19,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:06:19,290 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 21 [2021-05-03 14:06:19,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:19,306 INFO L225 Difference]: With dead ends: 10405 [2021-05-03 14:06:19,306 INFO L226 Difference]: Without dead ends: 10400 [2021-05-03 14:06:19,306 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 133.2ms TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:06:19,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10400 states. [2021-05-03 14:06:19,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10400 to 10154. [2021-05-03 14:06:19,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10154 states, 10153 states have (on average 3.244459765586526) internal successors, (32941), 10153 states have internal predecessors, (32941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:19,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10154 states to 10154 states and 32941 transitions. [2021-05-03 14:06:19,446 INFO L78 Accepts]: Start accepts. Automaton has 10154 states and 32941 transitions. Word has length 21 [2021-05-03 14:06:19,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:19,447 INFO L480 AbstractCegarLoop]: Abstraction has 10154 states and 32941 transitions. [2021-05-03 14:06:19,447 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) [2021-05-03 14:06:19,447 INFO L276 IsEmpty]: Start isEmpty. Operand 10154 states and 32941 transitions. [2021-05-03 14:06:19,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:19,453 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:19,453 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:19,653 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3390,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:19,653 INFO L428 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:19,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:19,653 INFO L82 PathProgramCache]: Analyzing trace with hash -139381031, now seen corresponding path program 193 times [2021-05-03 14:06:19,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:19,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447736075] [2021-05-03 14:06:19,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:19,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:19,731 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:19,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447736075] [2021-05-03 14:06:19,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989433945] [2021-05-03 14:06:19,732 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 [2021-05-03 14:06:19,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:19,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:19,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:19,795 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:19,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:19,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-03 14:06:19,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436139557] [2021-05-03 14:06:19,796 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:19,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:19,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:19,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:19,796 INFO L87 Difference]: Start difference. First operand 10154 states and 32941 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) [2021-05-03 14:06:19,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:19,971 INFO L93 Difference]: Finished difference Result 10382 states and 33519 transitions. [2021-05-03 14:06:19,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:06:19,972 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 21 [2021-05-03 14:06:19,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:19,989 INFO L225 Difference]: With dead ends: 10382 [2021-05-03 14:06:19,989 INFO L226 Difference]: Without dead ends: 10376 [2021-05-03 14:06:19,989 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 142.8ms TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:06:19,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10376 states. [2021-05-03 14:06:20,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10376 to 10154. [2021-05-03 14:06:20,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10154 states, 10153 states have (on average 3.244361272530287) internal successors, (32940), 10153 states have internal predecessors, (32940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:20,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10154 states to 10154 states and 32940 transitions. [2021-05-03 14:06:20,142 INFO L78 Accepts]: Start accepts. Automaton has 10154 states and 32940 transitions. Word has length 21 [2021-05-03 14:06:20,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:20,142 INFO L480 AbstractCegarLoop]: Abstraction has 10154 states and 32940 transitions. [2021-05-03 14:06:20,142 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) [2021-05-03 14:06:20,142 INFO L276 IsEmpty]: Start isEmpty. Operand 10154 states and 32940 transitions. [2021-05-03 14:06:20,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:20,149 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:20,149 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:20,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3391 [2021-05-03 14:06:20,349 INFO L428 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:20,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:20,349 INFO L82 PathProgramCache]: Analyzing trace with hash -563692267, now seen corresponding path program 194 times [2021-05-03 14:06:20,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:20,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958427948] [2021-05-03 14:06:20,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:20,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:20,479 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:20,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958427948] [2021-05-03 14:06:20,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995724597] [2021-05-03 14:06:20,480 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 [2021-05-03 14:06:20,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:06:20,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:20,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:20,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:20,558 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:20,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:20,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-03 14:06:20,559 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913038684] [2021-05-03 14:06:20,559 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:20,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:20,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:20,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:20,559 INFO L87 Difference]: Start difference. First operand 10154 states and 32940 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) [2021-05-03 14:06:20,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:20,786 INFO L93 Difference]: Finished difference Result 10354 states and 33463 transitions. [2021-05-03 14:06:20,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:06:20,787 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 21 [2021-05-03 14:06:20,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:20,810 INFO L225 Difference]: With dead ends: 10354 [2021-05-03 14:06:20,811 INFO L226 Difference]: Without dead ends: 10347 [2021-05-03 14:06:20,811 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 211.8ms TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:06:20,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10347 states. [2021-05-03 14:06:20,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10347 to 10154. [2021-05-03 14:06:20,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10154 states, 10153 states have (on average 3.244262779474047) internal successors, (32939), 10153 states have internal predecessors, (32939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:20,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10154 states to 10154 states and 32939 transitions. [2021-05-03 14:06:20,978 INFO L78 Accepts]: Start accepts. Automaton has 10154 states and 32939 transitions. Word has length 21 [2021-05-03 14:06:20,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:20,978 INFO L480 AbstractCegarLoop]: Abstraction has 10154 states and 32939 transitions. [2021-05-03 14:06:20,978 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) [2021-05-03 14:06:20,978 INFO L276 IsEmpty]: Start isEmpty. Operand 10154 states and 32939 transitions. [2021-05-03 14:06:20,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:20,984 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:20,984 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:21,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3392 [2021-05-03 14:06:21,185 INFO L428 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:21,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:21,185 INFO L82 PathProgramCache]: Analyzing trace with hash -933266099, now seen corresponding path program 195 times [2021-05-03 14:06:21,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:21,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353963795] [2021-05-03 14:06:21,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:21,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:21,248 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:21,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353963795] [2021-05-03 14:06:21,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305276440] [2021-05-03 14:06:21,248 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 [2021-05-03 14:06:21,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:06:21,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:21,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:06:21,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 41 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:21,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:21,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:06:21,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952075682] [2021-05-03 14:06:21,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:06:21,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:21,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:06:21,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:06:21,313 INFO L87 Difference]: Start difference. First operand 10154 states and 32939 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) [2021-05-03 14:06:21,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:21,449 INFO L93 Difference]: Finished difference Result 10360 states and 33271 transitions. [2021-05-03 14:06:21,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:06:21,450 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 21 [2021-05-03 14:06:21,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:21,468 INFO L225 Difference]: With dead ends: 10360 [2021-05-03 14:06:21,468 INFO L226 Difference]: Without dead ends: 10360 [2021-05-03 14:06:21,469 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 94.7ms TimeCoverageRelationStatistics Valid=144, Invalid=236, Unknown=0, NotChecked=0, Total=380 [2021-05-03 14:06:21,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10360 states. [2021-05-03 14:06:21,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10360 to 10157. [2021-05-03 14:06:21,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10157 states, 10156 states have (on average 3.2441906262307993) internal successors, (32948), 10156 states have internal predecessors, (32948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:21,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10157 states to 10157 states and 32948 transitions. [2021-05-03 14:06:21,634 INFO L78 Accepts]: Start accepts. Automaton has 10157 states and 32948 transitions. Word has length 21 [2021-05-03 14:06:21,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:21,634 INFO L480 AbstractCegarLoop]: Abstraction has 10157 states and 32948 transitions. [2021-05-03 14:06:21,634 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) [2021-05-03 14:06:21,634 INFO L276 IsEmpty]: Start isEmpty. Operand 10157 states and 32948 transitions. [2021-05-03 14:06:21,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:21,641 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:21,641 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:21,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3393 [2021-05-03 14:06:21,841 INFO L428 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:21,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:21,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1621452429, now seen corresponding path program 196 times [2021-05-03 14:06:21,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:21,842 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428826887] [2021-05-03 14:06:21,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:21,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:21,953 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:21,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428826887] [2021-05-03 14:06:21,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526522158] [2021-05-03 14:06:21,953 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 [2021-05-03 14:06:21,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:06:21,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:21,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:21,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:22,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:22,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 14 [2021-05-03 14:06:22,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546239457] [2021-05-03 14:06:22,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:06:22,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:22,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:06:22,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:22,010 INFO L87 Difference]: Start difference. First operand 10157 states and 32948 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) [2021-05-03 14:06:22,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:22,227 INFO L93 Difference]: Finished difference Result 10425 states and 33574 transitions. [2021-05-03 14:06:22,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:06:22,227 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 21 [2021-05-03 14:06:22,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:22,242 INFO L225 Difference]: With dead ends: 10425 [2021-05-03 14:06:22,242 INFO L226 Difference]: Without dead ends: 10419 [2021-05-03 14:06:22,242 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 162.8ms TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:06:22,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10419 states. [2021-05-03 14:06:22,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10419 to 10157. [2021-05-03 14:06:22,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10157 states, 10156 states have (on average 3.24399369830642) internal successors, (32946), 10156 states have internal predecessors, (32946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:22,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10157 states to 10157 states and 32946 transitions. [2021-05-03 14:06:22,389 INFO L78 Accepts]: Start accepts. Automaton has 10157 states and 32946 transitions. Word has length 21 [2021-05-03 14:06:22,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:22,389 INFO L480 AbstractCegarLoop]: Abstraction has 10157 states and 32946 transitions. [2021-05-03 14:06:22,390 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) [2021-05-03 14:06:22,390 INFO L276 IsEmpty]: Start isEmpty. Operand 10157 states and 32946 transitions. [2021-05-03 14:06:22,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:22,396 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:22,396 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:22,596 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3394 [2021-05-03 14:06:22,596 INFO L428 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:22,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:22,597 INFO L82 PathProgramCache]: Analyzing trace with hash 984985575, now seen corresponding path program 197 times [2021-05-03 14:06:22,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:22,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767425777] [2021-05-03 14:06:22,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:22,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:22,669 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:22,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767425777] [2021-05-03 14:06:22,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140901698] [2021-05-03 14:06:22,670 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 [2021-05-03 14:06:22,693 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:06:22,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:22,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:06:22,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:22,740 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:22,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:22,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:06:22,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780743724] [2021-05-03 14:06:22,740 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:22,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:22,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:22,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:22,741 INFO L87 Difference]: Start difference. First operand 10157 states and 32946 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-05-03 14:06:22,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:22,939 INFO L93 Difference]: Finished difference Result 10525 states and 33745 transitions. [2021-05-03 14:06:22,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:06:22,940 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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 21 [2021-05-03 14:06:22,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:22,957 INFO L225 Difference]: With dead ends: 10525 [2021-05-03 14:06:22,957 INFO L226 Difference]: Without dead ends: 10519 [2021-05-03 14:06:22,957 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 153.5ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:06:22,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10519 states. [2021-05-03 14:06:23,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10519 to 10157. [2021-05-03 14:06:23,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10157 states, 10156 states have (on average 3.24379677038204) internal successors, (32944), 10156 states have internal predecessors, (32944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:23,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10157 states to 10157 states and 32944 transitions. [2021-05-03 14:06:23,114 INFO L78 Accepts]: Start accepts. Automaton has 10157 states and 32944 transitions. Word has length 21 [2021-05-03 14:06:23,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:23,115 INFO L480 AbstractCegarLoop]: Abstraction has 10157 states and 32944 transitions. [2021-05-03 14:06:23,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-05-03 14:06:23,115 INFO L276 IsEmpty]: Start isEmpty. Operand 10157 states and 32944 transitions. [2021-05-03 14:06:23,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:23,121 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:23,121 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:23,321 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3395,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:23,321 INFO L428 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:23,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:23,322 INFO L82 PathProgramCache]: Analyzing trace with hash 140014123, now seen corresponding path program 198 times [2021-05-03 14:06:23,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:23,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986876029] [2021-05-03 14:06:23,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:23,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:23,398 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:23,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986876029] [2021-05-03 14:06:23,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725594514] [2021-05-03 14:06:23,398 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 [2021-05-03 14:06:23,419 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:06:23,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:23,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:23,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:23,463 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:23,464 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:23,464 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-03 14:06:23,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856692771] [2021-05-03 14:06:23,464 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:23,464 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:23,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:23,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:23,465 INFO L87 Difference]: Start difference. First operand 10157 states and 32944 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) [2021-05-03 14:06:23,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:23,715 INFO L93 Difference]: Finished difference Result 10675 states and 34250 transitions. [2021-05-03 14:06:23,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-03 14:06:23,715 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 21 [2021-05-03 14:06:23,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:23,732 INFO L225 Difference]: With dead ends: 10675 [2021-05-03 14:06:23,733 INFO L226 Difference]: Without dead ends: 10668 [2021-05-03 14:06:23,733 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 190.9ms TimeCoverageRelationStatistics Valid=278, Invalid=592, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:06:23,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10668 states. [2021-05-03 14:06:23,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10668 to 10194. [2021-05-03 14:06:23,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10194 states, 10193 states have (on average 3.2428136956735014) internal successors, (33054), 10193 states have internal predecessors, (33054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:23,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10194 states to 10194 states and 33054 transitions. [2021-05-03 14:06:23,897 INFO L78 Accepts]: Start accepts. Automaton has 10194 states and 33054 transitions. Word has length 21 [2021-05-03 14:06:23,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:23,898 INFO L480 AbstractCegarLoop]: Abstraction has 10194 states and 33054 transitions. [2021-05-03 14:06:23,898 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) [2021-05-03 14:06:23,898 INFO L276 IsEmpty]: Start isEmpty. Operand 10194 states and 33054 transitions. [2021-05-03 14:06:23,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:23,904 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:23,904 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:24,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3396 [2021-05-03 14:06:24,105 INFO L428 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:24,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:24,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1565617715, now seen corresponding path program 199 times [2021-05-03 14:06:24,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:24,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747233950] [2021-05-03 14:06:24,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:24,179 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:24,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747233950] [2021-05-03 14:06:24,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688722440] [2021-05-03 14:06:24,179 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 [2021-05-03 14:06:24,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:24,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:24,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:24,242 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:24,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:24,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-03 14:06:24,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107750200] [2021-05-03 14:06:24,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:24,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:24,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:24,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:24,243 INFO L87 Difference]: Start difference. First operand 10194 states and 33054 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) [2021-05-03 14:06:24,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:24,432 INFO L93 Difference]: Finished difference Result 10950 states and 35064 transitions. [2021-05-03 14:06:24,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:06:24,433 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 21 [2021-05-03 14:06:24,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:24,451 INFO L225 Difference]: With dead ends: 10950 [2021-05-03 14:06:24,451 INFO L226 Difference]: Without dead ends: 10944 [2021-05-03 14:06:24,452 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 145.1ms TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:06:24,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10944 states. [2021-05-03 14:06:24,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10944 to 10207. [2021-05-03 14:06:24,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10207 states, 10206 states have (on average 3.242994317068391) internal successors, (33098), 10206 states have internal predecessors, (33098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:24,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10207 states to 10207 states and 33098 transitions. [2021-05-03 14:06:24,623 INFO L78 Accepts]: Start accepts. Automaton has 10207 states and 33098 transitions. Word has length 21 [2021-05-03 14:06:24,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:24,623 INFO L480 AbstractCegarLoop]: Abstraction has 10207 states and 33098 transitions. [2021-05-03 14:06:24,623 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) [2021-05-03 14:06:24,623 INFO L276 IsEmpty]: Start isEmpty. Operand 10207 states and 33098 transitions. [2021-05-03 14:06:24,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:24,630 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:24,630 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:24,830 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3397 [2021-05-03 14:06:24,830 INFO L428 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:24,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:24,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1884378129, now seen corresponding path program 200 times [2021-05-03 14:06:24,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:24,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731430334] [2021-05-03 14:06:24,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:24,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:24,908 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:24,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731430334] [2021-05-03 14:06:24,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491284916] [2021-05-03 14:06:24,909 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 [2021-05-03 14:06:24,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:06:24,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:24,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:24,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 33 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:24,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:24,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-03 14:06:24,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952316633] [2021-05-03 14:06:24,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:24,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:24,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:24,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:24,973 INFO L87 Difference]: Start difference. First operand 10207 states and 33098 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) [2021-05-03 14:06:25,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:25,150 INFO L93 Difference]: Finished difference Result 10448 states and 33689 transitions. [2021-05-03 14:06:25,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:06:25,151 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 21 [2021-05-03 14:06:25,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:25,168 INFO L225 Difference]: With dead ends: 10448 [2021-05-03 14:06:25,168 INFO L226 Difference]: Without dead ends: 10442 [2021-05-03 14:06:25,168 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 151.4ms TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:06:25,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10442 states. [2021-05-03 14:06:25,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10442 to 10207. [2021-05-03 14:06:25,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10207 states, 10206 states have (on average 3.242896335488928) internal successors, (33097), 10206 states have internal predecessors, (33097), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:25,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10207 states to 10207 states and 33097 transitions. [2021-05-03 14:06:25,370 INFO L78 Accepts]: Start accepts. Automaton has 10207 states and 33097 transitions. Word has length 21 [2021-05-03 14:06:25,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:25,370 INFO L480 AbstractCegarLoop]: Abstraction has 10207 states and 33097 transitions. [2021-05-03 14:06:25,370 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) [2021-05-03 14:06:25,370 INFO L276 IsEmpty]: Start isEmpty. Operand 10207 states and 33097 transitions. [2021-05-03 14:06:25,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:25,377 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:25,377 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:25,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3398,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:25,577 INFO L428 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:25,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:25,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1460066893, now seen corresponding path program 201 times [2021-05-03 14:06:25,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:25,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176199121] [2021-05-03 14:06:25,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:25,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:25,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176199121] [2021-05-03 14:06:25,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684140231] [2021-05-03 14:06:25,660 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 [2021-05-03 14:06:25,681 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-05-03 14:06:25,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:25,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:06:25,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:25,727 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:25,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:25,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:06:25,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026627618] [2021-05-03 14:06:25,728 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:25,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:25,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:25,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:25,728 INFO L87 Difference]: Start difference. First operand 10207 states and 33097 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-05-03 14:06:25,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:25,919 INFO L93 Difference]: Finished difference Result 10417 states and 33634 transitions. [2021-05-03 14:06:25,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:06:25,919 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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 21 [2021-05-03 14:06:25,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:25,935 INFO L225 Difference]: With dead ends: 10417 [2021-05-03 14:06:25,935 INFO L226 Difference]: Without dead ends: 10410 [2021-05-03 14:06:25,935 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 158.6ms TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:06:25,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10410 states. [2021-05-03 14:06:26,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10410 to 10207. [2021-05-03 14:06:26,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10207 states, 10206 states have (on average 3.242798353909465) internal successors, (33096), 10206 states have internal predecessors, (33096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:26,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10207 states to 10207 states and 33096 transitions. [2021-05-03 14:06:26,084 INFO L78 Accepts]: Start accepts. Automaton has 10207 states and 33096 transitions. Word has length 21 [2021-05-03 14:06:26,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:26,084 INFO L480 AbstractCegarLoop]: Abstraction has 10207 states and 33096 transitions. [2021-05-03 14:06:26,085 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-05-03 14:06:26,085 INFO L276 IsEmpty]: Start isEmpty. Operand 10207 states and 33096 transitions. [2021-05-03 14:06:26,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:26,091 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:26,091 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:26,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3399,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:26,291 INFO L428 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:26,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:26,292 INFO L82 PathProgramCache]: Analyzing trace with hash 746808533, now seen corresponding path program 202 times [2021-05-03 14:06:26,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:26,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224827762] [2021-05-03 14:06:26,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:26,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:26,349 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:26,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224827762] [2021-05-03 14:06:26,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796236353] [2021-05-03 14:06:26,350 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 [2021-05-03 14:06:26,369 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:06:26,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:26,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:06:26,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:26,412 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 37 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:26,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:26,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-05-03 14:06:26,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402672286] [2021-05-03 14:06:26,412 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-03 14:06:26,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:26,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-03 14:06:26,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-05-03 14:06:26,413 INFO L87 Difference]: Start difference. First operand 10207 states and 33096 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) [2021-05-03 14:06:26,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:26,514 INFO L93 Difference]: Finished difference Result 10562 states and 33685 transitions. [2021-05-03 14:06:26,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:06:26,514 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 21 [2021-05-03 14:06:26,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:26,531 INFO L225 Difference]: With dead ends: 10562 [2021-05-03 14:06:26,532 INFO L226 Difference]: Without dead ends: 10562 [2021-05-03 14:06:26,532 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 56.7ms TimeCoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:06:26,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10562 states. [2021-05-03 14:06:26,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10562 to 10217. [2021-05-03 14:06:26,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10217 states, 10216 states have (on average 3.2434416601409555) internal successors, (33135), 10216 states have internal predecessors, (33135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:26,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10217 states to 10217 states and 33135 transitions. [2021-05-03 14:06:26,690 INFO L78 Accepts]: Start accepts. Automaton has 10217 states and 33135 transitions. Word has length 21 [2021-05-03 14:06:26,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:26,690 INFO L480 AbstractCegarLoop]: Abstraction has 10217 states and 33135 transitions. [2021-05-03 14:06:26,690 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) [2021-05-03 14:06:26,690 INFO L276 IsEmpty]: Start isEmpty. Operand 10217 states and 33135 transitions. [2021-05-03 14:06:26,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:26,696 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:26,696 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:26,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3400,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:26,896 INFO L428 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:26,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:26,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1808066453, now seen corresponding path program 203 times [2021-05-03 14:06:26,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:26,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252218106] [2021-05-03 14:06:26,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:26,958 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 39 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:26,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252218106] [2021-05-03 14:06:26,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385751115] [2021-05-03 14:06:26,958 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 [2021-05-03 14:06:26,979 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:06:26,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:26,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:26,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:27,021 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:06:27,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:27,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 13 [2021-05-03 14:06:27,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068073166] [2021-05-03 14:06:27,022 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:06:27,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:27,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:06:27,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:06:27,023 INFO L87 Difference]: Start difference. First operand 10217 states and 33135 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) [2021-05-03 14:06:27,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:27,133 INFO L93 Difference]: Finished difference Result 10501 states and 33539 transitions. [2021-05-03 14:06:27,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-03 14:06:27,134 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 21 [2021-05-03 14:06:27,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:27,151 INFO L225 Difference]: With dead ends: 10501 [2021-05-03 14:06:27,151 INFO L226 Difference]: Without dead ends: 10501 [2021-05-03 14:06:27,151 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:27,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10501 states. [2021-05-03 14:06:27,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10501 to 10216. [2021-05-03 14:06:27,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 3.243171806167401) internal successors, (33129), 10215 states have internal predecessors, (33129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:27,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 33129 transitions. [2021-05-03 14:06:27,312 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 33129 transitions. Word has length 21 [2021-05-03 14:06:27,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:27,312 INFO L480 AbstractCegarLoop]: Abstraction has 10216 states and 33129 transitions. [2021-05-03 14:06:27,312 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) [2021-05-03 14:06:27,312 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 33129 transitions. [2021-05-03 14:06:27,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:27,319 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:27,319 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:27,519 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3401,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:27,520 INFO L428 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:27,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:27,520 INFO L82 PathProgramCache]: Analyzing trace with hash -97453145, now seen corresponding path program 204 times [2021-05-03 14:06:27,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:27,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827941426] [2021-05-03 14:06:27,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:27,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:27,587 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 33 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:27,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827941426] [2021-05-03 14:06:27,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107756391] [2021-05-03 14:06:27,588 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 [2021-05-03 14:06:27,609 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:06:27,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:27,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:06:27,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:27,648 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 33 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:27,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:27,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:06:27,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905408376] [2021-05-03 14:06:27,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:06:27,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:27,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:06:27,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:06:27,649 INFO L87 Difference]: Start difference. First operand 10216 states and 33129 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) [2021-05-03 14:06:27,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:27,842 INFO L93 Difference]: Finished difference Result 10497 states and 33526 transitions. [2021-05-03 14:06:27,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:06:27,843 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 21 [2021-05-03 14:06:27,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:27,861 INFO L225 Difference]: With dead ends: 10497 [2021-05-03 14:06:27,861 INFO L226 Difference]: Without dead ends: 10495 [2021-05-03 14:06:27,861 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 121.9ms TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:06:27,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10495 states. [2021-05-03 14:06:27,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10495 to 10216. [2021-05-03 14:06:27,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 3.242094958394518) internal successors, (33118), 10215 states have internal predecessors, (33118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:28,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 33118 transitions. [2021-05-03 14:06:28,014 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 33118 transitions. Word has length 21 [2021-05-03 14:06:28,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:28,014 INFO L480 AbstractCegarLoop]: Abstraction has 10216 states and 33118 transitions. [2021-05-03 14:06:28,015 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) [2021-05-03 14:06:28,015 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 33118 transitions. [2021-05-03 14:06:28,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:28,021 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:28,021 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:28,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3402,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:28,221 INFO L428 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:28,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:28,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1391951851, now seen corresponding path program 205 times [2021-05-03 14:06:28,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:28,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426081247] [2021-05-03 14:06:28,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:28,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:28,282 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 29 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:28,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426081247] [2021-05-03 14:06:28,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866888649] [2021-05-03 14:06:28,282 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 [2021-05-03 14:06:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:28,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:28,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:28,344 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:28,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:28,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-03 14:06:28,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770495372] [2021-05-03 14:06:28,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:06:28,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:28,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:06:28,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:28,345 INFO L87 Difference]: Start difference. First operand 10216 states and 33118 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) [2021-05-03 14:06:28,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:28,550 INFO L93 Difference]: Finished difference Result 10502 states and 33522 transitions. [2021-05-03 14:06:28,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:06:28,551 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 21 [2021-05-03 14:06:28,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:28,567 INFO L225 Difference]: With dead ends: 10502 [2021-05-03 14:06:28,567 INFO L226 Difference]: Without dead ends: 10499 [2021-05-03 14:06:28,568 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 130.4ms TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:06:28,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10499 states. [2021-05-03 14:06:28,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10499 to 10216. [2021-05-03 14:06:28,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 3.2418991678903573) internal successors, (33116), 10215 states have internal predecessors, (33116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:28,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 33116 transitions. [2021-05-03 14:06:28,749 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 33116 transitions. Word has length 21 [2021-05-03 14:06:28,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:28,749 INFO L480 AbstractCegarLoop]: Abstraction has 10216 states and 33116 transitions. [2021-05-03 14:06:28,749 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) [2021-05-03 14:06:28,749 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 33116 transitions. [2021-05-03 14:06:28,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:28,755 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:28,755 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:28,955 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3403 [2021-05-03 14:06:28,956 INFO L428 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:28,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:28,956 INFO L82 PathProgramCache]: Analyzing trace with hash 318866471, now seen corresponding path program 206 times [2021-05-03 14:06:28,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:28,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096228275] [2021-05-03 14:06:28,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:28,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:29,020 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 27 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:29,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096228275] [2021-05-03 14:06:29,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292218397] [2021-05-03 14:06:29,020 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 [2021-05-03 14:06:29,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:06:29,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:29,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:29,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:29,081 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:29,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:29,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-03 14:06:29,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56575120] [2021-05-03 14:06:29,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:06:29,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:29,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:06:29,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:29,081 INFO L87 Difference]: Start difference. First operand 10216 states and 33116 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) [2021-05-03 14:06:29,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:29,259 INFO L93 Difference]: Finished difference Result 11892 states and 38186 transitions. [2021-05-03 14:06:29,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:06:29,260 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 21 [2021-05-03 14:06:29,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:29,279 INFO L225 Difference]: With dead ends: 11892 [2021-05-03 14:06:29,279 INFO L226 Difference]: Without dead ends: 11888 [2021-05-03 14:06:29,280 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 124.9ms TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:06:29,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11888 states. [2021-05-03 14:06:29,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11888 to 10216. [2021-05-03 14:06:29,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 3.2417033773861967) internal successors, (33114), 10215 states have internal predecessors, (33114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:29,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 33114 transitions. [2021-05-03 14:06:29,443 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 33114 transitions. Word has length 21 [2021-05-03 14:06:29,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:29,443 INFO L480 AbstractCegarLoop]: Abstraction has 10216 states and 33114 transitions. [2021-05-03 14:06:29,443 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) [2021-05-03 14:06:29,443 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 33114 transitions. [2021-05-03 14:06:29,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:29,449 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:29,449 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:29,649 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3404,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:29,650 INFO L428 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:29,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:29,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1412958059, now seen corresponding path program 207 times [2021-05-03 14:06:29,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:29,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256583236] [2021-05-03 14:06:29,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:29,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:29,728 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:29,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256583236] [2021-05-03 14:06:29,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212114919] [2021-05-03 14:06:29,728 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 [2021-05-03 14:06:29,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:06:29,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:29,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:06:29,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:29,793 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 26 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:29,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:29,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:06:29,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864688105] [2021-05-03 14:06:29,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:06:29,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:29,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:06:29,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:29,794 INFO L87 Difference]: Start difference. First operand 10216 states and 33114 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) [2021-05-03 14:06:29,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:29,963 INFO L93 Difference]: Finished difference Result 11434 states and 36626 transitions. [2021-05-03 14:06:29,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:06:29,963 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 21 [2021-05-03 14:06:29,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:29,980 INFO L225 Difference]: With dead ends: 11434 [2021-05-03 14:06:29,981 INFO L226 Difference]: Without dead ends: 11429 [2021-05-03 14:06:29,981 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 135.9ms TimeCoverageRelationStatistics Valid=173, Invalid=379, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:06:29,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11429 states. [2021-05-03 14:06:30,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11429 to 10216. [2021-05-03 14:06:30,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 3.241507586882036) internal successors, (33112), 10215 states have internal predecessors, (33112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:30,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 33112 transitions. [2021-05-03 14:06:30,131 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 33112 transitions. Word has length 21 [2021-05-03 14:06:30,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:30,131 INFO L480 AbstractCegarLoop]: Abstraction has 10216 states and 33112 transitions. [2021-05-03 14:06:30,131 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) [2021-05-03 14:06:30,131 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 33112 transitions. [2021-05-03 14:06:30,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:30,137 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:30,137 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:30,338 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3405 [2021-05-03 14:06:30,339 INFO L428 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:30,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:30,339 INFO L82 PathProgramCache]: Analyzing trace with hash 970058919, now seen corresponding path program 208 times [2021-05-03 14:06:30,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:30,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610811151] [2021-05-03 14:06:30,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:30,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:30,414 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 28 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:30,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610811151] [2021-05-03 14:06:30,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305153592] [2021-05-03 14:06:30,415 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 [2021-05-03 14:06:30,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:06:30,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:30,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:30,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:30,476 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:30,476 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:30,476 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-03 14:06:30,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990131710] [2021-05-03 14:06:30,476 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:30,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:30,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:30,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:30,477 INFO L87 Difference]: Start difference. First operand 10216 states and 33112 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) [2021-05-03 14:06:30,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:30,680 INFO L93 Difference]: Finished difference Result 11458 states and 36660 transitions. [2021-05-03 14:06:30,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:06:30,681 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 21 [2021-05-03 14:06:30,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:30,700 INFO L225 Difference]: With dead ends: 11458 [2021-05-03 14:06:30,700 INFO L226 Difference]: Without dead ends: 11452 [2021-05-03 14:06:30,700 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 145.5ms TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:06:30,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11452 states. [2021-05-03 14:06:30,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11452 to 10313. [2021-05-03 14:06:30,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10313 states, 10312 states have (on average 3.2438906128782) internal successors, (33451), 10312 states have internal predecessors, (33451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:30,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10313 states to 10313 states and 33451 transitions. [2021-05-03 14:06:30,870 INFO L78 Accepts]: Start accepts. Automaton has 10313 states and 33451 transitions. Word has length 21 [2021-05-03 14:06:30,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:30,870 INFO L480 AbstractCegarLoop]: Abstraction has 10313 states and 33451 transitions. [2021-05-03 14:06:30,870 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) [2021-05-03 14:06:30,870 INFO L276 IsEmpty]: Start isEmpty. Operand 10313 states and 33451 transitions. [2021-05-03 14:06:30,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:30,876 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:30,877 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:31,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3406 [2021-05-03 14:06:31,077 INFO L428 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:31,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:31,077 INFO L82 PathProgramCache]: Analyzing trace with hash 125087467, now seen corresponding path program 209 times [2021-05-03 14:06:31,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:31,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352621602] [2021-05-03 14:06:31,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:31,156 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:31,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352621602] [2021-05-03 14:06:31,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275532567] [2021-05-03 14:06:31,156 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 [2021-05-03 14:06:31,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:06:31,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:31,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:31,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:31,220 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:31,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:31,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-03 14:06:31,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954430981] [2021-05-03 14:06:31,220 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:31,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:31,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:31,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:31,221 INFO L87 Difference]: Start difference. First operand 10313 states and 33451 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) [2021-05-03 14:06:31,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:31,402 INFO L93 Difference]: Finished difference Result 10600 states and 34163 transitions. [2021-05-03 14:06:31,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:06:31,403 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 21 [2021-05-03 14:06:31,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:31,418 INFO L225 Difference]: With dead ends: 10600 [2021-05-03 14:06:31,419 INFO L226 Difference]: Without dead ends: 10594 [2021-05-03 14:06:31,419 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 148.2ms TimeCoverageRelationStatistics Valid=201, Invalid=449, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:06:31,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10594 states. [2021-05-03 14:06:31,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10594 to 10313. [2021-05-03 14:06:31,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10313 states, 10312 states have (on average 3.2437936384794415) internal successors, (33450), 10312 states have internal predecessors, (33450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:31,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10313 states to 10313 states and 33450 transitions. [2021-05-03 14:06:31,622 INFO L78 Accepts]: Start accepts. Automaton has 10313 states and 33450 transitions. Word has length 21 [2021-05-03 14:06:31,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:31,622 INFO L480 AbstractCegarLoop]: Abstraction has 10313 states and 33450 transitions. [2021-05-03 14:06:31,622 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) [2021-05-03 14:06:31,622 INFO L276 IsEmpty]: Start isEmpty. Operand 10313 states and 33450 transitions. [2021-05-03 14:06:31,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:31,628 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:31,629 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:31,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3407,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:31,829 INFO L428 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:31,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:31,829 INFO L82 PathProgramCache]: Analyzing trace with hash -299223769, now seen corresponding path program 210 times [2021-05-03 14:06:31,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:31,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517348038] [2021-05-03 14:06:31,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:31,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:31,917 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:31,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517348038] [2021-05-03 14:06:31,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482626908] [2021-05-03 14:06:31,917 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 [2021-05-03 14:06:31,938 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:06:31,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:31,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:06:31,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:31,984 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:31,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:31,984 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:06:31,984 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892251536] [2021-05-03 14:06:31,984 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:31,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:31,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:31,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:31,985 INFO L87 Difference]: Start difference. First operand 10313 states and 33450 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-05-03 14:06:32,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:32,143 INFO L93 Difference]: Finished difference Result 10577 states and 34108 transitions. [2021-05-03 14:06:32,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:06:32,144 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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 21 [2021-05-03 14:06:32,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:32,159 INFO L225 Difference]: With dead ends: 10577 [2021-05-03 14:06:32,159 INFO L226 Difference]: Without dead ends: 10570 [2021-05-03 14:06:32,160 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 154.9ms TimeCoverageRelationStatistics Valid=202, Invalid=448, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:06:32,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10570 states. [2021-05-03 14:06:32,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10570 to 10313. [2021-05-03 14:06:32,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10313 states, 10312 states have (on average 3.243696664080683) internal successors, (33449), 10312 states have internal predecessors, (33449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:32,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10313 states to 10313 states and 33449 transitions. [2021-05-03 14:06:32,304 INFO L78 Accepts]: Start accepts. Automaton has 10313 states and 33449 transitions. Word has length 21 [2021-05-03 14:06:32,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:32,304 INFO L480 AbstractCegarLoop]: Abstraction has 10313 states and 33449 transitions. [2021-05-03 14:06:32,304 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 15 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) [2021-05-03 14:06:32,304 INFO L276 IsEmpty]: Start isEmpty. Operand 10313 states and 33449 transitions. [2021-05-03 14:06:32,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:32,310 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:32,310 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:32,511 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3408 [2021-05-03 14:06:32,511 INFO L428 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:32,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:32,511 INFO L82 PathProgramCache]: Analyzing trace with hash -567970197, now seen corresponding path program 211 times [2021-05-03 14:06:32,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:32,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816422113] [2021-05-03 14:06:32,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:32,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:32,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816422113] [2021-05-03 14:06:32,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146956168] [2021-05-03 14:06:32,601 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 [2021-05-03 14:06:32,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:32,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:32,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:32,664 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:32,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:32,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-03 14:06:32,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635646144] [2021-05-03 14:06:32,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:32,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:32,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:32,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:32,665 INFO L87 Difference]: Start difference. First operand 10313 states and 33449 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) [2021-05-03 14:06:32,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:32,827 INFO L93 Difference]: Finished difference Result 10543 states and 34047 transitions. [2021-05-03 14:06:32,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-03 14:06:32,828 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 21 [2021-05-03 14:06:32,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:32,844 INFO L225 Difference]: With dead ends: 10543 [2021-05-03 14:06:32,844 INFO L226 Difference]: Without dead ends: 10535 [2021-05-03 14:06:32,844 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 164.4ms TimeCoverageRelationStatistics Valid=205, Invalid=445, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:06:32,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10535 states. [2021-05-03 14:06:32,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10535 to 10313. [2021-05-03 14:06:32,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10313 states, 10312 states have (on average 3.243599689681924) internal successors, (33448), 10312 states have internal predecessors, (33448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:32,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10313 states to 10313 states and 33448 transitions. [2021-05-03 14:06:32,996 INFO L78 Accepts]: Start accepts. Automaton has 10313 states and 33448 transitions. Word has length 21 [2021-05-03 14:06:32,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:32,996 INFO L480 AbstractCegarLoop]: Abstraction has 10313 states and 33448 transitions. [2021-05-03 14:06:32,996 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) [2021-05-03 14:06:32,996 INFO L276 IsEmpty]: Start isEmpty. Operand 10313 states and 33448 transitions. [2021-05-03 14:06:33,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:33,002 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:33,003 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:33,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3409,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:33,203 INFO L428 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:33,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:33,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1673725717, now seen corresponding path program 212 times [2021-05-03 14:06:33,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:33,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148305656] [2021-05-03 14:06:33,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:33,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:33,276 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:33,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148305656] [2021-05-03 14:06:33,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543207015] [2021-05-03 14:06:33,276 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 [2021-05-03 14:06:33,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:06:33,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:33,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:06:33,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:33,339 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:33,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:33,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-05-03 14:06:33,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636135050] [2021-05-03 14:06:33,339 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:06:33,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:33,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:06:33,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:33,340 INFO L87 Difference]: Start difference. First operand 10313 states and 33448 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) [2021-05-03 14:06:33,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:33,513 INFO L93 Difference]: Finished difference Result 10708 states and 34397 transitions. [2021-05-03 14:06:33,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-03 14:06:33,514 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 21 [2021-05-03 14:06:33,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:33,533 INFO L225 Difference]: With dead ends: 10708 [2021-05-03 14:06:33,533 INFO L226 Difference]: Without dead ends: 10708 [2021-05-03 14:06:33,533 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 114.4ms TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2021-05-03 14:06:33,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10708 states. [2021-05-03 14:06:33,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10708 to 10467. [2021-05-03 14:06:33,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10467 states, 10466 states have (on average 3.2501433212306514) internal successors, (34016), 10466 states have internal predecessors, (34016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:33,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10467 states to 10467 states and 34016 transitions. [2021-05-03 14:06:33,710 INFO L78 Accepts]: Start accepts. Automaton has 10467 states and 34016 transitions. Word has length 21 [2021-05-03 14:06:33,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:33,710 INFO L480 AbstractCegarLoop]: Abstraction has 10467 states and 34016 transitions. [2021-05-03 14:06:33,710 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) [2021-05-03 14:06:33,710 INFO L276 IsEmpty]: Start isEmpty. Operand 10467 states and 34016 transitions. [2021-05-03 14:06:33,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:33,717 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:33,717 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:33,917 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3410,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:33,917 INFO L428 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:33,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:33,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1547961357, now seen corresponding path program 213 times [2021-05-03 14:06:33,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:33,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501006630] [2021-05-03 14:06:33,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:33,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:33,988 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:33,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501006630] [2021-05-03 14:06:33,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590282448] [2021-05-03 14:06:33,989 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 [2021-05-03 14:06:34,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-05-03 14:06:34,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:34,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:06:34,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:34,057 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:34,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:34,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:06:34,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962857160] [2021-05-03 14:06:34,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:34,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:34,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:34,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:34,058 INFO L87 Difference]: Start difference. First operand 10467 states and 34016 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) [2021-05-03 14:06:34,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:34,262 INFO L93 Difference]: Finished difference Result 10785 states and 34763 transitions. [2021-05-03 14:06:34,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:06:34,263 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 21 [2021-05-03 14:06:34,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:34,281 INFO L225 Difference]: With dead ends: 10785 [2021-05-03 14:06:34,281 INFO L226 Difference]: Without dead ends: 10778 [2021-05-03 14:06:34,281 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 149.9ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:06:34,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10778 states. [2021-05-03 14:06:34,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10778 to 10467. [2021-05-03 14:06:34,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10467 states, 10466 states have (on average 3.2500477737435505) internal successors, (34015), 10466 states have internal predecessors, (34015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:34,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10467 states to 10467 states and 34015 transitions. [2021-05-03 14:06:34,454 INFO L78 Accepts]: Start accepts. Automaton has 10467 states and 34015 transitions. Word has length 21 [2021-05-03 14:06:34,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:34,454 INFO L480 AbstractCegarLoop]: Abstraction has 10467 states and 34015 transitions. [2021-05-03 14:06:34,454 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) [2021-05-03 14:06:34,454 INFO L276 IsEmpty]: Start isEmpty. Operand 10467 states and 34015 transitions. [2021-05-03 14:06:34,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:34,460 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:34,461 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:34,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3411,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:34,661 INFO L428 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:34,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:34,661 INFO L82 PathProgramCache]: Analyzing trace with hash 196402649, now seen corresponding path program 214 times [2021-05-03 14:06:34,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:34,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975207457] [2021-05-03 14:06:34,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:34,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:34,732 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:34,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975207457] [2021-05-03 14:06:34,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680143618] [2021-05-03 14:06:34,732 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 [2021-05-03 14:06:34,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:06:34,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:34,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:34,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:34,796 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:34,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:34,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-03 14:06:34,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486514436] [2021-05-03 14:06:34,797 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:34,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:34,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:34,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:34,797 INFO L87 Difference]: Start difference. First operand 10467 states and 34015 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) [2021-05-03 14:06:35,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:35,046 INFO L93 Difference]: Finished difference Result 11060 states and 35467 transitions. [2021-05-03 14:06:35,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:06:35,046 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 21 [2021-05-03 14:06:35,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:35,067 INFO L225 Difference]: With dead ends: 11060 [2021-05-03 14:06:35,067 INFO L226 Difference]: Without dead ends: 11053 [2021-05-03 14:06:35,068 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 152.5ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:06:35,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11053 states. [2021-05-03 14:06:35,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11053 to 10479. [2021-05-03 14:06:35,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10479 states, 10478 states have (on average 3.2499522809696506) internal successors, (34053), 10478 states have internal predecessors, (34053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:35,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10479 states to 10479 states and 34053 transitions. [2021-05-03 14:06:35,269 INFO L78 Accepts]: Start accepts. Automaton has 10479 states and 34053 transitions. Word has length 21 [2021-05-03 14:06:35,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:35,269 INFO L480 AbstractCegarLoop]: Abstraction has 10479 states and 34053 transitions. [2021-05-03 14:06:35,269 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) [2021-05-03 14:06:35,269 INFO L276 IsEmpty]: Start isEmpty. Operand 10479 states and 34053 transitions. [2021-05-03 14:06:35,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:35,275 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:35,275 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:35,476 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3412,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:35,476 INFO L428 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:35,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:35,476 INFO L82 PathProgramCache]: Analyzing trace with hash -227908587, now seen corresponding path program 215 times [2021-05-03 14:06:35,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:35,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349992285] [2021-05-03 14:06:35,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:35,558 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 39 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:35,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349992285] [2021-05-03 14:06:35,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768494749] [2021-05-03 14:06:35,558 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 [2021-05-03 14:06:35,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:06:35,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:35,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:35,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:35,629 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:35,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:35,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-03 14:06:35,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586850495] [2021-05-03 14:06:35,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:35,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:35,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:35,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:35,630 INFO L87 Difference]: Start difference. First operand 10479 states and 34053 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) [2021-05-03 14:06:35,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:35,826 INFO L93 Difference]: Finished difference Result 10685 states and 34579 transitions. [2021-05-03 14:06:35,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:06:35,827 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 21 [2021-05-03 14:06:35,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:35,844 INFO L225 Difference]: With dead ends: 10685 [2021-05-03 14:06:35,844 INFO L226 Difference]: Without dead ends: 10678 [2021-05-03 14:06:35,844 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 169.3ms TimeCoverageRelationStatistics Valid=226, Invalid=476, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:06:35,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10678 states. [2021-05-03 14:06:35,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10678 to 10479. [2021-05-03 14:06:35,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10479 states, 10478 states have (on average 3.2498568429089523) internal successors, (34052), 10478 states have internal predecessors, (34052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:36,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10479 states to 10479 states and 34052 transitions. [2021-05-03 14:06:36,021 INFO L78 Accepts]: Start accepts. Automaton has 10479 states and 34052 transitions. Word has length 21 [2021-05-03 14:06:36,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:36,021 INFO L480 AbstractCegarLoop]: Abstraction has 10479 states and 34052 transitions. [2021-05-03 14:06:36,021 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) [2021-05-03 14:06:36,021 INFO L276 IsEmpty]: Start isEmpty. Operand 10479 states and 34052 transitions. [2021-05-03 14:06:36,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:36,028 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:36,028 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:36,228 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3413 [2021-05-03 14:06:36,228 INFO L428 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:36,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:36,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1562888013, now seen corresponding path program 216 times [2021-05-03 14:06:36,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:36,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568774389] [2021-05-03 14:06:36,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:36,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:36,298 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:36,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568774389] [2021-05-03 14:06:36,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153977549] [2021-05-03 14:06:36,299 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 [2021-05-03 14:06:36,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:06:36,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:36,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:36,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:36,365 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:36,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:36,365 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-03 14:06:36,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777018698] [2021-05-03 14:06:36,365 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:36,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:36,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:36,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:36,366 INFO L87 Difference]: Start difference. First operand 10479 states and 34052 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) [2021-05-03 14:06:36,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:36,564 INFO L93 Difference]: Finished difference Result 11317 states and 36210 transitions. [2021-05-03 14:06:36,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:06:36,564 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 21 [2021-05-03 14:06:36,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:36,584 INFO L225 Difference]: With dead ends: 11317 [2021-05-03 14:06:36,584 INFO L226 Difference]: Without dead ends: 11310 [2021-05-03 14:06:36,584 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:06:36,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11310 states. [2021-05-03 14:06:36,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11310 to 10494. [2021-05-03 14:06:36,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10494 states, 10493 states have (on average 3.2499761745925855) internal successors, (34102), 10493 states have internal predecessors, (34102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:36,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10494 states to 10494 states and 34102 transitions. [2021-05-03 14:06:36,765 INFO L78 Accepts]: Start accepts. Automaton has 10494 states and 34102 transitions. Word has length 21 [2021-05-03 14:06:36,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:36,766 INFO L480 AbstractCegarLoop]: Abstraction has 10494 states and 34102 transitions. [2021-05-03 14:06:36,766 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) [2021-05-03 14:06:36,766 INFO L276 IsEmpty]: Start isEmpty. Operand 10494 states and 34102 transitions. [2021-05-03 14:06:36,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:36,772 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:36,772 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:36,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3414,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:36,973 INFO L428 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:36,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:36,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1987199249, now seen corresponding path program 217 times [2021-05-03 14:06:36,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:36,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887017150] [2021-05-03 14:06:36,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:36,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:37,048 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 38 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:37,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887017150] [2021-05-03 14:06:37,049 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752422270] [2021-05-03 14:06:37,049 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 [2021-05-03 14:06:37,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:37,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:37,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:37,112 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 39 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:37,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:37,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-03 14:06:37,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960621633] [2021-05-03 14:06:37,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:37,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:37,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:37,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:37,113 INFO L87 Difference]: Start difference. First operand 10494 states and 34102 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) [2021-05-03 14:06:37,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:37,303 INFO L93 Difference]: Finished difference Result 10745 states and 34721 transitions. [2021-05-03 14:06:37,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:06:37,304 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 21 [2021-05-03 14:06:37,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:37,320 INFO L225 Difference]: With dead ends: 10745 [2021-05-03 14:06:37,320 INFO L226 Difference]: Without dead ends: 10738 [2021-05-03 14:06:37,320 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 154.9ms TimeCoverageRelationStatistics Valid=226, Invalid=476, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:06:37,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10738 states. [2021-05-03 14:06:37,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10738 to 10494. [2021-05-03 14:06:37,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10494 states, 10493 states have (on average 3.249880872962928) internal successors, (34101), 10493 states have internal predecessors, (34101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:37,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10494 states to 10494 states and 34101 transitions. [2021-05-03 14:06:37,474 INFO L78 Accepts]: Start accepts. Automaton has 10494 states and 34101 transitions. Word has length 21 [2021-05-03 14:06:37,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:37,474 INFO L480 AbstractCegarLoop]: Abstraction has 10494 states and 34101 transitions. [2021-05-03 14:06:37,474 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) [2021-05-03 14:06:37,474 INFO L276 IsEmpty]: Start isEmpty. Operand 10494 states and 34101 transitions. [2021-05-03 14:06:37,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:37,481 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:37,481 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:37,681 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3415 [2021-05-03 14:06:37,681 INFO L428 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:37,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:37,682 INFO L82 PathProgramCache]: Analyzing trace with hash 2039021619, now seen corresponding path program 218 times [2021-05-03 14:06:37,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:37,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003409805] [2021-05-03 14:06:37,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:37,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:37,762 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:37,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003409805] [2021-05-03 14:06:37,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458688067] [2021-05-03 14:06:37,763 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 [2021-05-03 14:06:37,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:06:37,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:37,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:37,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:37,827 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:37,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:37,828 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-03 14:06:37,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544604703] [2021-05-03 14:06:37,828 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:37,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:37,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:37,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:37,828 INFO L87 Difference]: Start difference. First operand 10494 states and 34101 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) [2021-05-03 14:06:38,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:38,009 INFO L93 Difference]: Finished difference Result 10713 states and 34665 transitions. [2021-05-03 14:06:38,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:06:38,010 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 21 [2021-05-03 14:06:38,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:38,027 INFO L225 Difference]: With dead ends: 10713 [2021-05-03 14:06:38,027 INFO L226 Difference]: Without dead ends: 10705 [2021-05-03 14:06:38,027 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 164.9ms TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:06:38,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10705 states. [2021-05-03 14:06:38,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10705 to 10494. [2021-05-03 14:06:38,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10494 states, 10493 states have (on average 3.2497855713332697) internal successors, (34100), 10493 states have internal predecessors, (34100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:38,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10494 states to 10494 states and 34100 transitions. [2021-05-03 14:06:38,184 INFO L78 Accepts]: Start accepts. Automaton has 10494 states and 34100 transitions. Word has length 21 [2021-05-03 14:06:38,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:38,184 INFO L480 AbstractCegarLoop]: Abstraction has 10494 states and 34100 transitions. [2021-05-03 14:06:38,184 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) [2021-05-03 14:06:38,184 INFO L276 IsEmpty]: Start isEmpty. Operand 10494 states and 34100 transitions. [2021-05-03 14:06:38,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:38,190 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:38,190 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:38,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3416,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:38,391 INFO L428 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:38,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:38,391 INFO L82 PathProgramCache]: Analyzing trace with hash 355397379, now seen corresponding path program 219 times [2021-05-03 14:06:38,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:38,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913896714] [2021-05-03 14:06:38,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:38,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:38,451 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:38,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913896714] [2021-05-03 14:06:38,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610941775] [2021-05-03 14:06:38,451 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 [2021-05-03 14:06:38,472 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:06:38,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:38,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:06:38,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:38,514 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 45 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:38,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:38,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:06:38,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064850536] [2021-05-03 14:06:38,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:06:38,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:38,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:06:38,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=103, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:06:38,515 INFO L87 Difference]: Start difference. First operand 10494 states and 34100 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) [2021-05-03 14:06:38,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:38,631 INFO L93 Difference]: Finished difference Result 12763 states and 41190 transitions. [2021-05-03 14:06:38,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:06:38,632 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 21 [2021-05-03 14:06:38,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:38,654 INFO L225 Difference]: With dead ends: 12763 [2021-05-03 14:06:38,654 INFO L226 Difference]: Without dead ends: 12763 [2021-05-03 14:06:38,655 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=92, Invalid=118, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:38,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12763 states. [2021-05-03 14:06:38,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12763 to 12391. [2021-05-03 14:06:38,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12391 states, 12390 states have (on average 3.2764326069410816) internal successors, (40595), 12390 states have internal predecessors, (40595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:38,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12391 states to 12391 states and 40595 transitions. [2021-05-03 14:06:38,891 INFO L78 Accepts]: Start accepts. Automaton has 12391 states and 40595 transitions. Word has length 21 [2021-05-03 14:06:38,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:38,891 INFO L480 AbstractCegarLoop]: Abstraction has 12391 states and 40595 transitions. [2021-05-03 14:06:38,891 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) [2021-05-03 14:06:38,892 INFO L276 IsEmpty]: Start isEmpty. Operand 12391 states and 40595 transitions. [2021-05-03 14:06:38,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:38,900 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:38,900 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:39,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3417,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:39,101 INFO L428 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:39,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:39,102 INFO L82 PathProgramCache]: Analyzing trace with hash 2095489689, now seen corresponding path program 220 times [2021-05-03 14:06:39,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:39,102 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045267495] [2021-05-03 14:06:39,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:39,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:39,160 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 47 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:39,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045267495] [2021-05-03 14:06:39,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838146443] [2021-05-03 14:06:39,161 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 [2021-05-03 14:06:39,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:06:39,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:39,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:39,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:39,220 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:39,221 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:39,221 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 14 [2021-05-03 14:06:39,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113926060] [2021-05-03 14:06:39,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:06:39,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:39,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:06:39,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:39,221 INFO L87 Difference]: Start difference. First operand 12391 states and 40595 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) [2021-05-03 14:06:39,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:39,341 INFO L93 Difference]: Finished difference Result 12700 states and 41042 transitions. [2021-05-03 14:06:39,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:06:39,342 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 21 [2021-05-03 14:06:39,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:39,363 INFO L225 Difference]: With dead ends: 12700 [2021-05-03 14:06:39,363 INFO L226 Difference]: Without dead ends: 12700 [2021-05-03 14:06:39,363 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 58.5ms TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:39,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12700 states. [2021-05-03 14:06:39,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12700 to 12390. [2021-05-03 14:06:39,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12390 states, 12389 states have (on average 3.276293486157075) internal successors, (40590), 12389 states have internal predecessors, (40590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:39,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12390 states to 12390 states and 40590 transitions. [2021-05-03 14:06:39,574 INFO L78 Accepts]: Start accepts. Automaton has 12390 states and 40590 transitions. Word has length 21 [2021-05-03 14:06:39,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:39,574 INFO L480 AbstractCegarLoop]: Abstraction has 12390 states and 40590 transitions. [2021-05-03 14:06:39,574 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) [2021-05-03 14:06:39,574 INFO L276 IsEmpty]: Start isEmpty. Operand 12390 states and 40590 transitions. [2021-05-03 14:06:39,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:39,582 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:39,582 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:39,783 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3418 [2021-05-03 14:06:39,783 INFO L428 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:39,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:39,783 INFO L82 PathProgramCache]: Analyzing trace with hash -488864299, now seen corresponding path program 221 times [2021-05-03 14:06:39,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:39,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767665797] [2021-05-03 14:06:39,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:39,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:39,842 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:39,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767665797] [2021-05-03 14:06:39,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056739655] [2021-05-03 14:06:39,842 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 [2021-05-03 14:06:39,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-05-03 14:06:39,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:39,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:06:39,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:39,902 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:39,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:39,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-05-03 14:06:39,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553396873] [2021-05-03 14:06:39,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-03 14:06:39,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:39,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-03 14:06:39,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=111, Unknown=0, NotChecked=0, Total=182 [2021-05-03 14:06:39,903 INFO L87 Difference]: Start difference. First operand 12390 states and 40590 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) [2021-05-03 14:06:40,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:40,085 INFO L93 Difference]: Finished difference Result 12712 states and 41072 transitions. [2021-05-03 14:06:40,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:06:40,086 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 21 [2021-05-03 14:06:40,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:40,108 INFO L225 Difference]: With dead ends: 12712 [2021-05-03 14:06:40,108 INFO L226 Difference]: Without dead ends: 12710 [2021-05-03 14:06:40,108 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 109.7ms TimeCoverageRelationStatistics Valid=179, Invalid=327, Unknown=0, NotChecked=0, Total=506 [2021-05-03 14:06:40,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12710 states. [2021-05-03 14:06:40,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12710 to 12390. [2021-05-03 14:06:40,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12390 states, 12389 states have (on average 3.2761320526273305) internal successors, (40588), 12389 states have internal predecessors, (40588), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:40,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12390 states to 12390 states and 40588 transitions. [2021-05-03 14:06:40,321 INFO L78 Accepts]: Start accepts. Automaton has 12390 states and 40588 transitions. Word has length 21 [2021-05-03 14:06:40,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:40,321 INFO L480 AbstractCegarLoop]: Abstraction has 12390 states and 40588 transitions. [2021-05-03 14:06:40,321 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) [2021-05-03 14:06:40,321 INFO L276 IsEmpty]: Start isEmpty. Operand 12390 states and 40588 transitions. [2021-05-03 14:06:40,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:40,329 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:40,330 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:40,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3419,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:40,530 INFO L428 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:40,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:40,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1000540697, now seen corresponding path program 222 times [2021-05-03 14:06:40,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:40,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916095707] [2021-05-03 14:06:40,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:40,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:40,585 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:40,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916095707] [2021-05-03 14:06:40,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63099951] [2021-05-03 14:06:40,585 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 [2021-05-03 14:06:40,606 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-05-03 14:06:40,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:40,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:40,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:40,650 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 41 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:40,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:40,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-03 14:06:40,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847398113] [2021-05-03 14:06:40,650 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:06:40,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:40,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:06:40,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:40,650 INFO L87 Difference]: Start difference. First operand 12390 states and 40588 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) [2021-05-03 14:06:40,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:40,850 INFO L93 Difference]: Finished difference Result 12717 states and 41077 transitions. [2021-05-03 14:06:40,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-03 14:06:40,851 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 21 [2021-05-03 14:06:40,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:40,874 INFO L225 Difference]: With dead ends: 12717 [2021-05-03 14:06:40,875 INFO L226 Difference]: Without dead ends: 12714 [2021-05-03 14:06:40,875 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 122.2ms TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:06:40,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12714 states. [2021-05-03 14:06:41,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12714 to 12399. [2021-05-03 14:06:41,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12399 states, 12398 states have (on average 3.2764962090659786) internal successors, (40622), 12398 states have internal predecessors, (40622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:41,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12399 states to 12399 states and 40622 transitions. [2021-05-03 14:06:41,083 INFO L78 Accepts]: Start accepts. Automaton has 12399 states and 40622 transitions. Word has length 21 [2021-05-03 14:06:41,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:41,083 INFO L480 AbstractCegarLoop]: Abstraction has 12399 states and 40622 transitions. [2021-05-03 14:06:41,083 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) [2021-05-03 14:06:41,083 INFO L276 IsEmpty]: Start isEmpty. Operand 12399 states and 40622 transitions. [2021-05-03 14:06:41,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:41,091 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:41,091 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:41,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3420,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:41,292 INFO L428 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:41,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:41,292 INFO L82 PathProgramCache]: Analyzing trace with hash -72544683, now seen corresponding path program 223 times [2021-05-03 14:06:41,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:41,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975537616] [2021-05-03 14:06:41,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:41,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:41,355 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 32 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:41,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975537616] [2021-05-03 14:06:41,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886920119] [2021-05-03 14:06:41,355 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 [2021-05-03 14:06:41,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:41,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:41,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:41,418 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 37 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:41,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:41,419 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-03 14:06:41,419 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742056402] [2021-05-03 14:06:41,419 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:06:41,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:41,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:06:41,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:41,419 INFO L87 Difference]: Start difference. First operand 12399 states and 40622 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) [2021-05-03 14:06:41,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:41,623 INFO L93 Difference]: Finished difference Result 14561 states and 47167 transitions. [2021-05-03 14:06:41,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-03 14:06:41,623 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 21 [2021-05-03 14:06:41,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:41,647 INFO L225 Difference]: With dead ends: 14561 [2021-05-03 14:06:41,647 INFO L226 Difference]: Without dead ends: 14557 [2021-05-03 14:06:41,647 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 128.8ms TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:06:41,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14557 states. [2021-05-03 14:06:41,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14557 to 12399. [2021-05-03 14:06:41,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12399 states, 12398 states have (on average 3.276415550895306) internal successors, (40621), 12398 states have internal predecessors, (40621), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:41,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12399 states to 12399 states and 40621 transitions. [2021-05-03 14:06:41,850 INFO L78 Accepts]: Start accepts. Automaton has 12399 states and 40621 transitions. Word has length 21 [2021-05-03 14:06:41,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:41,850 INFO L480 AbstractCegarLoop]: Abstraction has 12399 states and 40621 transitions. [2021-05-03 14:06:41,850 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) [2021-05-03 14:06:41,850 INFO L276 IsEmpty]: Start isEmpty. Operand 12399 states and 40621 transitions. [2021-05-03 14:06:41,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:41,858 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:41,858 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:42,058 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3421,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:42,058 INFO L428 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:42,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:42,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1021546905, now seen corresponding path program 224 times [2021-05-03 14:06:42,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:42,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044875136] [2021-05-03 14:06:42,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:42,120 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:42,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044875136] [2021-05-03 14:06:42,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37300848] [2021-05-03 14:06:42,120 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 [2021-05-03 14:06:42,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:06:42,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:42,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:42,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:42,183 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:42,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:42,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 14 [2021-05-03 14:06:42,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762703632] [2021-05-03 14:06:42,183 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:06:42,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:42,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:06:42,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:42,184 INFO L87 Difference]: Start difference. First operand 12399 states and 40621 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) [2021-05-03 14:06:42,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:42,426 INFO L93 Difference]: Finished difference Result 14191 states and 45981 transitions. [2021-05-03 14:06:42,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:06:42,427 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 21 [2021-05-03 14:06:42,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:42,452 INFO L225 Difference]: With dead ends: 14191 [2021-05-03 14:06:42,453 INFO L226 Difference]: Without dead ends: 14186 [2021-05-03 14:06:42,453 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 127.9ms TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:06:42,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14186 states. [2021-05-03 14:06:42,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14186 to 12399. [2021-05-03 14:06:42,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12399 states, 12398 states have (on average 3.276334892724633) internal successors, (40620), 12398 states have internal predecessors, (40620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:42,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12399 states to 12399 states and 40620 transitions. [2021-05-03 14:06:42,673 INFO L78 Accepts]: Start accepts. Automaton has 12399 states and 40620 transitions. Word has length 21 [2021-05-03 14:06:42,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:42,673 INFO L480 AbstractCegarLoop]: Abstraction has 12399 states and 40620 transitions. [2021-05-03 14:06:42,673 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) [2021-05-03 14:06:42,673 INFO L276 IsEmpty]: Start isEmpty. Operand 12399 states and 40620 transitions. [2021-05-03 14:06:42,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:42,682 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:42,682 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:42,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3422,226 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:42,883 INFO L428 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:42,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:42,883 INFO L82 PathProgramCache]: Analyzing trace with hash 578647765, now seen corresponding path program 225 times [2021-05-03 14:06:42,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:42,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781833559] [2021-05-03 14:06:42,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:42,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:42,948 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:42,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781833559] [2021-05-03 14:06:42,948 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209246302] [2021-05-03 14:06:42,948 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 [2021-05-03 14:06:42,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-03 14:06:42,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:42,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:06:42,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:43,014 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 31 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:43,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:43,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-05-03 14:06:43,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945689970] [2021-05-03 14:06:43,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-03 14:06:43,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:43,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-03 14:06:43,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-05-03 14:06:43,015 INFO L87 Difference]: Start difference. First operand 12399 states and 40620 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) [2021-05-03 14:06:43,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:43,201 INFO L93 Difference]: Finished difference Result 13610 states and 44018 transitions. [2021-05-03 14:06:43,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:06:43,202 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 21 [2021-05-03 14:06:43,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:43,224 INFO L225 Difference]: With dead ends: 13610 [2021-05-03 14:06:43,224 INFO L226 Difference]: Without dead ends: 13604 [2021-05-03 14:06:43,224 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 130.0ms TimeCoverageRelationStatistics Valid=193, Invalid=407, Unknown=0, NotChecked=0, Total=600 [2021-05-03 14:06:43,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13604 states. [2021-05-03 14:06:43,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13604 to 12399. [2021-05-03 14:06:43,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12399 states, 12398 states have (on average 3.2762542345539605) internal successors, (40619), 12398 states have internal predecessors, (40619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:43,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12399 states to 12399 states and 40619 transitions. [2021-05-03 14:06:43,415 INFO L78 Accepts]: Start accepts. Automaton has 12399 states and 40619 transitions. Word has length 21 [2021-05-03 14:06:43,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:43,415 INFO L480 AbstractCegarLoop]: Abstraction has 12399 states and 40619 transitions. [2021-05-03 14:06:43,415 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) [2021-05-03 14:06:43,415 INFO L276 IsEmpty]: Start isEmpty. Operand 12399 states and 40619 transitions. [2021-05-03 14:06:43,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:43,422 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:43,422 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:43,622 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3423,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:43,623 INFO L428 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:43,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:43,623 INFO L82 PathProgramCache]: Analyzing trace with hash -266323687, now seen corresponding path program 226 times [2021-05-03 14:06:43,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:43,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814358722] [2021-05-03 14:06:43,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:43,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:43,695 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 34 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:43,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814358722] [2021-05-03 14:06:43,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244415627] [2021-05-03 14:06:43,695 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 [2021-05-03 14:06:43,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:06:43,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:43,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:43,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:43,757 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 36 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:43,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:43,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-03 14:06:43,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449298820] [2021-05-03 14:06:43,758 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:43,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:43,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:43,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:43,758 INFO L87 Difference]: Start difference. First operand 12399 states and 40619 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) [2021-05-03 14:06:43,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:43,970 INFO L93 Difference]: Finished difference Result 13653 states and 44081 transitions. [2021-05-03 14:06:43,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-03 14:06:43,971 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 21 [2021-05-03 14:06:43,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:43,997 INFO L225 Difference]: With dead ends: 13653 [2021-05-03 14:06:43,997 INFO L226 Difference]: Without dead ends: 13646 [2021-05-03 14:06:43,997 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 147.0ms TimeCoverageRelationStatistics Valid=225, Invalid=477, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:06:44,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13646 states. [2021-05-03 14:06:44,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13646 to 12454. [2021-05-03 14:06:44,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12454 states, 12453 states have (on average 3.2765598650927488) internal successors, (40803), 12453 states have internal predecessors, (40803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:44,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12454 states to 12454 states and 40803 transitions. [2021-05-03 14:06:44,213 INFO L78 Accepts]: Start accepts. Automaton has 12454 states and 40803 transitions. Word has length 21 [2021-05-03 14:06:44,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:44,214 INFO L480 AbstractCegarLoop]: Abstraction has 12454 states and 40803 transitions. [2021-05-03 14:06:44,214 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) [2021-05-03 14:06:44,214 INFO L276 IsEmpty]: Start isEmpty. Operand 12454 states and 40803 transitions. [2021-05-03 14:06:44,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:44,222 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:44,222 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:44,422 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3424,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:44,422 INFO L428 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:44,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:44,422 INFO L82 PathProgramCache]: Analyzing trace with hash -690634923, now seen corresponding path program 227 times [2021-05-03 14:06:44,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:44,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023007540] [2021-05-03 14:06:44,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:44,499 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 39 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:44,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023007540] [2021-05-03 14:06:44,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036322136] [2021-05-03 14:06:44,499 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 [2021-05-03 14:06:44,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-05-03 14:06:44,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:44,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:44,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:44,570 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:44,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:44,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-03 14:06:44,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599137824] [2021-05-03 14:06:44,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:44,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:44,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:44,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:44,571 INFO L87 Difference]: Start difference. First operand 12454 states and 40803 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) [2021-05-03 14:06:44,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:44,750 INFO L93 Difference]: Finished difference Result 12749 states and 41539 transitions. [2021-05-03 14:06:44,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-03 14:06:44,751 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 21 [2021-05-03 14:06:44,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:44,770 INFO L225 Difference]: With dead ends: 12749 [2021-05-03 14:06:44,770 INFO L226 Difference]: Without dead ends: 12742 [2021-05-03 14:06:44,771 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 150.6ms TimeCoverageRelationStatistics Valid=226, Invalid=476, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:06:44,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12742 states. [2021-05-03 14:06:44,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12742 to 12454. [2021-05-03 14:06:44,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12454 states, 12453 states have (on average 3.276479563157472) internal successors, (40802), 12453 states have internal predecessors, (40802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:44,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12454 states to 12454 states and 40802 transitions. [2021-05-03 14:06:44,955 INFO L78 Accepts]: Start accepts. Automaton has 12454 states and 40802 transitions. Word has length 21 [2021-05-03 14:06:44,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:44,955 INFO L480 AbstractCegarLoop]: Abstraction has 12454 states and 40802 transitions. [2021-05-03 14:06:44,955 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) [2021-05-03 14:06:44,955 INFO L276 IsEmpty]: Start isEmpty. Operand 12454 states and 40802 transitions. [2021-05-03 14:06:44,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:44,962 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:44,962 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:45,162 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3425 [2021-05-03 14:06:45,163 INFO L428 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:45,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:45,163 INFO L82 PathProgramCache]: Analyzing trace with hash -959381351, now seen corresponding path program 228 times [2021-05-03 14:06:45,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:45,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863250586] [2021-05-03 14:06:45,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:45,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:45,245 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:45,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863250586] [2021-05-03 14:06:45,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520713001] [2021-05-03 14:06:45,246 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 [2021-05-03 14:06:45,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-05-03 14:06:45,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:45,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 14 conjunts are in the unsatisfiable core [2021-05-03 14:06:45,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:45,313 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 46 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:45,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:45,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-05-03 14:06:45,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580087225] [2021-05-03 14:06:45,313 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:45,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:45,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:45,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:45,314 INFO L87 Difference]: Start difference. First operand 12454 states and 40802 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) [2021-05-03 14:06:45,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:45,500 INFO L93 Difference]: Finished difference Result 12726 states and 41484 transitions. [2021-05-03 14:06:45,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-03 14:06:45,501 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 21 [2021-05-03 14:06:45,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:45,523 INFO L225 Difference]: With dead ends: 12726 [2021-05-03 14:06:45,523 INFO L226 Difference]: Without dead ends: 12718 [2021-05-03 14:06:45,523 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 161.9ms TimeCoverageRelationStatistics Valid=229, Invalid=473, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:06:45,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12718 states. [2021-05-03 14:06:45,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12718 to 12454. [2021-05-03 14:06:45,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12454 states, 12453 states have (on average 3.2763992612221955) internal successors, (40801), 12453 states have internal predecessors, (40801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:45,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12454 states to 12454 states and 40801 transitions. [2021-05-03 14:06:45,793 INFO L78 Accepts]: Start accepts. Automaton has 12454 states and 40801 transitions. Word has length 21 [2021-05-03 14:06:45,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:45,794 INFO L480 AbstractCegarLoop]: Abstraction has 12454 states and 40801 transitions. [2021-05-03 14:06:45,794 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) [2021-05-03 14:06:45,794 INFO L276 IsEmpty]: Start isEmpty. Operand 12454 states and 40801 transitions. [2021-05-03 14:06:45,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-05-03 14:06:45,802 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:45,802 INFO L551 BasicCegarLoop]: trace histogram [10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:46,002 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3426,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:46,002 INFO L428 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:46,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:46,003 INFO L82 PathProgramCache]: Analyzing trace with hash -700586027, now seen corresponding path program 229 times [2021-05-03 14:06:46,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:46,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8996669] [2021-05-03 14:06:46,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:46,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:46,089 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 55 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:46,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8996669] [2021-05-03 14:06:46,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939334665] [2021-05-03 14:06:46,090 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 [2021-05-03 14:06:46,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:46,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 13 conjunts are in the unsatisfiable core [2021-05-03 14:06:46,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:46,168 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 54 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:06:46,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:46,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 15 [2021-05-03 14:06:46,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512048613] [2021-05-03 14:06:46,169 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-03 14:06:46,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:46,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-03 14:06:46,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-05-03 14:06:46,170 INFO L87 Difference]: Start difference. First operand 12454 states and 40801 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) [2021-05-03 14:06:46,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:46,355 INFO L93 Difference]: Finished difference Result 12691 states and 41422 transitions. [2021-05-03 14:06:46,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-03 14:06:46,355 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 21 [2021-05-03 14:06:46,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:46,374 INFO L225 Difference]: With dead ends: 12691 [2021-05-03 14:06:46,374 INFO L226 Difference]: Without dead ends: 12682 [2021-05-03 14:06:46,375 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 169.9ms TimeCoverageRelationStatistics Valid=234, Invalid=468, Unknown=0, NotChecked=0, Total=702 [2021-05-03 14:06:46,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12682 states. [2021-05-03 14:06:46,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12682 to 12454. [2021-05-03 14:06:46,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12454 states, 12453 states have (on average 3.2763189592869186) internal successors, (40800), 12453 states have internal predecessors, (40800), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:46,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12454 states to 12454 states and 40800 transitions. [2021-05-03 14:06:46,545 INFO L78 Accepts]: Start accepts. Automaton has 12454 states and 40800 transitions. Word has length 21 [2021-05-03 14:06:46,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:46,546 INFO L480 AbstractCegarLoop]: Abstraction has 12454 states and 40800 transitions. [2021-05-03 14:06:46,546 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) [2021-05-03 14:06:46,546 INFO L276 IsEmpty]: Start isEmpty. Operand 12454 states and 40800 transitions. [2021-05-03 14:06:46,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-03 14:06:46,552 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:46,553 INFO L551 BasicCegarLoop]: trace histogram [10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:46,753 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3427 [2021-05-03 14:06:46,753 INFO L428 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:46,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:46,753 INFO L82 PathProgramCache]: Analyzing trace with hash 655261526, now seen corresponding path program 230 times [2021-05-03 14:06:46,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:46,754 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362850678] [2021-05-03 14:06:46,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:46,903 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-03 14:06:46,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362850678] [2021-05-03 14:06:46,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849562098] [2021-05-03 14:06:46,904 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 [2021-05-03 14:06:46,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:06:46,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:46,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 22 conjunts are in the unsatisfiable core [2021-05-03 14:06:46,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:47,097 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-03 14:06:47,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:47,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2021-05-03 14:06:47,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068843345] [2021-05-03 14:06:47,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-03 14:06:47,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:47,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-03 14:06:47,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:06:47,098 INFO L87 Difference]: Start difference. First operand 12454 states and 40800 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 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) [2021-05-03 14:06:47,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:47,315 INFO L93 Difference]: Finished difference Result 16028 states and 51289 transitions. [2021-05-03 14:06:47,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-03 14:06:47,316 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 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 [2021-05-03 14:06:47,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:47,344 INFO L225 Difference]: With dead ends: 16028 [2021-05-03 14:06:47,345 INFO L226 Difference]: Without dead ends: 16028 [2021-05-03 14:06:47,345 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 262.4ms TimeCoverageRelationStatistics Valid=51, Invalid=411, Unknown=0, NotChecked=0, Total=462 [2021-05-03 14:06:47,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16028 states. [2021-05-03 14:06:47,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16028 to 12891. [2021-05-03 14:06:47,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12891 states, 12890 states have (on average 3.2592707525213345) internal successors, (42012), 12890 states have internal predecessors, (42012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:47,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12891 states to 12891 states and 42012 transitions. [2021-05-03 14:06:47,574 INFO L78 Accepts]: Start accepts. Automaton has 12891 states and 42012 transitions. Word has length 22 [2021-05-03 14:06:47,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:47,574 INFO L480 AbstractCegarLoop]: Abstraction has 12891 states and 42012 transitions. [2021-05-03 14:06:47,574 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 21 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) [2021-05-03 14:06:47,574 INFO L276 IsEmpty]: Start isEmpty. Operand 12891 states and 42012 transitions. [2021-05-03 14:06:47,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-05-03 14:06:47,584 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:47,584 INFO L551 BasicCegarLoop]: trace histogram [11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:47,784 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3428,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:06:47,784 INFO L428 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:47,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:47,785 INFO L82 PathProgramCache]: Analyzing trace with hash -548365066, now seen corresponding path program 231 times [2021-05-03 14:06:47,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:47,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390419457] [2021-05-03 14:06:47,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:47,993 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-03 14:06:47,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390419457] [2021-05-03 14:06:47,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536328673] [2021-05-03 14:06:47,994 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 [2021-05-03 14:06:48,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-05-03 14:06:48,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:48,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 25 conjunts are in the unsatisfiable core [2021-05-03 14:06:48,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:48,222 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-05-03 14:06:48,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:06:48,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-05-03 14:06:48,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641077942] [2021-05-03 14:06:48,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-03 14:06:48,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:06:48,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-03 14:06:48,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2021-05-03 14:06:48,223 INFO L87 Difference]: Start difference. First operand 12891 states and 42012 transitions. Second operand has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 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) [2021-05-03 14:06:48,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:06:48,480 INFO L93 Difference]: Finished difference Result 17733 states and 56311 transitions. [2021-05-03 14:06:48,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-03 14:06:48,481 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 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 23 [2021-05-03 14:06:48,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:06:48,512 INFO L225 Difference]: With dead ends: 17733 [2021-05-03 14:06:48,512 INFO L226 Difference]: Without dead ends: 17728 [2021-05-03 14:06:48,512 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 357.7ms TimeCoverageRelationStatistics Valid=66, Invalid=584, Unknown=0, NotChecked=0, Total=650 [2021-05-03 14:06:48,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17728 states. [2021-05-03 14:06:48,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17728 to 13517. [2021-05-03 14:06:48,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13517 states, 13516 states have (on average 3.222033145901154) internal successors, (43549), 13516 states have internal predecessors, (43549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:06:48,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13517 states to 13517 states and 43549 transitions. [2021-05-03 14:06:48,760 INFO L78 Accepts]: Start accepts. Automaton has 13517 states and 43549 transitions. Word has length 23 [2021-05-03 14:06:48,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:06:48,760 INFO L480 AbstractCegarLoop]: Abstraction has 13517 states and 43549 transitions. [2021-05-03 14:06:48,760 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 23 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) [2021-05-03 14:06:48,760 INFO L276 IsEmpty]: Start isEmpty. Operand 13517 states and 43549 transitions. [2021-05-03 14:06:48,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:06:48,771 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:06:48,771 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:06:48,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3429 [2021-05-03 14:06:48,972 INFO L428 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:06:48,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:06:48,972 INFO L82 PathProgramCache]: Analyzing trace with hash 793916246, now seen corresponding path program 232 times [2021-05-03 14:06:48,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:06:48,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082342316] [2021-05-03 14:06:48,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:06:48,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:06:49,074 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:06:49,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082342316] [2021-05-03 14:06:49,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507524211] [2021-05-03 14:06:49,074 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 [2021-05-03 14:06:49,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:06:49,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:06:49,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 14:06:49,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:06:49,765 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2021-05-03 14:06:49,766 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:06:49,766 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-05-03 14:06:51,989 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 1638 DAG size of output: 1292 [2021-05-03 14:06:53,188 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 1021 DAG size of output: 858 [2021-05-03 14:06:54,671 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 601 DAG size of output: 523 [2021-05-03 14:06:54,999 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 2034 DAG size of output: 1651 [2021-05-03 14:06:55,268 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 3473 DAG size of output: 2737 [2021-05-03 14:06:55,552 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 3473 DAG size of output: 2737 [2021-05-03 14:06:55,937 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 3492 DAG size of output: 2756 [2021-05-03 14:06:56,454 WARN L205 SmtUtils]: Spent 496.00 ms on a formula simplification. DAG size of input: 2758 DAG size of output: 3679 [2021-05-03 14:06:56,786 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification that was a NOOP. DAG size: 2552 [2021-05-03 14:06:56,896 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 1209 DAG size of output: 1223 [2021-05-03 14:06:59,283 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 472 DAG size of output: 503 [2021-05-03 14:07:01,185 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 846 DAG size of output: 837 [2021-05-03 14:07:01,295 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 946 DAG size of output: 1096 [2021-05-03 14:07:01,413 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 1052 DAG size of output: 1043 [2021-05-03 14:07:01,613 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 1725 DAG size of output: 1619 [2021-05-03 14:07:01,827 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 1739 DAG size of output: 1628 [2021-05-03 14:07:02,374 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 306 DAG size of output: 306 [2021-05-03 14:07:03,984 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 1276 DAG size of output: 1173 [2021-05-03 14:07:04,103 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 1289 DAG size of output: 1181 [2021-05-03 14:07:04,256 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 1556 DAG size of output: 1523 [2021-05-03 14:07:04,419 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 1773 DAG size of output: 1455 [2021-05-03 14:07:04,673 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 2870 DAG size of output: 1855 [2021-05-03 14:07:05,134 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 287 DAG size of output: 322 [2021-05-03 14:07:07,046 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 1022 DAG size of output: 964 [2021-05-03 14:07:07,266 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 1222 DAG size of output: 1146 [2021-05-03 14:07:07,419 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 1530 DAG size of output: 1512 [2021-05-03 14:07:07,591 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 1547 DAG size of output: 1524 [2021-05-03 14:07:07,768 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 1820 DAG size of output: 1458 [2021-05-03 14:07:09,157 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 570 DAG size of output: 532 [2021-05-03 14:07:09,688 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 2388 DAG size of output: 1818 [2021-05-03 14:07:10,214 WARN L205 SmtUtils]: Spent 510.00 ms on a formula simplification. DAG size of input: 4904 DAG size of output: 3134 [2021-05-03 14:07:10,874 WARN L205 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 4940 DAG size of output: 3174 [2021-05-03 14:07:11,035 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 1538 DAG size of output: 1552 [2021-05-03 14:07:11,292 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 1532 DAG size of output: 2482 [2021-05-03 14:07:11,518 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 1397 DAG size of output: 1834 [2021-05-03 14:07:11,637 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1331 DAG size of output: 1330 [2021-05-03 14:07:11,747 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 782 DAG size of output: 994 [2021-05-03 14:07:14,453 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 1662 DAG size of output: 1363 [2021-05-03 14:07:15,665 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 2300 DAG size of output: 1851 [2021-05-03 14:07:15,904 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 2363 DAG size of output: 1905 [2021-05-03 14:07:16,182 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 2726 DAG size of output: 2229 [2021-05-03 14:07:16,518 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 2737 DAG size of output: 2236 [2021-05-03 14:07:16,849 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 3069 DAG size of output: 2582 [2021-05-03 14:07:19,419 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 1614 DAG size of output: 1284 [2021-05-03 14:07:19,615 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 2048 DAG size of output: 1621 [2021-05-03 14:07:19,843 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 2477 DAG size of output: 2092 [2021-05-03 14:07:20,084 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 2493 DAG size of output: 2103 [2021-05-03 14:07:20,722 WARN L205 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 5158 DAG size of output: 4297 [2021-05-03 14:07:21,352 WARN L205 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 5959 DAG size of output: 4172 [2021-05-03 14:07:21,604 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 1525 DAG size of output: 2024 [2021-05-03 14:07:21,726 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 1459 DAG size of output: 1458 [2021-05-03 14:07:21,900 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 834 DAG size of output: 1083 [2021-05-03 14:07:22,018 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 827 DAG size of output: 1070 [2021-05-03 14:07:24,667 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 1221 DAG size of output: 1101 [2021-05-03 14:07:27,000 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 1832 DAG size of output: 1638 [2021-05-03 14:07:27,296 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 2296 DAG size of output: 2045 [2021-05-03 14:07:27,594 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 2583 DAG size of output: 2455 [2021-05-03 14:07:27,912 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 2598 DAG size of output: 2465 [2021-05-03 14:07:32,744 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 1787 DAG size of output: 1475 [2021-05-03 14:07:32,923 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 1799 DAG size of output: 1483 [2021-05-03 14:07:33,160 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 2263 DAG size of output: 2046 [2021-05-03 14:07:33,451 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 2664 DAG size of output: 2392 [2021-05-03 14:07:33,844 WARN L205 SmtUtils]: Spent 377.00 ms on a formula simplification. DAG size of input: 3070 DAG size of output: 2767 [2021-05-03 14:07:34,517 WARN L205 SmtUtils]: Spent 654.00 ms on a formula simplification. DAG size of input: 5343 DAG size of output: 4709 [2021-05-03 14:07:35,243 WARN L205 SmtUtils]: Spent 694.00 ms on a formula simplification. DAG size of input: 5998 DAG size of output: 4595 [2021-05-03 14:07:36,300 WARN L205 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 11190 DAG size of output: 5719 [2021-05-03 14:07:37,414 WARN L205 SmtUtils]: Spent 1.07 s on a formula simplification. DAG size of input: 11226 DAG size of output: 5758 [2021-05-03 14:07:39,103 WARN L205 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 15533 DAG size of output: 8496 [2021-05-03 14:07:39,448 WARN L205 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 2647 DAG size of output: 2679 [2021-05-03 14:07:39,976 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 2641 DAG size of output: 4138 [2021-05-03 14:07:40,506 WARN L205 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 2295 DAG size of output: 2826 [2021-05-03 14:07:40,744 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 2259 DAG size of output: 2258 [2021-05-03 14:07:40,876 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 1366 [2021-05-03 14:07:42,410 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 898 DAG size of output: 714 [2021-05-03 14:07:44,465 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 1380 DAG size of output: 1149 [2021-05-03 14:07:44,735 WARN L205 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 2034 DAG size of output: 1747 [2021-05-03 14:07:44,966 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 2094 DAG size of output: 1794 [2021-05-03 14:07:45,228 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 2318 DAG size of output: 2004 [2021-05-03 14:07:45,533 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 2686 DAG size of output: 2289 [2021-05-03 14:07:45,855 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 2701 DAG size of output: 2300 [2021-05-03 14:07:45,974 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 746 DAG size of output: 958 [2021-05-03 14:07:46,097 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 741 DAG size of output: 997 [2021-05-03 14:07:48,409 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 1527 DAG size of output: 1171 [2021-05-03 14:07:48,635 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 1987 DAG size of output: 1552 [2021-05-03 14:07:48,856 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 2325 DAG size of output: 1902 [2021-05-03 14:07:49,406 WARN L205 SmtUtils]: Spent 535.00 ms on a formula simplification. DAG size of input: 4792 DAG size of output: 3943 [2021-05-03 14:07:49,603 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 1175 DAG size of output: 1420 [2021-05-03 14:07:51,830 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 1420 DAG size of output: 1268 [2021-05-03 14:07:53,611 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 2515 DAG size of output: 2119 [2021-05-03 14:07:53,945 WARN L205 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 2977 DAG size of output: 2622 [2021-05-03 14:07:54,836 WARN L205 SmtUtils]: Spent 868.00 ms on a formula simplification. DAG size of input: 7318 DAG size of output: 6138 [2021-05-03 14:07:55,840 WARN L205 SmtUtils]: Spent 961.00 ms on a formula simplification. DAG size of input: 8735 DAG size of output: 6006 [2021-05-03 14:07:56,390 WARN L205 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 2538 DAG size of output: 3128 [2021-05-03 14:07:56,882 WARN L205 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 2504 DAG size of output: 3286 [2021-05-03 14:07:57,374 WARN L205 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 2482 DAG size of output: 3435 [2021-05-03 14:07:57,884 WARN L205 SmtUtils]: Spent 484.00 ms on a formula simplification. DAG size of input: 2478 DAG size of output: 3203 [2021-05-03 14:07:58,138 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 2472 DAG size of output: 2472 [2021-05-03 14:07:58,370 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 1280 DAG size of output: 1603 [2021-05-03 14:07:58,481 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 1277 [2021-05-03 14:08:04,929 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 2046 DAG size of output: 1220 [2021-05-03 14:08:05,177 WARN L205 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 1472 DAG size of output: 1924 [2021-05-03 14:08:05,310 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 1430 [2021-05-03 14:08:05,537 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 520 DAG size of output: 690 [2021-05-03 14:08:10,672 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 1881 DAG size of output: 1160 [2021-05-03 14:08:10,887 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 758 DAG size of output: 1041 [2021-05-03 14:08:15,314 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1772 DAG size of output: 1022 [2021-05-03 14:08:15,586 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 2892 DAG size of output: 1736 [2021-05-03 14:08:15,990 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 4666 DAG size of output: 2727 [2021-05-03 14:08:16,634 WARN L205 SmtUtils]: Spent 620.00 ms on a formula simplification. DAG size of input: 5929 DAG size of output: 4398 [2021-05-03 14:08:17,537 WARN L205 SmtUtils]: Spent 867.00 ms on a formula simplification. DAG size of input: 7205 DAG size of output: 5889 [2021-05-03 14:08:18,656 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 8212 DAG size of output: 6910 [2021-05-03 14:08:19,834 WARN L205 SmtUtils]: Spent 1.13 s on a formula simplification. DAG size of input: 9263 DAG size of output: 6781 [2021-05-03 14:08:21,498 WARN L205 SmtUtils]: Spent 1.61 s on a formula simplification. DAG size of input: 16365 DAG size of output: 8416 [2021-05-03 14:08:23,243 WARN L205 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 16417 DAG size of output: 8471 [2021-05-03 14:08:26,654 WARN L205 SmtUtils]: Spent 3.32 s on a formula simplification. DAG size of input: 26090 DAG size of output: 13572 [2021-05-03 14:08:30,187 WARN L205 SmtUtils]: Spent 3.41 s on a formula simplification. DAG size of input: 26090 DAG size of output: 13572 [2021-05-03 14:08:33,790 WARN L205 SmtUtils]: Spent 3.52 s on a formula simplification. DAG size of input: 26099 DAG size of output: 13581 [2021-05-03 14:08:36,882 WARN L205 SmtUtils]: Spent 2.99 s on a formula simplification. DAG size of input: 13583 DAG size of output: 13719 [2021-05-03 14:08:38,208 WARN L205 SmtUtils]: Spent 1.26 s on a formula simplification. DAG size of input: 5410 DAG size of output: 6613 [2021-05-03 14:08:38,816 WARN L205 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 4745 DAG size of output: 2684 [2021-05-03 14:08:39,298 WARN L205 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 1914 DAG size of output: 2212 [2021-05-03 14:08:39,459 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 1410 DAG size of output: 1302 [2021-05-03 14:08:39,588 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 783 DAG size of output: 1024 [2021-05-03 14:08:40,276 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 780 DAG size of output: 1031 [2021-05-03 14:08:41,487 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 719 DAG size of output: 811 [2021-05-03 14:08:44,399 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 1721 DAG size of output: 1119 [2021-05-03 14:08:44,703 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 2952 DAG size of output: 1734 [2021-05-03 14:08:44,887 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 1208 DAG size of output: 1115 [2021-05-03 14:08:45,059 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 917 DAG size of output: 1232 [2021-05-03 14:08:47,680 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 1580 DAG size of output: 949 [2021-05-03 14:08:48,625 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 1995 DAG size of output: 1129 [2021-05-03 14:08:49,057 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 4347 DAG size of output: 2528 [2021-05-03 14:08:49,582 WARN L205 SmtUtils]: Spent 504.00 ms on a formula simplification. DAG size of input: 5124 DAG size of output: 3021 [2021-05-03 14:08:50,251 WARN L205 SmtUtils]: Spent 639.00 ms on a formula simplification. DAG size of input: 2909 DAG size of output: 3206 [2021-05-03 14:08:50,421 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 1719 DAG size of output: 791 [2021-05-03 14:08:50,554 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 793 DAG size of output: 821 [2021-05-03 14:08:54,133 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 1555 DAG size of output: 1172 [2021-05-03 14:08:55,235 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 2000 DAG size of output: 1421 [2021-05-03 14:08:55,478 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 2000 DAG size of output: 1421 [2021-05-03 14:08:55,707 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 1951 DAG size of output: 839 [2021-05-03 14:08:55,836 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 841 DAG size of output: 782 [2021-05-03 14:08:56,539 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 649 DAG size of output: 841 [2021-05-03 14:08:58,768 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 1103 DAG size of output: 841 [2021-05-03 14:08:58,927 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 1419 DAG size of output: 1024 [2021-05-03 14:08:59,087 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 1419 DAG size of output: 1024 [2021-05-03 14:08:59,538 WARN L205 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 2986 DAG size of output: 2108 [2021-05-03 14:09:00,308 WARN L205 SmtUtils]: Spent 748.00 ms on a formula simplification. DAG size of input: 7615 DAG size of output: 3627 [2021-05-03 14:09:02,674 WARN L205 SmtUtils]: Spent 2.29 s on a formula simplification. DAG size of input: 9581 DAG size of output: 10699 [2021-05-03 14:09:03,864 WARN L205 SmtUtils]: Spent 1.08 s on a formula simplification. DAG size of input: 7234 DAG size of output: 4615 [2021-05-03 14:09:04,702 WARN L205 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 2653 DAG size of output: 3353 [2021-05-03 14:09:05,110 WARN L205 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 2489 DAG size of output: 2089 [2021-05-03 14:09:05,284 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 594 DAG size of output: 779 [2021-05-03 14:09:06,606 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 1735 DAG size of output: 1728 [2021-05-03 14:09:06,861 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 1257 DAG size of output: 1591 [2021-05-03 14:09:06,997 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 1253 DAG size of output: 1253 [2021-05-03 14:09:07,125 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 1234 [2021-05-03 14:09:08,493 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 1502 DAG size of output: 981 [2021-05-03 14:09:09,644 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 1944 DAG size of output: 1276 [2021-05-03 14:09:09,769 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 753 DAG size of output: 753 [2021-05-03 14:09:11,493 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 2819 DAG size of output: 1830 [2021-05-03 14:09:11,899 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 3486 DAG size of output: 2105 [2021-05-03 14:09:12,145 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 1262 DAG size of output: 1139 [2021-05-03 14:09:12,273 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 923 DAG size of output: 920 [2021-05-03 14:09:14,207 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 644 DAG size of output: 798 [2021-05-03 14:09:14,334 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 616 DAG size of output: 1016 [2021-05-03 14:09:16,546 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 1558 DAG size of output: 1002 [2021-05-03 14:09:16,812 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 2268 DAG size of output: 1507 [2021-05-03 14:09:18,444 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 2814 DAG size of output: 1745 [2021-05-03 14:09:19,188 WARN L205 SmtUtils]: Spent 727.00 ms on a formula simplification. DAG size of input: 5877 DAG size of output: 3455 [2021-05-03 14:09:20,102 WARN L205 SmtUtils]: Spent 882.00 ms on a formula simplification. DAG size of input: 7567 DAG size of output: 4263 [2021-05-03 14:09:21,390 WARN L205 SmtUtils]: Spent 1.23 s on a formula simplification. DAG size of input: 5600 DAG size of output: 6515 [2021-05-03 14:09:22,131 WARN L205 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 4846 DAG size of output: 3209 [2021-05-03 14:09:22,411 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 1906 DAG size of output: 1558 [2021-05-03 14:09:22,682 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 1305 DAG size of output: 1757 [2021-05-03 14:09:22,824 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 1296 [2021-05-03 14:09:24,552 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 1442 DAG size of output: 914 [2021-05-03 14:09:25,863 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 655 [2021-05-03 14:09:26,032 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 2102 DAG size of output: 1248 [2021-05-03 14:09:26,923 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 2533 DAG size of output: 1385 [2021-05-03 14:09:27,345 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 3729 DAG size of output: 2097 [2021-05-03 14:09:27,614 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 2348 DAG size of output: 960 [2021-05-03 14:09:27,757 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 962 DAG size of output: 809 [2021-05-03 14:09:30,139 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 1347 DAG size of output: 811 [2021-05-03 14:09:30,967 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 1709 DAG size of output: 937 [2021-05-03 14:09:31,127 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 1709 DAG size of output: 937 [2021-05-03 14:09:31,682 WARN L205 SmtUtils]: Spent 542.00 ms on a formula simplification. DAG size of input: 5099 DAG size of output: 2657 [2021-05-03 14:09:33,159 WARN L205 SmtUtils]: Spent 1.45 s on a formula simplification. DAG size of input: 11321 DAG size of output: 6137 [2021-05-03 14:09:35,516 WARN L205 SmtUtils]: Spent 2.30 s on a formula simplification. DAG size of input: 17534 DAG size of output: 8794 [2021-05-03 14:09:37,932 WARN L205 SmtUtils]: Spent 2.33 s on a formula simplification. DAG size of input: 17534 DAG size of output: 8794 [2021-05-03 14:09:40,401 WARN L205 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 17544 DAG size of output: 8800 [2021-05-03 14:09:42,372 WARN L205 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 8802 DAG size of output: 6883 [2021-05-03 14:09:43,322 WARN L205 SmtUtils]: Spent 904.00 ms on a formula simplification. DAG size of input: 4087 DAG size of output: 4537 [2021-05-03 14:09:43,749 WARN L205 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 3359 DAG size of output: 2401 [2021-05-03 14:09:44,572 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 783 DAG size of output: 1033 [2021-05-03 14:09:44,701 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 751 DAG size of output: 751 [2021-05-03 14:09:47,392 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 1632 DAG size of output: 1052 [2021-05-03 14:09:49,974 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 1398 DAG size of output: 729 [2021-05-03 14:09:50,113 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 1595 DAG size of output: 900 [2021-05-03 14:09:51,406 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 2284 DAG size of output: 1379 [2021-05-03 14:09:51,646 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 2362 DAG size of output: 1396 [2021-05-03 14:09:52,052 WARN L205 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 3520 DAG size of output: 1977 [2021-05-03 14:09:52,757 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 742 DAG size of output: 1062 [2021-05-03 14:09:56,317 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 1921 DAG size of output: 851 [2021-05-03 14:09:57,079 WARN L205 SmtUtils]: Spent 747.00 ms on a formula simplification. DAG size of input: 6251 DAG size of output: 3213 [2021-05-03 14:09:58,094 WARN L205 SmtUtils]: Spent 979.00 ms on a formula simplification. DAG size of input: 7549 DAG size of output: 3873 [2021-05-03 14:09:59,312 WARN L205 SmtUtils]: Spent 1.18 s on a formula simplification. DAG size of input: 10070 DAG size of output: 4216 [2021-05-03 14:10:00,474 WARN L205 SmtUtils]: Spent 1.12 s on a formula simplification. DAG size of input: 10070 DAG size of output: 4216 [2021-05-03 14:10:01,700 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 10076 DAG size of output: 4222 [2021-05-03 14:10:02,248 WARN L205 SmtUtils]: Spent 519.00 ms on a formula simplification. DAG size of input: 4224 DAG size of output: 2082 [2021-05-03 14:10:02,560 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 1920 DAG size of output: 1819 [2021-05-03 14:10:02,800 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 1803 DAG size of output: 1782 [2021-05-03 14:10:03,376 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 1553 DAG size of output: 1546 [2021-05-03 14:10:03,527 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 1489 DAG size of output: 821 [2021-05-03 14:10:05,096 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 768 DAG size of output: 918 [2021-05-03 14:10:06,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:10:06,051 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:06,051 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:10:06,052 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:3 [2021-05-03 14:10:06,057 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:10:06,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:10:06,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-05-03 14:10:06,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25573466] [2021-05-03 14:10:06,058 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 14:10:06,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:10:06,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 14:10:06,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:10:06,058 INFO L87 Difference]: Start difference. First operand 13517 states and 43549 transitions. Second operand has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:06,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:10:06,364 INFO L93 Difference]: Finished difference Result 13801 states and 44168 transitions. [2021-05-03 14:10:06,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:10:06,365 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have 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 [2021-05-03 14:10:06,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:10:06,386 INFO L225 Difference]: With dead ends: 13801 [2021-05-03 14:10:06,386 INFO L226 Difference]: Without dead ends: 13798 [2021-05-03 14:10:06,386 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 364.1ms TimeCoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:10:06,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13798 states. [2021-05-03 14:10:06,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13798 to 13640. [2021-05-03 14:10:06,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13640 states, 13639 states have (on average 3.22179045384559) internal successors, (43942), 13639 states have internal predecessors, (43942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:06,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13640 states to 13640 states and 43942 transitions. [2021-05-03 14:10:06,596 INFO L78 Accepts]: Start accepts. Automaton has 13640 states and 43942 transitions. Word has length 24 [2021-05-03 14:10:06,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:10:06,596 INFO L480 AbstractCegarLoop]: Abstraction has 13640 states and 43942 transitions. [2021-05-03 14:10:06,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.4666666666666666) internal successors, (44), 29 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:10:06,596 INFO L276 IsEmpty]: Start isEmpty. Operand 13640 states and 43942 transitions. [2021-05-03 14:10:06,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:10:06,607 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:10:06,607 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:10:06,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3430 [2021-05-03 14:10:06,811 INFO L428 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:10:06,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:10:06,811 INFO L82 PathProgramCache]: Analyzing trace with hash 802713344, now seen corresponding path program 233 times [2021-05-03 14:10:06,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:10:06,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593477576] [2021-05-03 14:10:06,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:10:06,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:10:06,911 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:10:06,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593477576] [2021-05-03 14:10:06,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493137086] [2021-05-03 14:10:06,911 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 [2021-05-03 14:10:06,937 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-05-03 14:10:06,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:10:06,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 14:10:06,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:10:07,639 WARN L205 SmtUtils]: Spent 353.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2021-05-03 14:10:07,640 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:10:07,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-05-03 14:10:11,368 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 2372 DAG size of output: 1768 [2021-05-03 14:10:11,553 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 2372 DAG size of output: 1768 [2021-05-03 14:10:11,830 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 2394 DAG size of output: 1790 [2021-05-03 14:10:11,975 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 1782 DAG size of output: 1774 [2021-05-03 14:10:12,169 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 1776 DAG size of output: 1879 [2021-05-03 14:10:12,345 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 1773 DAG size of output: 1791 [2021-05-03 14:10:12,493 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 1768 DAG size of output: 1768 [2021-05-03 14:10:13,820 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 650 DAG size of output: 663 [2021-05-03 14:10:16,130 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 1694 DAG size of output: 1131 [2021-05-03 14:10:16,255 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 1737 DAG size of output: 1175 [2021-05-03 14:10:16,441 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 2246 DAG size of output: 1463 [2021-05-03 14:10:16,663 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 1055 DAG size of output: 1370 [2021-05-03 14:10:18,422 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 637 DAG size of output: 451 [2021-05-03 14:10:20,005 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 1807 DAG size of output: 1239 [2021-05-03 14:10:20,192 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 2561 DAG size of output: 1548 [2021-05-03 14:10:20,396 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 2626 DAG size of output: 1613 [2021-05-03 14:10:20,885 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 4469 DAG size of output: 2679 [2021-05-03 14:10:21,306 WARN L205 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 4518 DAG size of output: 2724 [2021-05-03 14:10:21,749 WARN L205 SmtUtils]: Spent 421.00 ms on a formula simplification. DAG size of input: 4549 DAG size of output: 2749 [2021-05-03 14:10:22,260 WARN L205 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 4549 DAG size of output: 2749 [2021-05-03 14:10:22,971 WARN L205 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 4560 DAG size of output: 3263 [2021-05-03 14:10:23,340 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 2535 DAG size of output: 2376 [2021-05-03 14:10:23,528 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 1656 DAG size of output: 1457 [2021-05-03 14:10:23,778 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 1454 DAG size of output: 1895 [2021-05-03 14:10:24,045 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 1419 DAG size of output: 1604 [2021-05-03 14:10:24,168 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 1403 DAG size of output: 1401 [2021-05-03 14:10:24,326 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 1379 DAG size of output: 1475 [2021-05-03 14:10:24,467 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 1375 DAG size of output: 1390 [2021-05-03 14:10:24,581 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1360 DAG size of output: 1356 [2021-05-03 14:10:25,930 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 345 DAG size of output: 345 [2021-05-03 14:10:27,447 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 2149 DAG size of output: 869 [2021-05-03 14:10:27,626 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 2918 DAG size of output: 1198 [2021-05-03 14:10:27,804 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 2918 DAG size of output: 1198 [2021-05-03 14:10:28,066 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 2924 DAG size of output: 1204 [2021-05-03 14:10:28,217 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 1206 DAG size of output: 1223 [2021-05-03 14:10:28,374 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 1153 DAG size of output: 1369 [2021-05-03 14:10:30,006 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 423 DAG size of output: 294 [2021-05-03 14:10:30,844 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1387 DAG size of output: 866 [2021-05-03 14:10:32,164 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 826 DAG size of output: 629 [2021-05-03 14:10:32,435 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 2076 DAG size of output: 1306 [2021-05-03 14:10:32,638 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 2159 DAG size of output: 1362 [2021-05-03 14:10:34,156 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 415 DAG size of output: 499 [2021-05-03 14:10:35,823 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 1425 DAG size of output: 901 [2021-05-03 14:10:36,052 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 2035 DAG size of output: 1229 [2021-05-03 14:10:36,459 WARN L205 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 2135 DAG size of output: 1280 [2021-05-03 14:10:37,049 WARN L205 SmtUtils]: Spent 574.00 ms on a formula simplification. DAG size of input: 3612 DAG size of output: 2109 [2021-05-03 14:10:37,622 WARN L205 SmtUtils]: Spent 550.00 ms on a formula simplification. DAG size of input: 3756 DAG size of output: 2177 [2021-05-03 14:10:37,791 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 1051 DAG size of output: 1315 [2021-05-03 14:10:43,150 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 1688 DAG size of output: 1244 [2021-05-03 14:10:45,664 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 1456 DAG size of output: 987 [2021-05-03 14:10:46,927 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 833 DAG size of output: 612 [2021-05-03 14:10:47,112 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 2083 DAG size of output: 1372 [2021-05-03 14:10:47,446 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 3330 DAG size of output: 2098 [2021-05-03 14:10:47,881 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 4362 DAG size of output: 2671 [2021-05-03 14:10:48,371 WARN L205 SmtUtils]: Spent 467.00 ms on a formula simplification. DAG size of input: 4824 DAG size of output: 2898 [2021-05-03 14:10:49,313 WARN L205 SmtUtils]: Spent 912.00 ms on a formula simplification. DAG size of input: 7881 DAG size of output: 4334 [2021-05-03 14:10:50,318 WARN L205 SmtUtils]: Spent 966.00 ms on a formula simplification. DAG size of input: 8087 DAG size of output: 4543 [2021-05-03 14:10:51,284 WARN L205 SmtUtils]: Spent 928.00 ms on a formula simplification. DAG size of input: 8087 DAG size of output: 4543 [2021-05-03 14:10:52,339 WARN L205 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 8090 DAG size of output: 4527 [2021-05-03 14:10:52,964 WARN L205 SmtUtils]: Spent 605.00 ms on a formula simplification. DAG size of input: 4523 DAG size of output: 4400 [2021-05-03 14:10:53,905 WARN L205 SmtUtils]: Spent 905.00 ms on a formula simplification. DAG size of input: 4402 DAG size of output: 4688 [2021-05-03 14:10:54,347 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 2760 DAG size of output: 2375 [2021-05-03 14:10:54,542 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 1674 DAG size of output: 1559 [2021-05-03 14:10:54,822 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 1503 DAG size of output: 1502 [2021-05-03 14:10:54,969 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 1416 DAG size of output: 1416 [2021-05-03 14:10:56,756 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 1498 DAG size of output: 746 [2021-05-03 14:10:57,243 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 1671 DAG size of output: 806 [2021-05-03 14:10:57,715 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 2499 DAG size of output: 2090 [2021-05-03 14:10:57,880 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 1311 DAG size of output: 1300 [2021-05-03 14:10:58,011 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 1208 DAG size of output: 1208 [2021-05-03 14:10:58,137 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 1177 DAG size of output: 1177 [2021-05-03 14:10:59,554 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 1480 DAG size of output: 635 [2021-05-03 14:10:59,684 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 1093 DAG size of output: 539 [2021-05-03 14:11:00,085 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 1777 DAG size of output: 800 [2021-05-03 14:11:00,339 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 3145 DAG size of output: 1262 [2021-05-03 14:11:00,601 WARN L205 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 3145 DAG size of output: 1262 [2021-05-03 14:11:00,875 WARN L205 SmtUtils]: Spent 258.00 ms on a formula simplification. DAG size of input: 3149 DAG size of output: 1267 [2021-05-03 14:11:02,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:11:02,816 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:02,817 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:11:02,817 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:3 [2021-05-03 14:11:02,824 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:02,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:02,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-05-03 14:11:02,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798746052] [2021-05-03 14:11:02,824 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 14:11:02,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:02,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 14:11:02,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:11:02,825 INFO L87 Difference]: Start difference. First operand 13640 states and 43942 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-05-03 14:11:03,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:03,301 INFO L93 Difference]: Finished difference Result 14010 states and 44824 transitions. [2021-05-03 14:11:03,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:11:03,302 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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 [2021-05-03 14:11:03,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:03,328 INFO L225 Difference]: With dead ends: 14010 [2021-05-03 14:11:03,328 INFO L226 Difference]: Without dead ends: 14007 [2021-05-03 14:11:03,329 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 382.9ms TimeCoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:11:03,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14007 states. [2021-05-03 14:11:03,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14007 to 13806. [2021-05-03 14:11:03,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13806 states, 13805 states have (on average 3.2249185077870335) internal successors, (44520), 13805 states have internal predecessors, (44520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:03,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13806 states to 13806 states and 44520 transitions. [2021-05-03 14:11:03,560 INFO L78 Accepts]: Start accepts. Automaton has 13806 states and 44520 transitions. Word has length 24 [2021-05-03 14:11:03,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:03,560 INFO L480 AbstractCegarLoop]: Abstraction has 13806 states and 44520 transitions. [2021-05-03 14:11:03,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-05-03 14:11:03,560 INFO L276 IsEmpty]: Start isEmpty. Operand 13806 states and 44520 transitions. [2021-05-03 14:11:03,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:11:03,571 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:03,571 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:11:03,774 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32790,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:11:03,774 INFO L428 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:11:03,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:11:03,774 INFO L82 PathProgramCache]: Analyzing trace with hash -629300488, now seen corresponding path program 234 times [2021-05-03 14:11:03,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:11:03,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668326729] [2021-05-03 14:11:03,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:11:03,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:11:03,871 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:11:03,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668326729] [2021-05-03 14:11:03,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210942689] [2021-05-03 14:11:03,871 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 [2021-05-03 14:11:03,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-05-03 14:11:03,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:11:03,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 14:11:03,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:11:04,560 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2021-05-03 14:11:04,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:04,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-05-03 14:11:07,176 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 1885 DAG size of output: 918 [2021-05-03 14:11:07,307 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 1911 DAG size of output: 943 [2021-05-03 14:11:07,516 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 1911 DAG size of output: 943 [2021-05-03 14:11:07,652 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 1924 DAG size of output: 957 [2021-05-03 14:11:07,775 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 959 DAG size of output: 1017 [2021-05-03 14:11:09,649 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 970 DAG size of output: 771 [2021-05-03 14:11:09,773 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 1697 DAG size of output: 1125 [2021-05-03 14:11:09,903 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 1697 DAG size of output: 1125 [2021-05-03 14:11:10,036 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 1707 DAG size of output: 1135 [2021-05-03 14:11:10,197 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 1137 DAG size of output: 1336 [2021-05-03 14:11:11,439 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 747 DAG size of output: 600 [2021-05-03 14:11:12,871 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 839 DAG size of output: 684 [2021-05-03 14:11:13,053 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 1373 DAG size of output: 1011 [2021-05-03 14:11:13,311 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 1396 DAG size of output: 1028 [2021-05-03 14:11:14,544 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 1806 DAG size of output: 1363 [2021-05-03 14:11:16,436 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 931 DAG size of output: 797 [2021-05-03 14:11:16,920 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 2473 DAG size of output: 1978 [2021-05-03 14:11:17,036 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 788 DAG size of output: 929 [2021-05-03 14:11:18,750 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 459 DAG size of output: 376 [2021-05-03 14:11:19,297 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 1066 DAG size of output: 836 [2021-05-03 14:11:20,289 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 1331 DAG size of output: 1001 [2021-05-03 14:11:20,615 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 596 DAG size of output: 834 [2021-05-03 14:11:22,438 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 1207 DAG size of output: 955 [2021-05-03 14:11:23,509 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 1741 DAG size of output: 1264 [2021-05-03 14:11:25,097 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 999 DAG size of output: 630 [2021-05-03 14:11:25,409 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 2374 DAG size of output: 1590 [2021-05-03 14:11:25,732 WARN L205 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 2388 DAG size of output: 1600 [2021-05-03 14:11:26,349 WARN L205 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 3265 DAG size of output: 2312 [2021-05-03 14:11:27,347 WARN L205 SmtUtils]: Spent 976.00 ms on a formula simplification. DAG size of input: 5311 DAG size of output: 3930 [2021-05-03 14:11:28,439 WARN L205 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 5311 DAG size of output: 3930 [2021-05-03 14:11:29,567 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 5318 DAG size of output: 3937 [2021-05-03 14:11:30,526 WARN L205 SmtUtils]: Spent 928.00 ms on a formula simplification. DAG size of input: 3939 DAG size of output: 3258 [2021-05-03 14:11:31,256 WARN L205 SmtUtils]: Spent 704.00 ms on a formula simplification. DAG size of input: 3140 DAG size of output: 3099 [2021-05-03 14:11:31,493 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 1068 DAG size of output: 1075 [2021-05-03 14:11:31,680 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 1062 DAG size of output: 1031 [2021-05-03 14:11:31,917 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 980 DAG size of output: 1093 [2021-05-03 14:11:32,060 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 939 DAG size of output: 938 [2021-05-03 14:11:32,974 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 225 [2021-05-03 14:11:33,755 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 1760 DAG size of output: 1758 [2021-05-03 14:11:34,081 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 1196 DAG size of output: 1196 [2021-05-03 14:11:34,213 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 902 DAG size of output: 835 [2021-05-03 14:11:36,357 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 537 DAG size of output: 646 [2021-05-03 14:11:37,025 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 1968 DAG size of output: 788 [2021-05-03 14:11:38,312 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 3547 DAG size of output: 1474 [2021-05-03 14:11:38,708 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 3827 DAG size of output: 1502 [2021-05-03 14:11:39,048 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 3827 DAG size of output: 1502 [2021-05-03 14:11:39,404 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 3831 DAG size of output: 1506 [2021-05-03 14:11:39,734 WARN L205 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 1508 DAG size of output: 1846 [2021-05-03 14:11:40,034 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 1439 DAG size of output: 1661 [2021-05-03 14:11:40,279 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 1351 DAG size of output: 1419 [2021-05-03 14:11:40,912 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 1327 DAG size of output: 1293 [2021-05-03 14:11:41,056 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 1258 DAG size of output: 1224 [2021-05-03 14:11:44,694 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 1964 DAG size of output: 1228 [2021-05-03 14:11:45,101 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 2067 DAG size of output: 1291 [2021-05-03 14:11:45,312 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 2378 DAG size of output: 1331 [2021-05-03 14:11:47,491 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 3284 DAG size of output: 1905 [2021-05-03 14:11:47,615 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 625 DAG size of output: 747 [2021-05-03 14:11:50,319 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1313 DAG size of output: 822 [2021-05-03 14:11:50,454 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 1600 DAG size of output: 887 [2021-05-03 14:11:52,010 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 2332 DAG size of output: 1366 [2021-05-03 14:11:52,529 WARN L205 SmtUtils]: Spent 503.00 ms on a formula simplification. DAG size of input: 5160 DAG size of output: 2757 [2021-05-03 14:11:53,110 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 5160 DAG size of output: 2757 [2021-05-03 14:11:53,649 WARN L205 SmtUtils]: Spent 523.00 ms on a formula simplification. DAG size of input: 5163 DAG size of output: 2759 [2021-05-03 14:11:54,103 WARN L205 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 2762 DAG size of output: 2349 [2021-05-03 14:11:54,466 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 1795 DAG size of output: 1895 [2021-05-03 14:11:54,581 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1163 DAG size of output: 1141 [2021-05-03 14:11:56,634 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 1815 DAG size of output: 901 [2021-05-03 14:11:57,530 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 2334 DAG size of output: 1195 [2021-05-03 14:11:57,698 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 2334 DAG size of output: 1195 [2021-05-03 14:11:57,869 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 2337 DAG size of output: 1198 [2021-05-03 14:11:58,000 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 1200 DAG size of output: 1179 [2021-05-03 14:11:59,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:11:59,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:11:59,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:11:59,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:3 [2021-05-03 14:11:59,175 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:11:59,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:11:59,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-05-03 14:11:59,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011386915] [2021-05-03 14:11:59,175 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 14:11:59,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:11:59,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 14:11:59,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:11:59,176 INFO L87 Difference]: Start difference. First operand 13806 states and 44520 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-05-03 14:11:59,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:11:59,710 INFO L93 Difference]: Finished difference Result 14223 states and 45525 transitions. [2021-05-03 14:11:59,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:11:59,710 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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 [2021-05-03 14:11:59,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:11:59,731 INFO L225 Difference]: With dead ends: 14223 [2021-05-03 14:11:59,731 INFO L226 Difference]: Without dead ends: 14220 [2021-05-03 14:11:59,731 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 362.6ms TimeCoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:11:59,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14220 states. [2021-05-03 14:11:59,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14220 to 13986. [2021-05-03 14:11:59,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13986 states, 13985 states have (on average 3.229245620307472) internal successors, (45161), 13985 states have internal predecessors, (45161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:11:59,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13986 states to 13986 states and 45161 transitions. [2021-05-03 14:11:59,955 INFO L78 Accepts]: Start accepts. Automaton has 13986 states and 45161 transitions. Word has length 24 [2021-05-03 14:11:59,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:11:59,955 INFO L480 AbstractCegarLoop]: Abstraction has 13986 states and 45161 transitions. [2021-05-03 14:11:59,955 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-05-03 14:11:59,956 INFO L276 IsEmpty]: Start isEmpty. Operand 13986 states and 45161 transitions. [2021-05-03 14:11:59,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:11:59,966 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:11:59,966 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:00,188 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42750,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:12:00,188 INFO L428 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:00,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:00,189 INFO L82 PathProgramCache]: Analyzing trace with hash -2072056320, now seen corresponding path program 235 times [2021-05-03 14:12:00,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:00,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499720933] [2021-05-03 14:12:00,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:12:00,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499720933] [2021-05-03 14:12:00,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492964753] [2021-05-03 14:12:00,285 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 [2021-05-03 14:12:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:00,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 14:12:00,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:00,965 WARN L205 SmtUtils]: Spent 342.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2021-05-03 14:12:00,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:12:00,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-05-03 14:12:04,622 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 2556 DAG size of output: 2220 [2021-05-03 14:12:04,807 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 2556 DAG size of output: 2220 [2021-05-03 14:12:05,002 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 2567 DAG size of output: 2231 [2021-05-03 14:12:05,173 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 2231 DAG size of output: 2102 [2021-05-03 14:12:07,385 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 2025 DAG size of output: 1334 [2021-05-03 14:12:07,595 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 2894 DAG size of output: 1947 [2021-05-03 14:12:07,809 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 2894 DAG size of output: 1947 [2021-05-03 14:12:08,046 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 2901 DAG size of output: 1958 [2021-05-03 14:12:08,204 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 1951 DAG size of output: 1839 [2021-05-03 14:12:08,385 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 1841 DAG size of output: 1835 [2021-05-03 14:12:08,605 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 1812 DAG size of output: 1812 [2021-05-03 14:12:09,496 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 1223 DAG size of output: 1051 [2021-05-03 14:12:10,410 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 1641 DAG size of output: 1054 [2021-05-03 14:12:10,537 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 1677 DAG size of output: 1091 [2021-05-03 14:12:10,665 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 1677 DAG size of output: 1091 [2021-05-03 14:12:10,944 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 1683 DAG size of output: 1219 [2021-05-03 14:12:11,062 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 1039 DAG size of output: 1134 [2021-05-03 14:12:11,193 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 977 DAG size of output: 1294 [2021-05-03 14:12:12,691 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 1686 DAG size of output: 678 [2021-05-03 14:12:14,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:12:14,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:12:14,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:12:14,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:3 [2021-05-03 14:12:14,337 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:12:14,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:12:14,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-05-03 14:12:14,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212786686] [2021-05-03 14:12:14,337 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 14:12:14,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:12:14,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 14:12:14,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:12:14,337 INFO L87 Difference]: Start difference. First operand 13986 states and 45161 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-05-03 14:12:14,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:12:14,861 INFO L93 Difference]: Finished difference Result 14385 states and 46101 transitions. [2021-05-03 14:12:14,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:12:14,862 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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 [2021-05-03 14:12:14,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:12:14,884 INFO L225 Difference]: With dead ends: 14385 [2021-05-03 14:12:14,884 INFO L226 Difference]: Without dead ends: 14382 [2021-05-03 14:12:14,884 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 366.9ms TimeCoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:12:14,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14382 states. [2021-05-03 14:12:15,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14382 to 14142. [2021-05-03 14:12:15,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14142 states, 14141 states have (on average 3.233646842514674) internal successors, (45727), 14141 states have internal predecessors, (45727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:12:15,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14142 states to 14142 states and 45727 transitions. [2021-05-03 14:12:15,095 INFO L78 Accepts]: Start accepts. Automaton has 14142 states and 45727 transitions. Word has length 24 [2021-05-03 14:12:15,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:12:15,095 INFO L480 AbstractCegarLoop]: Abstraction has 14142 states and 45727 transitions. [2021-05-03 14:12:15,095 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-05-03 14:12:15,095 INFO L276 IsEmpty]: Start isEmpty. Operand 14142 states and 45727 transitions. [2021-05-03 14:12:15,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:12:15,106 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:12:15,106 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:12:15,320 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49855 [2021-05-03 14:12:15,321 INFO L428 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:12:15,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:12:15,321 INFO L82 PathProgramCache]: Analyzing trace with hash 447153144, now seen corresponding path program 236 times [2021-05-03 14:12:15,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:12:15,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525664123] [2021-05-03 14:12:15,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:12:15,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:12:15,418 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-05-03 14:12:15,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525664123] [2021-05-03 14:12:15,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918109358] [2021-05-03 14:12:15,418 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 [2021-05-03 14:12:15,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-03 14:12:15,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:12:15,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 14:12:15,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:12:16,220 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2021-05-03 14:12:16,220 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:12:16,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-05-03 14:12:18,668 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2021-05-03 14:12:19,489 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 2562 DAG size of output: 1823 [2021-05-03 14:12:19,656 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 2581 DAG size of output: 1839 [2021-05-03 14:12:19,831 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 2605 DAG size of output: 1846 [2021-05-03 14:12:20,004 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 2605 DAG size of output: 1846 [2021-05-03 14:12:20,198 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 2624 DAG size of output: 1865 [2021-05-03 14:12:20,426 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 1867 DAG size of output: 2280 [2021-05-03 14:12:20,612 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 934 DAG size of output: 920 [2021-05-03 14:12:20,744 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 904 DAG size of output: 1078 [2021-05-03 14:12:20,876 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 899 DAG size of output: 1242 [2021-05-03 14:12:23,724 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 1039 DAG size of output: 873 [2021-05-03 14:12:23,856 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 1127 DAG size of output: 964 [2021-05-03 14:12:24,016 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 1268 DAG size of output: 1076 [2021-05-03 14:12:24,179 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 1480 DAG size of output: 1122 [2021-05-03 14:12:24,828 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 112 [2021-05-03 14:12:25,819 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 1971 DAG size of output: 1455 [2021-05-03 14:12:26,063 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 2040 DAG size of output: 1463 [2021-05-03 14:12:28,995 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 1213 DAG size of output: 943 [2021-05-03 14:12:29,218 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 1385 DAG size of output: 1017 [2021-05-03 14:12:30,618 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 1836 DAG size of output: 1325 [2021-05-03 14:12:30,842 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 2261 DAG size of output: 1632 [2021-05-03 14:12:31,094 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 2581 DAG size of output: 1736 [2021-05-03 14:12:31,496 WARN L205 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 2933 DAG size of output: 2029 [2021-05-03 14:12:31,823 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 3007 DAG size of output: 2053 [2021-05-03 14:12:32,394 WARN L205 SmtUtils]: Spent 555.00 ms on a formula simplification. DAG size of input: 4540 DAG size of output: 3063 [2021-05-03 14:12:32,531 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 899 DAG size of output: 1237 [2021-05-03 14:12:32,964 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 670 DAG size of output: 906 [2021-05-03 14:12:36,938 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 1343 DAG size of output: 1009 [2021-05-03 14:12:37,115 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 1750 DAG size of output: 1348 [2021-05-03 14:12:37,336 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 2122 DAG size of output: 1668 [2021-05-03 14:12:37,677 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 2558 DAG size of output: 1972 [2021-05-03 14:12:37,963 WARN L205 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 2908 DAG size of output: 2098 [2021-05-03 14:12:38,301 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 3260 DAG size of output: 2388 [2021-05-03 14:12:38,679 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 3460 DAG size of output: 2480 [2021-05-03 14:12:38,815 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 894 DAG size of output: 1163 [2021-05-03 14:12:42,872 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 1104 DAG size of output: 995 [2021-05-03 14:12:43,002 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 1291 DAG size of output: 1029 [2021-05-03 14:12:43,164 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 1555 DAG size of output: 1221 [2021-05-03 14:12:43,401 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 2189 DAG size of output: 1663 [2021-05-03 14:12:43,920 WARN L205 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 2365 DAG size of output: 1749 [2021-05-03 14:12:44,242 WARN L205 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 2807 DAG size of output: 2066 [2021-05-03 14:12:44,969 WARN L205 SmtUtils]: Spent 709.00 ms on a formula simplification. DAG size of input: 5660 DAG size of output: 4045 [2021-05-03 14:12:46,317 WARN L205 SmtUtils]: Spent 1.32 s on a formula simplification. DAG size of input: 8759 DAG size of output: 5980 [2021-05-03 14:12:47,698 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 8784 DAG size of output: 5666 [2021-05-03 14:12:47,896 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 1859 DAG size of output: 1819 [2021-05-03 14:12:48,033 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 1793 [2021-05-03 14:12:48,287 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 1766 DAG size of output: 2099 [2021-05-03 14:12:48,412 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 1759 [2021-05-03 14:12:48,571 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 1295 DAG size of output: 1811 [2021-05-03 14:12:48,740 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 1262 DAG size of output: 1302 [2021-05-03 14:12:51,114 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 1165 DAG size of output: 926 [2021-05-03 14:12:51,226 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 1251 DAG size of output: 1018 [2021-05-03 14:12:51,349 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 1332 DAG size of output: 1092 [2021-05-03 14:12:51,490 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 1520 DAG size of output: 1240 [2021-05-03 14:12:51,650 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 1666 DAG size of output: 1406 [2021-05-03 14:12:51,825 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 1849 DAG size of output: 1459 [2021-05-03 14:12:52,072 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 2559 DAG size of output: 1973 [2021-05-03 14:12:54,636 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 1530 DAG size of output: 1253 [2021-05-03 14:12:54,796 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 1854 DAG size of output: 1451 [2021-05-03 14:12:54,988 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 2107 DAG size of output: 1697 [2021-05-03 14:12:55,291 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 2695 DAG size of output: 2119 [2021-05-03 14:12:55,791 WARN L205 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 4676 DAG size of output: 3586 [2021-05-03 14:12:57,236 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 918 DAG size of output: 804 [2021-05-03 14:12:58,804 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 1675 DAG size of output: 1379 [2021-05-03 14:12:59,006 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 2017 DAG size of output: 1624 [2021-05-03 14:12:59,792 WARN L205 SmtUtils]: Spent 767.00 ms on a formula simplification. DAG size of input: 6264 DAG size of output: 4898 [2021-05-03 14:13:00,067 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 1763 DAG size of output: 2470 [2021-05-03 14:13:00,263 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 1758 DAG size of output: 1813 [2021-05-03 14:13:00,383 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 871 DAG size of output: 1143 [2021-05-03 14:13:00,589 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 862 DAG size of output: 1047 [2021-05-03 14:13:04,737 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 1984 DAG size of output: 1323 [2021-05-03 14:13:04,953 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 2360 DAG size of output: 1652 [2021-05-03 14:13:05,196 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 2630 DAG size of output: 1780 [2021-05-03 14:13:05,548 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 3035 DAG size of output: 2183 [2021-05-03 14:13:05,947 WARN L205 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 4102 DAG size of output: 2959 [2021-05-03 14:13:06,109 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 1380 DAG size of output: 1392 [2021-05-03 14:13:08,582 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 1345 DAG size of output: 1115 [2021-05-03 14:13:08,728 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 1660 DAG size of output: 1313 [2021-05-03 14:13:08,904 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 1913 DAG size of output: 1543 [2021-05-03 14:13:10,577 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 2602 DAG size of output: 2007 [2021-05-03 14:13:10,931 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 3466 DAG size of output: 2722 [2021-05-03 14:13:11,760 WARN L205 SmtUtils]: Spent 807.00 ms on a formula simplification. DAG size of input: 6799 DAG size of output: 4973 [2021-05-03 14:13:13,328 WARN L205 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 11055 DAG size of output: 8214 [2021-05-03 14:13:15,678 WARN L205 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 11454 DAG size of output: 8236 [2021-05-03 14:13:17,406 WARN L205 SmtUtils]: Spent 1.67 s on a formula simplification. DAG size of input: 11488 DAG size of output: 7946 [2021-05-03 14:13:20,564 WARN L205 SmtUtils]: Spent 3.09 s on a formula simplification. DAG size of input: 18266 DAG size of output: 12205 [2021-05-03 14:13:23,741 WARN L205 SmtUtils]: Spent 3.09 s on a formula simplification. DAG size of input: 18266 DAG size of output: 12205 [2021-05-03 14:13:27,149 WARN L205 SmtUtils]: Spent 3.35 s on a formula simplification. DAG size of input: 18281 DAG size of output: 12220 [2021-05-03 14:13:29,411 WARN L205 SmtUtils]: Spent 2.22 s on a formula simplification. DAG size of input: 12214 DAG size of output: 11434 [2021-05-03 14:13:32,236 WARN L205 SmtUtils]: Spent 2.74 s on a formula simplification. DAG size of input: 11436 DAG size of output: 11343 [2021-05-03 14:13:33,743 WARN L205 SmtUtils]: Spent 1.46 s on a formula simplification. DAG size of input: 5060 DAG size of output: 7309 [2021-05-03 14:13:34,380 WARN L205 SmtUtils]: Spent 603.00 ms on a formula simplification. DAG size of input: 3922 DAG size of output: 2474 [2021-05-03 14:13:34,724 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 2474 DAG size of output: 2390 [2021-05-03 14:13:34,871 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 1216 DAG size of output: 1202 [2021-05-03 14:13:35,085 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 1202 DAG size of output: 1294 [2021-05-03 14:13:35,752 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 1201 DAG size of output: 1220 [2021-05-03 14:13:35,925 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 875 DAG size of output: 1277 [2021-05-03 14:13:36,039 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 850 DAG size of output: 863 [2021-05-03 14:13:38,162 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 1349 DAG size of output: 1036 [2021-05-03 14:13:38,277 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 604 DAG size of output: 806 [2021-05-03 14:13:40,351 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 2031 DAG size of output: 1489 [2021-05-03 14:13:40,667 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 2222 DAG size of output: 1620 [2021-05-03 14:13:40,944 WARN L205 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 2223 DAG size of output: 1621 [2021-05-03 14:13:41,135 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 1555 DAG size of output: 1550 [2021-05-03 14:13:41,356 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 1525 DAG size of output: 1650 [2021-05-03 14:13:41,610 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 1524 DAG size of output: 1761 [2021-05-03 14:13:41,791 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 653 DAG size of output: 818 [2021-05-03 14:13:44,154 WARN L205 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 1453 DAG size of output: 1737 [2021-05-03 14:13:44,302 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 921 DAG size of output: 1031 [2021-05-03 14:13:45,915 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 1236 DAG size of output: 1336 [2021-05-03 14:13:46,484 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 1078 DAG size of output: 1077 [2021-05-03 14:13:47,704 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 1401 DAG size of output: 1029 [2021-05-03 14:13:47,935 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 2051 DAG size of output: 1488 [2021-05-03 14:13:48,258 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 2632 DAG size of output: 1772 [2021-05-03 14:13:49,244 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 2903 DAG size of output: 1944 [2021-05-03 14:13:49,686 WARN L205 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 2934 DAG size of output: 1961 [2021-05-03 14:13:50,322 WARN L205 SmtUtils]: Spent 618.00 ms on a formula simplification. DAG size of input: 4648 DAG size of output: 3060 [2021-05-03 14:13:50,991 WARN L205 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 4648 DAG size of output: 3060 [2021-05-03 14:13:51,823 WARN L205 SmtUtils]: Spent 789.00 ms on a formula simplification. DAG size of input: 4467 DAG size of output: 3439 [2021-05-03 14:13:52,303 WARN L205 SmtUtils]: Spent 457.00 ms on a formula simplification. DAG size of input: 2696 DAG size of output: 2762 [2021-05-03 14:13:54,435 WARN L205 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 2496 DAG size of output: 2490 [2021-05-03 14:13:54,730 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 1479 DAG size of output: 1676 [2021-05-03 14:13:55,018 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 1419 DAG size of output: 1886 [2021-05-03 14:13:55,255 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 938 DAG size of output: 1037 [2021-05-03 14:13:56,473 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 1116 DAG size of output: 688 [2021-05-03 14:13:56,774 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 1362 DAG size of output: 1407 [2021-05-03 14:13:57,308 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 1166 DAG size of output: 1165 [2021-05-03 14:13:57,427 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 1139 DAG size of output: 1139 [2021-05-03 14:13:57,534 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 1084 DAG size of output: 1084 [2021-05-03 14:13:58,767 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 1546 DAG size of output: 1061 [2021-05-03 14:13:59,011 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 2257 DAG size of output: 1488 [2021-05-03 14:13:59,140 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 707 DAG size of output: 891 [2021-05-03 14:14:01,533 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 1187 DAG size of output: 880 [2021-05-03 14:14:01,887 WARN L205 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 2982 DAG size of output: 1893 [2021-05-03 14:14:02,127 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 1407 DAG size of output: 1401 [2021-05-03 14:14:02,345 WARN L205 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 1401 DAG size of output: 1408 [2021-05-03 14:14:02,486 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 716 DAG size of output: 981 [2021-05-03 14:14:03,973 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 858 DAG size of output: 688 [2021-05-03 14:14:05,144 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 1183 DAG size of output: 902 [2021-05-03 14:14:05,354 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 1009 DAG size of output: 1474 [2021-05-03 14:14:06,892 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 796 DAG size of output: 772 [2021-05-03 14:14:08,103 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 1539 DAG size of output: 1154 [2021-05-03 14:14:08,401 WARN L205 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 2441 DAG size of output: 1761 [2021-05-03 14:14:08,713 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 2442 DAG size of output: 1762 [2021-05-03 14:14:09,419 WARN L205 SmtUtils]: Spent 690.00 ms on a formula simplification. DAG size of input: 4855 DAG size of output: 3087 [2021-05-03 14:14:10,164 WARN L205 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 5468 DAG size of output: 3447 [2021-05-03 14:14:11,141 WARN L205 SmtUtils]: Spent 864.00 ms on a formula simplification. DAG size of input: 6028 DAG size of output: 3797 [2021-05-03 14:14:12,375 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 9483 DAG size of output: 4911 [2021-05-03 14:14:15,343 WARN L205 SmtUtils]: Spent 2.89 s on a formula simplification. DAG size of input: 9493 DAG size of output: 13413 [2021-05-03 14:14:16,775 WARN L205 SmtUtils]: Spent 1.36 s on a formula simplification. DAG size of input: 8568 DAG size of output: 5460 [2021-05-03 14:14:17,499 WARN L205 SmtUtils]: Spent 628.00 ms on a formula simplification. DAG size of input: 4451 DAG size of output: 4124 [2021-05-03 14:14:17,867 WARN L205 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 2673 DAG size of output: 2666 [2021-05-03 14:14:18,287 WARN L205 SmtUtils]: Spent 400.00 ms on a formula simplification. DAG size of input: 2641 DAG size of output: 2914 [2021-05-03 14:14:18,592 WARN L205 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 2418 DAG size of output: 2418 [2021-05-03 14:14:18,912 WARN L205 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 2345 DAG size of output: 2575 [2021-05-03 14:14:19,164 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification that was a NOOP. DAG size: 2342 [2021-05-03 14:14:19,451 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 1293 DAG size of output: 1802 [2021-05-03 14:14:19,582 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 1287 DAG size of output: 1287 [2021-05-03 14:14:20,725 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 1384 DAG size of output: 858 [2021-05-03 14:14:21,904 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 2006 DAG size of output: 1110 [2021-05-03 14:14:22,014 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 1317 [2021-05-03 14:14:22,988 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 949 DAG size of output: 727 [2021-05-03 14:14:23,105 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 1672 DAG size of output: 1205 [2021-05-03 14:14:23,400 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 3415 DAG size of output: 2104 [2021-05-03 14:14:24,311 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 3759 DAG size of output: 2297 [2021-05-03 14:14:24,749 WARN L205 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 3835 DAG size of output: 2364 [2021-05-03 14:14:24,869 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 1103 DAG size of output: 1100 [2021-05-03 14:14:24,997 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 1041 DAG size of output: 1145 [2021-05-03 14:14:26,644 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 663 DAG size of output: 909 [2021-05-03 14:14:28,708 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 1119 DAG size of output: 808 [2021-05-03 14:14:28,870 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 1823 DAG size of output: 1252 [2021-05-03 14:14:29,062 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 2036 DAG size of output: 1406 [2021-05-03 14:14:29,275 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 2097 DAG size of output: 1456 [2021-05-03 14:14:29,869 WARN L205 SmtUtils]: Spent 581.00 ms on a formula simplification. DAG size of input: 5155 DAG size of output: 3245 [2021-05-03 14:14:30,536 WARN L205 SmtUtils]: Spent 643.00 ms on a formula simplification. DAG size of input: 5190 DAG size of output: 3246 [2021-05-03 14:14:30,885 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 2109 DAG size of output: 2205 [2021-05-03 14:14:31,164 WARN L205 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 2076 DAG size of output: 2070 [2021-05-03 14:14:31,483 WARN L205 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 2070 DAG size of output: 1964 [2021-05-03 14:14:33,944 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 1238 DAG size of output: 888 [2021-05-03 14:14:34,238 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 1323 DAG size of output: 1975 [2021-05-03 14:14:34,356 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 1003 DAG size of output: 981 [2021-05-03 14:14:35,535 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 1292 DAG size of output: 1290 [2021-05-03 14:14:36,810 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 1162 DAG size of output: 894 [2021-05-03 14:14:37,054 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 1741 DAG size of output: 1256 [2021-05-03 14:14:37,384 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 2711 DAG size of output: 1907 [2021-05-03 14:14:37,728 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 2712 DAG size of output: 1908 [2021-05-03 14:14:38,339 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 2843 DAG size of output: 1949 [2021-05-03 14:14:39,351 WARN L205 SmtUtils]: Spent 991.00 ms on a formula simplification. DAG size of input: 7349 DAG size of output: 4434 [2021-05-03 14:14:40,498 WARN L205 SmtUtils]: Spent 1.11 s on a formula simplification. DAG size of input: 8338 DAG size of output: 4796 [2021-05-03 14:14:41,608 WARN L205 SmtUtils]: Spent 1.05 s on a formula simplification. DAG size of input: 6321 DAG size of output: 3609 [2021-05-03 14:14:42,194 WARN L205 SmtUtils]: Spent 563.00 ms on a formula simplification. DAG size of input: 3609 DAG size of output: 3359 [2021-05-03 14:14:42,598 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 2272 DAG size of output: 2447 [2021-05-03 14:14:42,755 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 1037 DAG size of output: 1147 [2021-05-03 14:14:42,957 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 1033 DAG size of output: 1357 [2021-05-03 14:14:44,463 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 989 DAG size of output: 912 [2021-05-03 14:14:46,561 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 1705 DAG size of output: 1141 [2021-05-03 14:14:47,302 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 1907 DAG size of output: 1295 [2021-05-03 14:14:47,599 WARN L205 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 2073 DAG size of output: 2073 [2021-05-03 14:14:47,911 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 2048 DAG size of output: 2252 [2021-05-03 14:14:48,866 WARN L205 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 2047 DAG size of output: 2493 [2021-05-03 14:14:49,209 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 1688 DAG size of output: 1899 [2021-05-03 14:14:50,123 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 1576 DAG size of output: 1576 [2021-05-03 14:14:50,290 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 1514 [2021-05-03 14:14:51,587 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 1544 DAG size of output: 1064 [2021-05-03 14:14:51,731 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 1606 DAG size of output: 1128 [2021-05-03 14:14:51,939 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 2074 DAG size of output: 1426 [2021-05-03 14:14:52,178 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 1352 DAG size of output: 1548 [2021-05-03 14:14:52,320 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 1272 DAG size of output: 1268 [2021-05-03 14:14:52,450 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 1236 [2021-05-03 14:14:52,557 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 678 [2021-05-03 14:14:54,334 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 1633 DAG size of output: 976 [2021-05-03 14:14:54,684 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 3210 DAG size of output: 2003 [2021-05-03 14:14:55,084 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification. DAG size of input: 3435 DAG size of output: 2157 [2021-05-03 14:14:55,499 WARN L205 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 3471 DAG size of output: 2176 [2021-05-03 14:14:56,161 WARN L205 SmtUtils]: Spent 645.00 ms on a formula simplification. DAG size of input: 4709 DAG size of output: 2988 [2021-05-03 14:14:56,381 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 1622 DAG size of output: 1605 [2021-05-03 14:14:56,586 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 1603 DAG size of output: 1603 [2021-05-03 14:14:56,720 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 951 DAG size of output: 825 [2021-05-03 14:14:59,336 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 1304 DAG size of output: 894 [2021-05-03 14:15:00,991 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 1046 DAG size of output: 739 [2021-05-03 14:15:01,955 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 1438 DAG size of output: 1021 [2021-05-03 14:15:02,261 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 2485 DAG size of output: 1693 [2021-05-03 14:15:02,587 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 2486 DAG size of output: 1694 [2021-05-03 14:15:03,548 WARN L205 SmtUtils]: Spent 941.00 ms on a formula simplification. DAG size of input: 6632 DAG size of output: 4056 [2021-05-03 14:15:04,537 WARN L205 SmtUtils]: Spent 956.00 ms on a formula simplification. DAG size of input: 6632 DAG size of output: 4056 [2021-05-03 14:15:06,574 WARN L205 SmtUtils]: Spent 1.99 s on a formula simplification. DAG size of input: 13263 DAG size of output: 7694 [2021-05-03 14:15:09,969 WARN L205 SmtUtils]: Spent 3.33 s on a formula simplification. DAG size of input: 20522 DAG size of output: 11240 [2021-05-03 14:15:13,365 WARN L205 SmtUtils]: Spent 3.30 s on a formula simplification. DAG size of input: 20522 DAG size of output: 11240 [2021-05-03 14:15:18,225 WARN L205 SmtUtils]: Spent 4.72 s on a formula simplification. DAG size of input: 20530 DAG size of output: 11901 [2021-05-03 14:15:19,979 WARN L205 SmtUtils]: Spent 1.68 s on a formula simplification. DAG size of input: 8921 DAG size of output: 8023 [2021-05-03 14:15:20,170 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 996 DAG size of output: 1000 [2021-05-03 14:15:20,430 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 699 DAG size of output: 915 [2021-05-03 14:15:21,266 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 1061 DAG size of output: 650 [2021-05-03 14:15:21,404 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 596 DAG size of output: 576 [2021-05-03 14:15:21,981 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 1419 DAG size of output: 872 [2021-05-03 14:15:22,234 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 1206 DAG size of output: 1284 [2021-05-03 14:15:22,442 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 620 DAG size of output: 796 [2021-05-03 14:15:23,607 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 981 DAG size of output: 1117 [2021-05-03 14:15:23,854 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 966 DAG size of output: 1350 [2021-05-03 14:15:24,119 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 964 DAG size of output: 1295 [2021-05-03 14:15:24,227 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 864 DAG size of output: 861 [2021-05-03 14:15:24,741 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 640 DAG size of output: 632 [2021-05-03 14:15:25,163 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 1464 DAG size of output: 883 [2021-05-03 14:15:25,362 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 705 DAG size of output: 696 [2021-05-03 14:15:26,141 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 2109 DAG size of output: 1276 [2021-05-03 14:15:26,889 WARN L205 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 2479 DAG size of output: 1516 [2021-05-03 14:15:27,223 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 3059 DAG size of output: 1968 [2021-05-03 14:15:28,810 WARN L205 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 10311 DAG size of output: 6180 [2021-05-03 14:15:29,695 WARN L205 SmtUtils]: Spent 828.00 ms on a formula simplification. DAG size of input: 4861 DAG size of output: 4452 [2021-05-03 14:15:29,895 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 1537 DAG size of output: 1532 [2021-05-03 14:15:31,036 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 1757 DAG size of output: 1030 [2021-05-03 14:15:31,363 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 1585 DAG size of output: 1530 [2021-05-03 14:15:32,208 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 1170 DAG size of output: 1308 [2021-05-03 14:15:32,523 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 1135 DAG size of output: 1582 [2021-05-03 14:15:33,458 WARN L205 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 1133 DAG size of output: 1439 [2021-05-03 14:15:33,583 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 919 DAG size of output: 892 [2021-05-03 14:15:34,605 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 1516 DAG size of output: 930 [2021-05-03 14:15:34,776 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 2136 DAG size of output: 1086 [2021-05-03 14:15:35,450 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 2423 DAG size of output: 1259 [2021-05-03 14:15:35,719 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 2840 DAG size of output: 1583 [2021-05-03 14:15:36,312 WARN L205 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 5918 DAG size of output: 3328 [2021-05-03 14:15:38,249 WARN L205 SmtUtils]: Spent 1.90 s on a formula simplification. DAG size of input: 14656 DAG size of output: 8395 [2021-05-03 14:15:40,233 WARN L205 SmtUtils]: Spent 1.91 s on a formula simplification. DAG size of input: 14656 DAG size of output: 8395 [2021-05-03 14:15:42,239 WARN L205 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 14661 DAG size of output: 8400 [2021-05-03 14:15:43,885 WARN L205 SmtUtils]: Spent 1.58 s on a formula simplification. DAG size of input: 8402 DAG size of output: 7384 [2021-05-03 14:15:44,730 WARN L205 SmtUtils]: Spent 806.00 ms on a formula simplification. DAG size of input: 5666 DAG size of output: 5157 [2021-05-03 14:15:45,963 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 5285 DAG size of output: 2798 [2021-05-03 14:15:46,503 WARN L205 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 2575 DAG size of output: 2688 [2021-05-03 14:15:46,859 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 2434 DAG size of output: 1874 [2021-05-03 14:15:47,070 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 1818 DAG size of output: 1079 [2021-05-03 14:15:48,737 WARN L205 SmtUtils]: Spent 524.00 ms on a formula simplification. DAG size of input: 6260 DAG size of output: 2943 [2021-05-03 14:15:49,341 WARN L205 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 6260 DAG size of output: 2943 [2021-05-03 14:15:49,907 WARN L205 SmtUtils]: Spent 549.00 ms on a formula simplification. DAG size of input: 6264 DAG size of output: 2947 [2021-05-03 14:15:50,183 WARN L205 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 2949 DAG size of output: 1508 [2021-05-03 14:15:50,380 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 1478 DAG size of output: 1136 [2021-05-03 14:15:52,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:15:52,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:15:52,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:15:52,403 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:3 [2021-05-03 14:15:52,410 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:15:52,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:15:52,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-05-03 14:15:52,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751156164] [2021-05-03 14:15:52,410 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 14:15:52,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:15:52,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 14:15:52,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:15:52,411 INFO L87 Difference]: Start difference. First operand 14142 states and 45727 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-05-03 14:15:53,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:15:53,006 INFO L93 Difference]: Finished difference Result 14568 states and 46771 transitions. [2021-05-03 14:15:53,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:15:53,006 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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 [2021-05-03 14:15:53,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:15:53,036 INFO L225 Difference]: With dead ends: 14568 [2021-05-03 14:15:53,036 INFO L226 Difference]: Without dead ends: 14565 [2021-05-03 14:15:53,036 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 474.3ms TimeCoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:15:53,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14565 states. [2021-05-03 14:15:53,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14565 to 14324. [2021-05-03 14:15:53,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14324 states, 14323 states have (on average 3.239195699225023) internal successors, (46395), 14323 states have internal predecessors, (46395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:15:53,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14324 states to 14324 states and 46395 transitions. [2021-05-03 14:15:53,285 INFO L78 Accepts]: Start accepts. Automaton has 14324 states and 46395 transitions. Word has length 24 [2021-05-03 14:15:53,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:15:53,285 INFO L480 AbstractCegarLoop]: Abstraction has 14324 states and 46395 transitions. [2021-05-03 14:15:53,285 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-05-03 14:15:53,285 INFO L276 IsEmpty]: Start isEmpty. Operand 14324 states and 46395 transitions. [2021-05-03 14:15:53,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:15:53,297 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:15:53,298 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:15:53,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52761,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-03 14:15:53,500 INFO L428 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:15:53,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:15:53,501 INFO L82 PathProgramCache]: Analyzing trace with hash 1233235200, now seen corresponding path program 237 times [2021-05-03 14:15:53,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:15:53,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249372276] [2021-05-03 14:15:53,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:15:53,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:15:53,597 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:15:53,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249372276] [2021-05-03 14:15:53,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196271389] [2021-05-03 14:15:53,597 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 [2021-05-03 14:15:53,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-05-03 14:15:53,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:15:53,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 14:15:53,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:15:54,312 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2021-05-03 14:15:54,312 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:15:54,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-05-03 14:15:55,760 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 996 DAG size of output: 896 [2021-05-03 14:15:56,955 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 1603 DAG size of output: 1381 [2021-05-03 14:15:57,090 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 1629 DAG size of output: 1407 [2021-05-03 14:15:57,224 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 1629 DAG size of output: 1407 [2021-05-03 14:15:57,380 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 1648 DAG size of output: 1426 [2021-05-03 14:15:57,589 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 1426 DAG size of output: 1421 [2021-05-03 14:15:57,837 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 1399 DAG size of output: 1982 [2021-05-03 14:15:58,084 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 1328 DAG size of output: 1547 [2021-05-03 14:15:58,272 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 1255 DAG size of output: 1557 [2021-05-03 14:16:02,307 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 1260 DAG size of output: 962 [2021-05-03 14:16:03,916 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 919 DAG size of output: 741 [2021-05-03 14:16:04,083 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 1721 DAG size of output: 1233 [2021-05-03 14:16:07,685 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 1087 DAG size of output: 904 [2021-05-03 14:16:07,863 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 1607 DAG size of output: 1177 [2021-05-03 14:16:08,300 WARN L205 SmtUtils]: Spent 427.00 ms on a formula simplification. DAG size of input: 3045 DAG size of output: 2154 [2021-05-03 14:16:08,697 WARN L205 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 3155 DAG size of output: 2180 [2021-05-03 14:16:10,391 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 741 DAG size of output: 647 [2021-05-03 14:16:12,334 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 1481 DAG size of output: 1238 [2021-05-03 14:16:12,594 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 1533 DAG size of output: 1275 [2021-05-03 14:16:12,725 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 356 DAG size of output: 430 [2021-05-03 14:16:15,785 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 1177 DAG size of output: 838 [2021-05-03 14:16:15,935 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 1349 DAG size of output: 1007 [2021-05-03 14:16:16,105 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 1535 DAG size of output: 1212 [2021-05-03 14:16:16,434 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 2717 DAG size of output: 1910 [2021-05-03 14:16:17,242 WARN L205 SmtUtils]: Spent 791.00 ms on a formula simplification. DAG size of input: 5471 DAG size of output: 3659 [2021-05-03 14:16:20,244 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 877 DAG size of output: 588 [2021-05-03 14:16:23,603 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 539 DAG size of output: 358 [2021-05-03 14:16:24,188 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 1722 DAG size of output: 1054 [2021-05-03 14:16:28,037 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 1189 DAG size of output: 833 [2021-05-03 14:16:31,630 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 1147 DAG size of output: 735 [2021-05-03 14:16:31,843 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 2057 DAG size of output: 1253 [2021-05-03 14:16:32,076 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 2136 DAG size of output: 1311 [2021-05-03 14:16:32,579 WARN L205 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 3529 DAG size of output: 2127 [2021-05-03 14:16:33,801 WARN L205 SmtUtils]: Spent 1.19 s on a formula simplification. DAG size of input: 8110 DAG size of output: 5148 [2021-05-03 14:16:35,128 WARN L205 SmtUtils]: Spent 1.29 s on a formula simplification. DAG size of input: 8597 DAG size of output: 5417 [2021-05-03 14:16:36,578 WARN L205 SmtUtils]: Spent 1.40 s on a formula simplification. DAG size of input: 9668 DAG size of output: 6313 [2021-05-03 14:16:38,218 WARN L205 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 10713 DAG size of output: 6436 [2021-05-03 14:16:39,966 WARN L205 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 11841 DAG size of output: 7247 [2021-05-03 14:16:41,797 WARN L205 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 11852 DAG size of output: 7262 [2021-05-03 14:16:43,610 WARN L205 SmtUtils]: Spent 1.75 s on a formula simplification. DAG size of input: 11852 DAG size of output: 7262 [2021-05-03 14:16:45,574 WARN L205 SmtUtils]: Spent 1.92 s on a formula simplification. DAG size of input: 11867 DAG size of output: 7277 [2021-05-03 14:16:46,799 WARN L205 SmtUtils]: Spent 1.20 s on a formula simplification. DAG size of input: 7271 DAG size of output: 6874 [2021-05-03 14:16:49,075 WARN L205 SmtUtils]: Spent 2.23 s on a formula simplification. DAG size of input: 6876 DAG size of output: 10248 [2021-05-03 14:16:50,761 WARN L205 SmtUtils]: Spent 1.62 s on a formula simplification. DAG size of input: 6861 DAG size of output: 7667 [2021-05-03 14:16:51,364 WARN L205 SmtUtils]: Spent 565.00 ms on a formula simplification. DAG size of input: 3237 DAG size of output: 2344 [2021-05-03 14:16:51,707 WARN L205 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 2056 DAG size of output: 2047 [2021-05-03 14:16:52,191 WARN L205 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 2036 DAG size of output: 2036 [2021-05-03 14:16:52,750 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 1898 DAG size of output: 1481 [2021-05-03 14:16:53,828 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 970 DAG size of output: 1105 [2021-05-03 14:16:54,885 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 820 DAG size of output: 762 [2021-05-03 14:16:56,461 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 1227 DAG size of output: 741 [2021-05-03 14:16:56,663 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 1792 DAG size of output: 1036 [2021-05-03 14:16:56,893 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 1994 DAG size of output: 1121 [2021-05-03 14:16:57,127 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 2083 DAG size of output: 1082 [2021-05-03 14:16:57,451 WARN L205 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 2408 DAG size of output: 1355 [2021-05-03 14:16:58,354 WARN L205 SmtUtils]: Spent 869.00 ms on a formula simplification. DAG size of input: 5449 DAG size of output: 3058 [2021-05-03 14:16:58,952 WARN L205 SmtUtils]: Spent 577.00 ms on a formula simplification. DAG size of input: 2758 DAG size of output: 2409 [2021-05-03 14:16:59,209 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 1524 DAG size of output: 1459 [2021-05-03 14:16:59,427 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 1447 DAG size of output: 1419 [2021-05-03 14:16:59,579 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 963 DAG size of output: 961 [2021-05-03 14:16:59,694 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 782 DAG size of output: 782 [2021-05-03 14:17:01,239 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 1653 DAG size of output: 616 [2021-05-03 14:17:01,379 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 1663 DAG size of output: 563 [2021-05-03 14:17:01,610 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 1385 DAG size of output: 1382 [2021-05-03 14:17:01,830 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 1370 DAG size of output: 1369 [2021-05-03 14:17:02,100 WARN L205 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 1108 DAG size of output: 1114 [2021-05-03 14:17:02,261 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 572 DAG size of output: 788 [2021-05-03 14:17:02,397 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 535 DAG size of output: 532 [2021-05-03 14:17:04,088 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 951 DAG size of output: 729 [2021-05-03 14:17:04,247 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 914 DAG size of output: 912 [2021-05-03 14:17:06,210 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 1327 DAG size of output: 855 [2021-05-03 14:17:06,466 WARN L205 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 1954 DAG size of output: 1259 [2021-05-03 14:17:07,385 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 2287 DAG size of output: 1503 [2021-05-03 14:17:07,938 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 2414 DAG size of output: 1590 [2021-05-03 14:17:08,414 WARN L205 SmtUtils]: Spent 461.00 ms on a formula simplification. DAG size of input: 3775 DAG size of output: 1957 [2021-05-03 14:17:08,973 WARN L205 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 4108 DAG size of output: 2247 [2021-05-03 14:17:09,842 WARN L205 SmtUtils]: Spent 846.00 ms on a formula simplification. DAG size of input: 5923 DAG size of output: 3169 [2021-05-03 14:17:11,142 WARN L205 SmtUtils]: Spent 1.25 s on a formula simplification. DAG size of input: 5545 DAG size of output: 5861 [2021-05-03 14:17:11,900 WARN L205 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 4769 DAG size of output: 2712 [2021-05-03 14:17:12,333 WARN L205 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 2453 DAG size of output: 2435 [2021-05-03 14:17:12,789 WARN L205 SmtUtils]: Spent 437.00 ms on a formula simplification. DAG size of input: 2424 DAG size of output: 2022 [2021-05-03 14:17:12,978 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 1196 [2021-05-03 14:17:13,374 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 983 DAG size of output: 983 [2021-05-03 14:17:15,749 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 1355 DAG size of output: 843 [2021-05-03 14:17:15,935 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 1602 DAG size of output: 1013 [2021-05-03 14:17:16,257 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 1321 DAG size of output: 1130 [2021-05-03 14:17:16,945 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 843 DAG size of output: 839 [2021-05-03 14:17:17,947 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 1464 DAG size of output: 592 [2021-05-03 14:17:18,339 WARN L205 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 2819 DAG size of output: 1430 [2021-05-03 14:17:19,252 WARN L205 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 3088 DAG size of output: 1464 [2021-05-03 14:17:19,647 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 3371 DAG size of output: 1700 [2021-05-03 14:17:20,008 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 2343 DAG size of output: 1675 [2021-05-03 14:17:20,376 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 1425 DAG size of output: 1418 [2021-05-03 14:17:20,634 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 1409 DAG size of output: 1275 [2021-05-03 14:17:20,793 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 743 DAG size of output: 741 [2021-05-03 14:17:20,987 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 686 DAG size of output: 740 [2021-05-03 14:17:23,033 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 1097 DAG size of output: 737 [2021-05-03 14:17:23,232 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 1182 DAG size of output: 785 [2021-05-03 14:17:23,350 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 865 DAG size of output: 596 [2021-05-03 14:17:24,330 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 1773 DAG size of output: 1064 [2021-05-03 14:17:24,826 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 1915 DAG size of output: 1066 [2021-05-03 14:17:25,068 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 2195 DAG size of output: 1308 [2021-05-03 14:17:25,724 WARN L205 SmtUtils]: Spent 641.00 ms on a formula simplification. DAG size of input: 4788 DAG size of output: 2444 [2021-05-03 14:17:27,094 WARN L205 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 9026 DAG size of output: 4498 [2021-05-03 14:17:28,528 WARN L205 SmtUtils]: Spent 1.39 s on a formula simplification. DAG size of input: 9026 DAG size of output: 4498 [2021-05-03 14:17:30,433 WARN L205 SmtUtils]: Spent 1.84 s on a formula simplification. DAG size of input: 9035 DAG size of output: 4170 [2021-05-03 14:17:30,875 WARN L205 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 2670 DAG size of output: 2159 [2021-05-03 14:17:32,367 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 2197 DAG size of output: 871 [2021-05-03 14:17:32,589 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 1840 DAG size of output: 1265 [2021-05-03 14:17:34,850 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 1631 DAG size of output: 806 [2021-05-03 14:17:35,187 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 3576 DAG size of output: 1470 [2021-05-03 14:17:35,537 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 3576 DAG size of output: 1470 [2021-05-03 14:17:35,909 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 3584 DAG size of output: 1478 [2021-05-03 14:17:36,132 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 1480 DAG size of output: 1083 [2021-05-03 14:17:36,602 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 1023 DAG size of output: 1130 [2021-05-03 14:17:36,728 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 980 DAG size of output: 963 [2021-05-03 14:17:38,898 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 1881 DAG size of output: 733 [2021-05-03 14:17:39,097 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 2073 DAG size of output: 802 [2021-05-03 14:17:39,230 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 2073 DAG size of output: 802 [2021-05-03 14:17:39,373 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 2077 DAG size of output: 806 [2021-05-03 14:17:40,376 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-03 14:17:40,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:17:40,378 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-03 14:17:40,378 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:3 [2021-05-03 14:17:40,385 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-03 14:17:40,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-03 14:17:40,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-05-03 14:17:40,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939628982] [2021-05-03 14:17:40,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-03 14:17:40,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-03 14:17:40,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-03 14:17:40,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:17:40,386 INFO L87 Difference]: Start difference. First operand 14324 states and 46395 transitions. Second operand has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-05-03 14:17:40,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-03 14:17:40,999 INFO L93 Difference]: Finished difference Result 14853 states and 47825 transitions. [2021-05-03 14:17:41,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-03 14:17:41,000 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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 [2021-05-03 14:17:41,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-03 14:17:41,028 INFO L225 Difference]: With dead ends: 14853 [2021-05-03 14:17:41,028 INFO L226 Difference]: Without dead ends: 14850 [2021-05-03 14:17:41,028 INFO L807 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 373.6ms TimeCoverageRelationStatistics Valid=72, Invalid=798, Unknown=0, NotChecked=0, Total=870 [2021-05-03 14:17:41,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14850 states. [2021-05-03 14:17:41,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14850 to 14602. [2021-05-03 14:17:41,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14602 states, 14601 states have (on average 3.2490925279090472) internal successors, (47440), 14601 states have internal predecessors, (47440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-03 14:17:41,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14602 states to 14602 states and 47440 transitions. [2021-05-03 14:17:41,294 INFO L78 Accepts]: Start accepts. Automaton has 14602 states and 47440 transitions. Word has length 24 [2021-05-03 14:17:41,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-03 14:17:41,295 INFO L480 AbstractCegarLoop]: Abstraction has 14602 states and 47440 transitions. [2021-05-03 14:17:41,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.4) internal successors, (42), 29 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) [2021-05-03 14:17:41,295 INFO L276 IsEmpty]: Start isEmpty. Operand 14602 states and 47440 transitions. [2021-05-03 14:17:41,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-03 14:17:41,309 INFO L543 BasicCegarLoop]: Found error trace [2021-05-03 14:17:41,309 INFO L551 BasicCegarLoop]: trace histogram [12, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-03 14:17:41,510 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74734 [2021-05-03 14:17:41,511 INFO L428 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-03 14:17:41,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-03 14:17:41,511 INFO L82 PathProgramCache]: Analyzing trace with hash -168024840, now seen corresponding path program 238 times [2021-05-03 14:17:41,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-03 14:17:41,511 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916937648] [2021-05-03 14:17:41,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-03 14:17:41,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-03 14:17:41,608 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-03 14:17:41,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916937648] [2021-05-03 14:17:41,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38803366] [2021-05-03 14:17:41,608 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 [2021-05-03 14:17:41,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-03 14:17:41,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-03 14:17:41,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 37 conjunts are in the unsatisfiable core [2021-05-03 14:17:41,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-03 14:17:42,321 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification that was a NOOP. DAG size: 289 [2021-05-03 14:17:42,321 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-05-03 14:17:42,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 23 new quantified variables, introduced 66 case distinctions, treesize of input 55 treesize of output 568 [2021-05-03 14:17:43,483 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 489 DAG size of output: 388 [2021-05-03 14:17:46,516 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 298 DAG size of output: 286 [2021-05-03 14:17:46,844 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 1022 DAG size of output: 887 [2021-05-03 14:17:47,001 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 1074 DAG size of output: 930 [2021-05-03 14:17:47,425 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 1223 DAG size of output: 1113 [2021-05-03 14:17:47,619 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 1238 DAG size of output: 1123 [2021-05-03 14:17:49,973 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 1334 DAG size of output: 900 [2021-05-03 14:17:50,106 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 1348 DAG size of output: 903 [2021-05-03 14:17:52,496 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 1313 DAG size of output: 894 [2021-05-03 14:17:52,754 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 2141 DAG size of output: 1428 [2021-05-03 14:17:53,216 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 3034 DAG size of output: 2306 [2021-05-03 14:17:54,244 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 512 DAG size of output: 424 [2021-05-03 14:17:55,490 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 1245 DAG size of output: 1068 [2021-05-03 14:17:57,386 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 1037 DAG size of output: 895 [2021-05-03 14:17:57,514 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 1054 DAG size of output: 910 [2021-05-03 14:17:57,790 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 1846 DAG size of output: 1524 [2021-05-03 14:17:58,312 WARN L205 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 2036 DAG size of output: 1737 [2021-05-03 14:17:58,644 WARN L205 SmtUtils]: Spent 322.00 ms on a formula simplification. DAG size of input: 2052 DAG size of output: 1747 [2021-05-03 14:18:01,200 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 1246 DAG size of output: 1043 [2021-05-03 14:18:01,433 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 1247 DAG size of output: 1044 [2021-05-03 14:18:01,598 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 1414 DAG size of output: 1189 [2021-05-03 14:18:03,976 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 1009 DAG size of output: 818 [2021-05-03 14:18:04,247 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 1642 DAG size of output: 1409 [2021-05-03 14:18:04,597 WARN L205 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 2432 DAG size of output: 2089 [2021-05-03 14:18:04,975 WARN L205 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 2444 DAG size of output: 2089 [2021-05-03 14:18:05,681 WARN L205 SmtUtils]: Spent 690.00 ms on a formula simplification. DAG size of input: 4052 DAG size of output: 3368 [2021-05-03 14:18:06,878 WARN L205 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 6391 DAG size of output: 4999 [2021-05-03 14:18:08,135 WARN L205 SmtUtils]: Spent 1.22 s on a formula simplification. DAG size of input: 6405 DAG size of output: 5013 [2021-05-03 14:18:10,066 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 1551 DAG size of output: 1137 [2021-05-03 14:18:10,214 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 1564 DAG size of output: 1140 [2021-05-03 14:18:11,663 WARN L205 SmtUtils]: Spent 1.43 s on a formula simplification. DAG size of input: 7776 DAG size of output: 5926 [2021-05-03 14:18:13,191 WARN L205 SmtUtils]: Spent 1.49 s on a formula simplification. DAG size of input: 7920 DAG size of output: 6050 [2021-05-03 14:18:14,760 WARN L205 SmtUtils]: Spent 1.53 s on a formula simplification. DAG size of input: 7957 DAG size of output: 6078 [2021-05-03 14:18:16,359 WARN L205 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 7957 DAG size of output: 6078 [2021-05-03 14:18:17,941 WARN L205 SmtUtils]: Spent 1.55 s on a formula simplification. DAG size of input: 7966 DAG size of output: 6087 [2021-05-03 14:18:19,958 WARN L205 SmtUtils]: Spent 1.98 s on a formula simplification. DAG size of input: 6089 DAG size of output: 7835 [2021-05-03 14:18:21,503 WARN L205 SmtUtils]: Spent 1.50 s on a formula simplification. DAG size of input: 5941 DAG size of output: 6386 [2021-05-03 14:18:21,983 WARN L205 SmtUtils]: Spent 454.00 ms on a formula simplification. DAG size of input: 2927 DAG size of output: 2915 [2021-05-03 14:18:22,493 WARN L205 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 2886 DAG size of output: 2879 [2021-05-03 14:18:23,487 WARN L205 SmtUtils]: Spent 404.00 ms on a formula simplification that was a NOOP. DAG size: 2796 [2021-05-03 14:18:23,832 WARN L205 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 2332 DAG size of output: 2332 [2021-05-03 14:18:24,176 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification that was a NOOP. DAG size: 2320 [2021-05-03 14:18:24,378 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 1084 DAG size of output: 1299 [2021-05-03 14:18:24,515 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 1077 DAG size of output: 1076 [2021-05-03 14:18:24,650 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 1071 DAG size of output: 1071 [2021-05-03 14:18:24,823 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 891 DAG size of output: 890 [2021-05-03 14:18:28,805 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 1504 DAG size of output: 1038 [2021-05-03 14:18:28,961 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 1508 DAG size of output: 1044 [2021-05-03 14:18:29,142 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 1812 DAG size of output: 1226 [2021-05-03 14:18:29,340 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 1515 DAG size of output: 1514 [2021-05-03 14:18:29,539 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 1507 DAG size of output: 1507 Received shutdown request... [2021-05-03 14:18:30,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92693 [2021-05-03 14:18:30,035 WARN L545 AbstractCegarLoop]: Verification canceled [2021-05-03 14:18:30,038 WARN L224 ceAbstractionStarter]: Timeout [2021-05-03 14:18:30,039 INFO L202 PluginConnector]: Adding new model unroll-4.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.05 02:18:30 BasicIcfg [2021-05-03 14:18:30,039 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-05-03 14:18:30,040 INFO L168 Benchmark]: Toolchain (without parser) took 855055.39 ms. Allocated memory was 346.0 MB in the beginning and 5.6 GB in the end (delta: 5.2 GB). Free memory was 325.4 MB in the beginning and 1.9 GB in the end (delta: -1.6 GB). Peak memory consumption was 3.8 GB. Max. memory is 16.0 GB. [2021-05-03 14:18:30,040 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 346.0 MB. Free memory is still 326.5 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 14:18:30,040 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.93 ms. Allocated memory is still 346.0 MB. Free memory was 325.3 MB in the beginning and 323.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-03 14:18:30,040 INFO L168 Benchmark]: Boogie Preprocessor took 13.29 ms. Allocated memory is still 346.0 MB. Free memory was 323.9 MB in the beginning and 323.0 MB in the end (delta: 896.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-03 14:18:30,040 INFO L168 Benchmark]: RCFGBuilder took 306.81 ms. Allocated memory is still 346.0 MB. Free memory was 322.8 MB in the beginning and 307.2 MB in the end (delta: 15.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-05-03 14:18:30,040 INFO L168 Benchmark]: TraceAbstraction took 854691.75 ms. Allocated memory was 346.0 MB in the beginning and 5.6 GB in the end (delta: 5.2 GB). Free memory was 306.7 MB in the beginning and 1.9 GB in the end (delta: -1.6 GB). Peak memory consumption was 3.7 GB. Max. memory is 16.0 GB. [2021-05-03 14:18:30,040 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 0.12 ms. Allocated memory is still 346.0 MB. Free memory is still 326.5 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 28.93 ms. Allocated memory is still 346.0 MB. Free memory was 325.3 MB in the beginning and 323.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.29 ms. Allocated memory is still 346.0 MB. Free memory was 323.9 MB in the beginning and 323.0 MB in the end (delta: 896.9 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 306.81 ms. Allocated memory is still 346.0 MB. Free memory was 322.8 MB in the beginning and 307.2 MB in the end (delta: 15.6 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 854691.75 ms. Allocated memory was 346.0 MB in the beginning and 5.6 GB in the end (delta: 5.2 GB). Free memory was 306.7 MB in the beginning and 1.9 GB in the end (delta: -1.6 GB). Peak memory consumption was 3.7 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 57]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 57). Cancelled while BasicCegarLoop was analyzing trace of length 25 with TraceHistMax 12,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 854590.6ms, OverallIterations: 242, TraceHistogramMax: 12, EmptinessCheckTime: 976.7ms, AutomataDifference: 42067.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 15.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4705 SDtfs, 17159 SDslu, 33944 SDs, 0 SdLazy, 35249 SolverSat, 5341 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 14408.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9103 GetRequests, 4250 SyntacticMatches, 109 SemanticMatches, 4744 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24084 ImplicationChecksByTransitivity, 31542.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=14602occurred in iteration=241, InterpolantAutomatonStates: 4344, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 22353.6ms AutomataMinimizationTime, 241 MinimizatonAttempts, 92334 StatesRemovedByMinimization, 235 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 747.8ms SsaConstructionTime, 2584.5ms SatisfiabilityAnalysisTime, 684410.4ms InterpolantComputationTime, 9195 NumberOfCodeBlocks, 9194 NumberOfCodeBlocksAsserted, 1022 NumberOfCheckSat, 8716 ConstructedInterpolants, 0 QuantifiedInterpolants, 40186 SizeOfPredicates, 159 NumberOfNonLiveVariables, 18388 ConjunctsInSsa, 3219 ConjunctsInUnsatCore, 479 InterpolantComputations, 3 PerfectInterpolantSequences, 7506/20182 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